public input no. 329-nfpa 99-2018 [ global input ......public input no. 269-nfpa 99-2018 [ section...

Public Input No. 329-NFPA 99-2018 [ Global Input ]

Create committee input to clarify differences between medical gases and medical support gases, particularlyin sections 3.3.99, 3.3.100, 3.3.101, and 5.1.13.3.1.

Statement of Problem and Substantiation for Public Input

Potentially reduce requirements for medical support gases.

Submitter Information Verification

Submitter Full Name: Thomas Deary

Organization: Compressed Gas Association

Street Address:

City:

State:

Zip:

Submittal Date: Mon Jun 25 13:55:22 EDT 2018

Committee: HEA-PIP

Committee Statement

Resolution: The submitter did not provide any specific suggestion as to how to accomplish their request.

National Fire Protection Association Report https://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPar...

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Public Input No. 129-NFPA 99-2018 [ Section No. 3.3.19.4 ]

3.3.19.4 Micro-Bulk Cryogenic System.

An assembly of equipment including a container that is permanently installed through anchoring to afoundation, pressure regulators, pressure relief devices, vaporizers, manifolds, and interconnecting pipingthat is designed to be filled at the health care facility with a cryogenic gas, that has a storage capacity of

less than or equal to 566 m 3 [20,000 ft 3 (scf)] of oxygen, including unconnected reserves on hand at thesite, and that terminates at the source valve.


Term is no longer used in NFPA 99 and is only found in the definitions section.


Submitter Full Name: Rob Early


Affiliation: NFPA 55/99 task group

Street Address:

City:

State:

Zip:

Submittal Date: Sun Jun 03 19:48:44 EDT 2018

Committee: HEA-PIP

Committee Statement

Resolution: FR-909-NFPA 99-2018

Statement: Term is no longer used in NFPA 99 and is only found in the definitions section.


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Public Input No. 269-NFPA 99-2018 [ Section No. 3.3.20 ]

3.3.20 Category 3 Drive Gas System.

An assembly of component parts including, but not limited to, the source, pressure and operating controls,filters and purification equipment, valves, alarm warning systems, alarm wiring, gauges, and a network ofpiping and suitable outlets that produces and distributes compressed air from cylinders, compressed airfrom compressors, or nitrogen from cylinders medical support gas less than 1100 kPa gauge (less than160 psi gauge) to power devices (hand pieces, syringes, cleaning devices, delivery system chairs, and soforth) as a power source. The system includes the compressor intakes and ends with the service outletwhere the user connects their clinical equipment. (PIP)


Medical Support Gas shall be by definition either Nitrogen, Instrument air or combination of the two. This will allow the user to provide support gas from different sources.

Related Public Inputs for This Document

Related Input Relationship

Public Input No. 270-NFPA 99-2018 [Section No. 5.1.11.3.2]

Public Input No. 271-NFPA 99-2018 [Section No. 15.3.2.11]



Public Input No. 274-NFPA 99-2018 [Section No. 5.1.3.8.1.7]

Public Input No. 275-NFPA 99-2018 [Section No. 5.1.12.4.3.2(B)]



Public Input No. 283-NFPA 99-2018 [Section No. 5.1.11 [Excluding any Sub-Sections]]


Submitter Full Name: Mark Franklin

Organization: Sherman Engineering Co

Street Address:

City:

State:

Zip:

Submittal Date: Wed Jun 20 13:40:45 EDT 2018

Committee: HEA-PIP

Committee Statement

Resolution: This term is being deleted from the code.


3 of 192 11/2/2018, 10:45 AM

Public Input No. 124-NFPA 99-2018 [ New Section after 3.3.28 ]

TITLE OF NEW CONTENT

3.3.xx * Compressed Medical Gases (CMG).Any liquefied or vaporized gas alone or in combination with other gases that isclassified as a drug. [55;2020]


The term "CMG" is used in new material extracted from NFPA 55, so the term should be in the definitions.



Public Input No. 126-NFPA 99-2018 [New Section after A.3.3.27]

Public Input No. 126-NFPA 99-2018 [New Section after A.3.3.27]





Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: The term "CMG" is used in new material extracted from NFPA 55, so the term should be in thedefinitions.


4 of 192 11/2/2018, 10:45 AM


3.3.32.1 Bulk Cryogenic Fluid Central Supply System.

A cryogenic fluid central supply system with a storage capacity of more than 566 m 3 [20,000 ft 3 (scf)].


The term is being replaced by "cryogenic fluid central supply systems" throughout NFPA 99.





Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: The term is being replaced by "cryogenic fluid central supply systems" throughout NFPA 99.


5 of 192 11/2/2018, 10:45 AM


3.3.32.3 Micro-Bulk Cryogenic Fluid Central Supply System.

A cryogenic fluid central supply system with a storage capacity of less than or equal to 566 m 3 [20,000 ft 3

(scf)].


The term is no longer used in NFPA 99 and is found only in the definitions.




Affiliation: NFPA 55/99 task group.

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: The term is no longer used in NFPA 99 and is found only in the definitions.


6 of 192 11/2/2018, 10:45 AM


3.3.107 Medical Support Gas.

Nitrogen gas from cylinders, nitrogen vapor from cryogenic liquid containers or liquid nitrogen fromcryogenic liquid containers or instrument air used for any medical support purpose (e.g., to remove excessmoisture from instruments before further processing, or to operate medical–surgical tools, air-driven booms,pendants, or similar applications or to cryogenically preserve specimans ) and, if appropriate to theprocedures, used in laboratories and are not respired as part of any treatment. Medical support gas fallsunder the general requirements for medical gases. (PIP)


Liquid N2 is currently being used in laboratories as a medical support gas to preserve specimens within health care facilities but it is currently not governed by an NFPA standard. People are undergoing procedures in these laboratories. A failure of these systems through their operation or equipment may cause major injury or death of patients, staff or visitors. My opinion is that it needs to be governed by an NFPA standard and NFPA 99 is the appropriate one.


Submitter Full Name: James Lucas

Organization: Tri-Tech Medical Inc.

Street Address:

City:

State:

Zip:

Submittal Date: Fri Jun 22 14:18:36 EDT 2018

Committee: HEA-PIP

Committee Statement

Resolution: This proposed topic will require significant work and consideration of the impacts throughout Chapter5. The technical committee will establish a task group to review this issue and see how it might beable to be implemented at the comment stage.


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5.1.1.1

These requirements shall apply to health care facilities that require Category 1 systems as referenced inChapter 4.

Note: For Category 1 dental gas and vacuum systems, see section 15.3 and for Category 1 hyperbariccare see, section 14.1.3.1.


Currently no clear direction is provided to send users to Chapter 15 of this code for Dental applications or Hyperbaric applications. This revision helps to direct the user to the correct section of the code for the applications identified. This was discussed by the Technical committee during the Pre-First Draft meeting and I volunteered to submit the public input to provide this direction.








Submitter Full Name: Mark Fasel

Organization: Viega LLC

Street Address:

City:

State:

Zip:

Submittal Date: Wed May 30 13:41:31 EDT 2018

Committee: HEA-PIP

Committee Statement

Resolution: The TC on Piping supports references such as what are proposed but the language is better suitedunder Section 1.1. The TC on Piping requests that the Correlating Committee direct the input to theFundamentals committee to consider in Chapter 1.


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5.1.1.2

Category 1 piped gas or piped vacuum system requirements shall be applied where any of the followingcriteria is met:

(1) General anesthesia or deep sedation is performed as defined in 3.3.65.1 and 3.3.65.2 .

(2) The loss of the piped gas or piped vacuum systems is likely to cause major injury or death of patients,staff, or visitors.

(3) The facility piped gas or piped vacuum systems are intended for Category 1 patient care space per3.3.135.1 .


Chapter 4 adequately addresses the risk considerations that must be made in determining Category designation. References to specific levels of sedation/anesthesia was originally included to try make sure the appropriate Category was applied in dental applications where confusion had existed for years. The new Chapter 15 makes the application to all dental settings clear and bases it on the level of sedation/anesthesia. There are many instances where a patient can be dependent on a piped medical gas/vacuum system but are not under anesthesia. This is all addressed in a risk assessment done per Chapter 4.






Submitter Full Name: James Lathrop

Organization: Koffel Associates, Inc.

Affiliation: None

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The language proposed for deletion provides guidance as to how risk Categories are to be appliedspecific to medical gas and vacuum systems.


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5.1.1.2

Category 1 piped gas or piped vacuum system requirements shall be applied where any of the followingcriteria is met:

(1) Inhaled General anesthesia or deep sedation is performed as defined in 3.3.65.1 and 3.3.65.2.

(2) The loss of the piped gas or piped vacuum systems is likely to cause major injury or death of patients,staff, or visitors.

(3) The facility piped gas or piped vacuum systems are intended for Category 1 patient care space per3.3.135.1.


The rules in chapter 5 for piping do not apply when the anesthesia is administered via a shot. A WAGD inlet will not provide any protection for the surgery team under that circumstance. See the definition for Anesthetic 3.3.7: As used in this code, applies to any inhalational agent used to produce sedation, analgesia, or general anesthesia. (MED)


Submitter Full Name: Corky Bishop

Organization: Apex Medical Gas Systems

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The risks are the same whether the anesthetic are inhaled or given via injection. The medical gas andvacuum system need to be designed and installed based on the level of anesthesia rather than howthe anesthesia is administered.


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5.1.1.4

An existing system that is not in strict compliance with the provisions of this code shall be permitted to becontinued in use as long as the authority having jurisdiction has determined that such use does notconstitute a distinct hazard to life.


This section is incorrectly stated and the requirement is already covered by section 1.3.2.3.


Submitter Full Name: Peter Leszczak

Organization: PSL Engineering, LLC

Affiliation: n/a

Street Address:

City:

State:

Zip:

Submittal Date: Mon Feb 26 10:00:50 EST 2018

Committee: HEA-PIP

Committee Statement


Statement: This section has been revised to match the language in Chapter 1 which permits previously approvedsystems to remain in use unless the AHJ determines a distinct hazard to life rather than saying theAHJ has to determine that there is no distinct hazard to life. Annex material has been added toprovide guidance on the overall application of Chapter 5 to existing systems that undergo changes.


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5.1.1.4

An existing system

that is not in strict compliance with the provisions

built in accordance with an earlier edition of this code shall be permitted to

be continued

continue in use as long as

the authority having jurisdiction has determined that such use does not constitute a distinct hazard to life.

no element is disturbed. For this purpose, disturbed includes any process which requires system shutdown and opening of any part of the system to atmosphere. Examples included replacements,exchanges, portions added to or portions removed from, except simple like for like exchange as part of arepair or normal maintenance.

When any element(s) of the system are disturbed the following shall occur:

(A) the specific element(s) which were disturbed shall be brought into compliance with the most recentedition of this Code.

(B) all elements of the system shall be evaluated and any portions of the system affected by a change ofthis Code shall be enumerated.

(C) through a risk analysis, the Authority Having Jurisdiction shall list any of these portions where a distincthazard to life is apparent or is created by disturbing the element(s) under consideration. These portionsshall then be brought into compliance with the most recent edition of this Code. All other portions shall bepermitted to remain undisturbed.

(D) after completion of all corrections and updates, and appropriate testing if required under 5.1.12, theentire system shall then be considered an "existing system" for the purposes of this Code.

(E) the decisions and results of the risk analysis and final testing shall be made part of the permanentrecords of the facility for reference if the system must be disturbed in future.


The question of how far one must go to comply with a new edition after an old system is repaired, or more or less minor work is done, is an ongoing problem. One recent example is a facility which was denied approvals because a pipeline had been painted. This occurred in around 2000, before the standard prohibited painting. Clearly this is not a distinct hazard to life, but arguably the Authority was correct in that it did not meet the standard now. The presumption should be that a system which was built to an earlier edition is safe until something is done to change that, and that except for the new work, that the old work continues to be safe. The proposed language attempts to shift the rule in 5.1.1.4 toward this presumption of acceptability. It shifts the burden from the AHJ giving permission for continued use to the AHJ applying risk analysis to say why it's use can't continue.


Submitter Full Name: Mark Allen

Organization: Beacon Medaes

Street Address:

City:

State:

Zip:


Committee: HEA-PIP


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Committee Statement




13 of 192 11/2/2018, 10:45 AM


5.1.1.4

An existing system that is not in strict compliance with the provisions of this code shall be permitted to becontinued in use as long as , unless the authority having jurisdiction has determined that such use doesnot constitute use constitutes a distinct hazard to life.


This reflects the same text as in section 1.3.2.3. The existing text requires all existing systems to be updated to meet the new code requirements unless the AHJ approves the existing systems. The existing text puts the onus on the AHJ to evaluate and approve all existing systems.


Submitter Full Name: Peter Larrimer

Organization: US Department of Veterans Affa

Street Address:

City:

State:

Zip:

Submittal Date: Thu Feb 15 14:28:51 EST 2018

Committee: HEA-PIP

Committee Statement




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Public Input No. 214-NFPA 99-2018 [ New Section after 5.1.1.5 ]


Type your content here ...

5.1.1.6 Medical gas outlet and inlets in Category 1 spaces (see 3.3.135.1) shall be supplied only from sources and

through piping networks compliant with Category 1.


Changes in the way the standard is treating "spaces" and the real possibility of Category 1, 2 and 3 spaces being supplied from the same sources suggests this limitation needs to be clarified.





Public Input No. 215-NFPA 99-2018 [New Section after 5.2.1.3]





Street Address:

City:

State:

Zip:

Submittal Date: Thu Jun 14 05:45:21 EDT 2018

Committee: HEA-PIP

Committee Statement


Statement: Changes in the way the standard is treating "spaces" and the real possibility of Category 1, 2 and 3spaces being supplied from the same sources suggests this limitation needs to be clarified.


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5.1.1.5

The following sections of this chapter shall apply to the operation, management, and maintenance ofCategory 1 medical gas and vacuum systems in both new and existing facilities:

(1) 5.1.2

(2) 5.1.3.1

(3) 5.1.3.2

(4) 5.1.3.3. 2

(5) 5.1.3.3.3

(6) 5.1.3.3. 4

(7) 5.1.3.6.2

(8) 5.1.3.6.3.10(A)(2)

(9) 5.1.3.7.6(A)(2)

(10) 5.1.3.8.4.3(A)(2)

(11) 5.1.14


5.1.3.3.4.1, which is retroactive, references 5.1.3.3.2 and 5.1.3.3.3 which makes them retroactive and should be on the list. If they are not retroactive, it would allow one to store cylinders and containers anywhere in the building. If the committee see specific items that should not be retroactive, then modify those specific requirements such as has been suggested in PI 207 on 5.1.3.3.2



Public Input No. 207-NFPA 99-2018 [Section No. 5.1.3.3.2]addressess application to existingstructures.

Public Input No. 230-NFPA 99-2018 [Section No.A.5.1.3.3.2]




Affiliation: None

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement



16 of 192 11/2/2018, 10:45 AM

Statement: Sections 5.1.3.3.2 and 5.1.3.3.3 address construction and ventilation for storage locations and shouldbe met for both new and existing facilities.


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Public Input No. 298-NFPA 99-2018 [ Section No. 5.1.3.1.8 ]

5.1.3.1.8

Locations Rooms containing positive pressure gases other than oxygen and medical air shall have theirdoor(s) labeled as follows:

Positive Pressure Gases

NO Smoking or Open Flame

Room May Have Insufficient Oxygen

Open Door and Allow Room to Ventilate Before Entering


many locations don't have doors and do not pose a risk This makes the sign not needed


Submitter Full Name: David Dagenais

Organization: Partners/Wentworth-Douglass Ho

Street Address:

City:

State:

Zip:

Submittal Date: Sat Jun 23 15:40:49 EDT 2018

Committee: HEA-PIP

Committee Statement

Resolution: This section is intended to be applied to those locations with central supply systems, which aredefined to have doors or gates. Even those outdoors should have the labeling.


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5.1.3.1.9

Locations Rooms containing central supply systems or cylinders containing only oxygen or medical airshall have their door(s) labeled as follows:

Medical Gases

NO Smoking or Open Flame


some locations don't have doors




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: This section is intended to be applied to those locations with central supply systems, which aredefined to have doors or gates. Even those outdoors should have the labeling.


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5.1.3.2.5 *

If cylinders are wrapped when received, the wrappers shall be removed prior to storage.

Add an annex notation a follows:A.5.1.3.2.5Wrappers (or over packs) are intended to provide an outer package for transport, such as a cardboard

box, and typically present a significant combus ble fire load. Cylinders should not be stored in healthcare facili es in

over packs, when the over pack is made of a combus ble material with a significant fire load. Valve shrink wraps

used to seal the valve connec on, and outer ne ng applied to cylinders that does not cover more than 50% of the

cylinder surface and only intended to protect the cylinder paint coa ngs and side wall labels from damage, is not

considered a wrapper.


Wrappers, such as, valve shrink wraps and cylinder netting does not present a significant fire load or hazard. the problems is over-pack materials, like cardboard.

So add an Annex note to clarify.


Submitter Full Name: John Anicello

Organization: Airgas Inc.

Street Address:

City:

State:

Zip:

Submittal Date: Fri Jan 19 14:31:57 EST 2018

Committee: HEA-PIP

Committee Statement


Statement: Wrappers, such as, valve shrink wraps and cylinder netting do not present a significant fire load orhazard. the problems is over-pack materials, like cardboard. Annex material has been added to clarifythis.


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5.1.3.2.5


Add in Annex A:

A.5.1.3.2.5

Non-flammable cylinder mesh netting is not considered a wrapper and does not need to be removed by theuser. It is used to protect the labels on the cylinder. The brown paper wrappers referenced had to beremoved to view the cylinder labels.


Many inspectors require hospitals to remove the mesh netting on cylinders because they consider it to be a wrapper. Others mistakenly consider the polymer net to be a flammable material.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement




21 of 192 11/2/2018, 10:45 AM


5.1.3.2.5



these products are used for transport and pose no risk




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement




22 of 192 11/2/2018, 10:45 AM


5.1.3.2.11

Containers shall not be stored in a tightly closed space.


The language proposed for deletion is vague and unenforceable. The code already requires central supply locations to be constructed with room for access (5.1.3.3.2(1)) and they are required to be adequately ventilated (5.1.3.3.3) so this section is not needed




Affiliation: None

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: The language proposed for deletion is vague and unenforceable. The code already requires centralsupply locations to be constructed with room for access (5.1.3.3.2(1)) and they are required to beadequately ventilated (5.1.3.3.3) so this section is not needed


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Public Input No. 95-NFPA 99-2018 [ Section No. 5.1.3.3.1.1 ]

5.1.3.3.1.1

Any of the following central supply systems shall be permitted to be located together in the same outdoorenclosure:

(1) Manifolds for gas cylinders (see 5.1.3.5.12)

(2) Manifolds for cryogenic liquid containers (see 5.1.3.5.13)

(3) Bulk cryogenic liquid Cryogenic fluid central supply systems (see 5.1.3.5.14)

(4)


Section 5.1.3.5.14 has been changed to use the term "cryogenic fluid central supply system."








Affiliation: NFPA 55 / 99 task group

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: Section 5.1.3.5.14 has been changed to use the term "cryogenic fluid central supply system."

* Individual components on the oxygen side of concentrator sources (see 5.1.3.9)


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5.1.3.3.1.7

Bulk nitrous oxide central supply systems shall comply with NFPA 55 and with the mandatory requirementsof CGA G-8.1, Standard for Nitrous Oxide Systems at Customer Sites.


NFPA 55 now has requirements for bulk nitrous oxide central supply systems in chapter 17, Cryogenic fluid central supply systems for health care facilities.








Affiliation: NFPA 55 / 99 task group

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: NFPA 55 now has requirements for bulk nitrous oxide central supply systems in chapter 17,Cryogenic fluid central supply systems for health care facilities.


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5.1.3.3.1.8

Central supply systems for carbon dioxide using permanently installed containers with product capacitiesgreater than 454 kg (1000 lb) shall comply with NFPA 55 and with the mandatory requirements of CGAG-6.1, Standard for Insulated Carbon Dioxide Systems at Consumer Sites.


NFPA 55 now has requirements for carbon dioxide central supply systems in chapter 17, Cryogenic fluid central supply systems for health care facilities.





Street Address:

City:

State:

Zip:

Submittal Date: Thu May 31 12:06:42 EDT 2018

Committee: HEA-PIP

Committee Statement


Statement: NFPA 55 now has requirements for carbon dioxide central supply systems in chapter 17, Cryogenicfluid central supply systems for health care facilities.


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5.1.3.3.1.9

Central supply systems for carbon dioxide using permanently installed containers with product capacities of454 kg (1000 lb) or less shall comply with NFPA 55 and with the mandatory requirements of CGA G-6.5,Standard for Small, Stationary, Insulated Carbon Dioxide Supply Systems.


NFPA 55 now has requirements for carbon dioxide central supply systems in chapter 17, Cryogenic fluid central supply systems for health care facilities.





Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: NFPA 55 now has requirements for carbon dioxide central supply systems in chapter 17, Cryogenicfluid central supply systems for health care facilities.


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5.1.3.3.1.10*

Cryogenic fluid central supply systems for inert gases shall comply with NFPA 55 and with the mandatoryrequirements of CGA P-18, Standard for Bulk Inert Gas Systems at Consumer Sites.


NFPA 55 now has requirements for inert gas central supply systems in chapter 17, Cryogenic fluid central supply systems for health care facilities.





Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: NFPA 55 now has requirements for inert gas central supply systems in chapter 17, Cryogenic fluidcentral supply systems for health care facilities.


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Public Input No. 44-NFPA 99-2018 [ New Section after 5.1.3.3.2 ]

5.1.3.3.3

Design and construction of locations for cryogenic fluid central supply systems shall comply with 5.1.3.5.14.


The siting and location design for cryogenic fluid central supply systems should be extracted from NFPA 55 as agreed to by the NFPA 55/99 task group.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: Requirements that were applicable to cryogenic central supply systems have been deleted from theexisting list as the design for all of these systems is now directed to 5.1.3.5.14.


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5.1.3.3.2* Design and Construction.

Locations for central supply systems and the storage of positive-pressure gases shall meet the followingrequirements:

(1) They shall be constructed with access to move cylinders, equipment, and so forth, in and out of thelocation on hand trucks complying with 11.4.3.1.1.

(2) They shall be provided with lockable doors or gates or otherwise able to be secured.

(3) If outdoors, they shall be provided with an enclosure (e.g., wall or fencing) constructed ofnoncombustible materials.

(4) If outdoors and greater than 18.6 m2 (200 ft2), they shall be provided with a minimum of twoentry/exits.

(5) If outdoors, bulk systems and cryogenic liquid fluid central supply systems shall be provided with aminimum of two entry/exits.

(6) If indoors, they shall have interior finishes of noncombustible or limited-combustible materials.

(7)

(8)

(9)

(10) If heat is required the maximum allowable temperature of the in-room heating element shall be 130°C(266°F).

(11) They shall be provided with racks, chains, or other fastenings to secure all cylinders from falling,whether connected, unconnected, full, or empty.

(12)

(13) They shall have racks, shelves, and supports, where provided, constructed of noncombustiblematerials or limited-combustible materials.

(14) They shall protect electrical devices from physical damage.

(15)

(16) They shall be designed to meet the operational requirements of 5.1.3.2 with regard to roomtemperature.


Updated to require best practice of at least two exits for bulk systems and cryogenic fluid central supply systems.





Street Address:

City:

State:

Zip:


* If indoors, the room shall be separated from the rest of the building by walls and floors having a1–hour fire resistance rating with doors and other opening protectives having a 3⁄4-hour fire protectionrating.

* They shall comply with NFPA 70 for ordinary locations.

* Fuel-fired equipment shall not be located in the room.

* They shall be supplied with electrical power compliant with the requirements for essential electricalsystems as described in Chapter 6.

* They shall allow access by delivery vehicles and management of cylinders.


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Committee: HEA-PIP

Committee Statement




31 of 192 11/2/2018, 10:45 AM


5.1.3.3.2 * Design and Construction.





(4) If outdoors and greater than 18.6 m2 (200 ft2), in new constructin they shall be provided with aminimum of two entry/exits.

(5) If outdoors, in new constructon bulk cryogenic liquid systems shall be provided with a minimum of twoentry/exits.


(7)

(8)

(9)



(12)



(15)



Although 5.1.3.3.2 is not listed in 5.1.1.5 as retroactive, 5.1.3.3.4 which is retroactive references it, therefore it is retroactive. The two revised paragraphs can be difficult to comply with in many existing installations. We need 5.1.3.3.2 to be retroactive or I could store cylinders and containers anywhere I wanted. If the committee feels more paragraphs should be limited to new, that is fine but the main concepts should be retroactive.













32 of 192 11/2/2018, 10:45 AM

Affiliation: None

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: This is a safety concern for workers and should be applicable to existing installations.


33 of 192 11/2/2018, 10:45 AM








(5) If outdoors, bulk cryogenic liquid systems shall be provided with a minimum of two entry/exits.


(7)

(8)

(9)



(12)



(15)



Current language requires that all positive pressure gas systems and storage be located in a one hour room. This would include positive pressure medical air and inert gases. These materials do not provide fuel nor do they contribute to a highly oxygenated environment, therefore there is little need for these systems to be protected from fire. These gases are unlike oxygen and nitrous oxide, which are common medical gases that could contribute to the severity of a fire. It is also not resonable to assume that a 1 hour supply or storage location will ensure continuity of service of these systems during a fire. The services piping that leaves these rooms is not protected by a 1 hour rating and cannot be relied upon to provide continuous services. With either of these concerns, there does not appear to be a significant risk for systems other than oxygen and nitrous oxide. This change acknowledges that and adjust direction to users accordingly.


Submitter Full Name: John Williams

Organization: Washington State Department of Health

Street Address:

* If indoors, the room rooms containing oxygen or nitrous oxide central supply systems shall beseparated from the rest of the building by walls and floors having a 1–hour fire resistance rating withdoors and other opening protectives having a 3⁄4-hour fire protection rating.






34 of 192 11/2/2018, 10:45 AM

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: NFPA 55 requires gas storage locations to have 1-hr fire rated construction for all gases, not just foroxidizers. Even when central supply locations contain medical air compressors and vacuum pumpswith no gases the rating is still appropriate as the mechanical space is often required to have therating per building and life safety codes and it also provide some protection from fires that startoutside and adjacent to the location.


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If

(6) indoors, they shall have interior finishes of noncombustible or limited-combustible materials.

(7)

(8)

(9)



(12)



(15)



5.1.3.3.2 (5) should be deleted it is redundant to 5.1.3.3.2 (4)




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Committee: HEA-PIP







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Committee Statement




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(4) If outdoors and greater than 18.6 m2 (200 ft2), they shall be provided with a minimum of two 1entry/exits exit .



(7)

(8)

(9)



(12)



(15)



the 2nd exit provides little to no benefit




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Committee: HEA-PIP

Committee Statement







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39 of 192 11/2/2018, 10:45 AM










(7)

(8)

(9)



(12)



(15)


(17) If outdoors, medical gas cylinders shall be provided with a structurally sound canopy cover.


Hail storm can easily damage manifold, tubing and controller. Also, allows cylinder change out and maintenance during inclement weather.`


Submitter Full Name: Malcolm Alston

Organization: ACHA

Street Address:

City:

State:

Zip:








40 of 192 11/2/2018, 10:45 AM

Committee: HEA-PIP

Committee Statement

Resolution: The committee generally supports the concept proposed but the language provided is somewhatvague and unenforceable. There is language in Chapter 11 that might help address these concerns.The HEA-PIP committee requests that the correlating committee review this topic and provideguidance as to how to proceed on this issue to maintain correlation with Chapter 11.


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Locations for central supply systems, excluding cryogenic fluid central supply systems, and the storage ofpositive-pressure gases shall meet the following requirements:







(7)

(8)

(9)



(12)



(15)



The siting and location design for cryogenic fluid central supply systems should be extracted from NFPA 55 as agreed to by the NFPA 55/99 task group.




Street Address:

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Committee: HEA-PIP







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Committee Statement




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(4) If outdoors and greater than the battery limit space of the central supply system(s) is less than or

equal to 18.6 m2 (200 ft2), they shall the location for the central supply system(s) shall be providedwith a minimum of two of one entry/exits exit .

(5) If outdoors, bulk cryogenic liquid systems shall and the battery limit space of the central supply

system(s) is greater than 18.6 m 2 (200 ft 2 ), the location for the central supply system(s) shall beprovided with a minimum of two of two entry/exits.


(7)

(8)

(9)



(12)



(15)



NFPA 99, 2018 edition section 5.1.3.3.2 (4) and (5) seem to almost duplicate each other. The intent of the 200 sq ft limit was to allow for 1 entry/exit location due to the size of the central supply system location footprint. This does not seem to be clear as worded in the 2018 edition. This change was to clarify that 200 sq ft or less you need 1 exit/entry (min) and greater then 200 sq ft you need 2 exits/entry (min).


Submitter Full Name: Keith Ferrari

Organization: Praxair, Inc.

Affiliation: Praxair

Street Address:

City:







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Zip:


Committee: HEA-PIP

Committee Statement




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Public Input No. 213-NFPA 99-2018 [ Section No. 5.1.3.5 [Excluding any Sub-Sections] ]

Central supply systems shall be permitted to consist of the following:

(1) Cylinder manifolds for gas cylinders per 5.1.3.5.12

(2) Manifolds for cryogenic liquid containers per 5.1.3.5.13

(3) Cryogenic fluid central supply systems per 5.1.3.5.14

(4) Medical air compressor systems per 5.1.3.6

(5) Medical–surgical vacuum producers per 5.1.3.7

(6) WAGD producers per 5.1.3.8

(7) Instrument air compressor systems per 5.1.13.3.4

(8) Proportioning systems for medical air USP per 5.1.3.6.3.14

(9) Oxygen Central Supply Systems using Concentrators per 5.1.3.9


This was an omission to the original Oxygen Concentrators submission.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: This revision corrects an omission in the previous edition to specifically list oxygen concentratorshere.


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5.1.3.5.2 Permitted Locations for Medical Gases.

Central supply systems for oxygen, medical air, nitrous oxide, carbon dioxide, and all other patient medicalgases shall be piped only to medical gas outlets complying with 5.1.5, into areas where the gases will beused under the direction of licensed medical of qualified professionals for purposes congruent with thefollowing:

(1) Direct respiration by patients

(2) Clinical application of the gas to a patient, such as the use of an insufflator to inject carbon dioxide intopatient body cavities during laparoscopic surgery and carbon dioxide used to purge heart-lung machineblood flow ways

(3) Medical device applications directly related to respiration

(4) Power for medical devices used directly on patients

(5) Calibration of medical devices intended for (1) through (4)

(6) Simulation centers for the education, training, and assessment of health care professionals


The currently language is unclear. Calibration of medical devices may be safely performed by vendors and maintenance staff who may not be directly supervised by a licensed medical professional. Direct supervision could also be interpreted as direct visual supervision, which is also impractical in these cases. Qualified professionals is a reasonable term, that could be directed by the governing body.


Submitter Full Name: John Williams

Organization: Washington State Department of Health

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: Medical gases must be used under the direction of licensed medical professionals. The exampleprovided in the substantiation such as being used by biomedical employees would be under theoverall direction of such a licensed medical professional.


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5.1.3.5.5.2

The line pressure regulators required under 5.1.3.5.5.1, where used for bulk cryogenic liquid for cryogenicfluid central supply systems, shall be of a balanced design.


The term is being replaced with the term "cryogenic fluid central supply systems" in NFPA 55 and NFPA 99.





Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: The term is being replaced with the term "cryogenic fluid central supply systems" in NFPA 55 andNFPA 99.


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Public Input No. 133-NFPA 99-2018 [ New Section after 5.1.3.5.6.1 ]


5.1.3.5.6.2 Pressure relief valves for cryogenic fluid central supply systems shall be in accordance withsection 5.1.3.5.14.10.


This section points the reader to the detailed requirements for relief valves on cryogenic fluid central supply systems extracted from NFPA 55.





Street Address:

City:

State:

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Committee: HEA-PIP

Committee Statement


Statement: This section points the reader to the detailed requirements for relief valves on cryogenic fluid centralsupply systems extracted from NFPA 55.


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5.1.3.5.6.1

All pressure relief valves shall meet the following requirements:

(1) They shall be of brass, bronze, or stainless steel construction.

(2) They shall be designed for the specific gas service.

(3) They shall have a relief pressure setting not higher than the maximum allowable working pressure(MAWP) of the component with the lowest working pressure rating in the portion of the system beingprotected.

(4) They shall be vented to the outside of the building, except that relief valves for compressed air systems

having less than 84,950 L (3000 ft3) at STP shall be permitted to be diffused locally by means that willnot restrict the flow.

(5) They shall have a vent discharge line that is not smaller than the size of the relief valve outlet or 15mm (3/4 NPS) , whichever is larger .

(6) Where two or more relief valves discharge into a common vent line, its the internal cross-sectionalarea of thecommon line shall be not less than the aggregate cross-sectional area of all relief valvevent discharge lines served.

(7) They shall not discharge into locations creating potential hazards.

(8) They shall have the discharge terminal turned down and screened to prevent the entry of rain, snow, orvermin.

(9) They shall be designed in accordance with ASME B31.3, Pressure Process Piping.


There is a conflict between the current language and the requirement in ASME B31.3 322, which requires not less than 3/4" for vent lines.




Street Address:

City:

State:

Zip:

Submittal Date: Wed Feb 21 07:32:33 EST 2018

Committee: HEA-PIP

Committee Statement


Statement: Revised to eliminate a conflict between the current language and the requirement in ASME B31.3322, which requires not less than 3/4" for vent lines.


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5.1.3.5.7 Auxiliary Source Connection.

All cryogenic fluid central supply systems shall be provided with an auxiliary source connection point of thesame size as the main line, which shall be located immediately on the patient side of the source valve.

5.1.3.5.7.1

The connection shall consist of a tee, a valve, and a removable plug or cap.

5.1.3.5.7.2

The auxiliary source connection valve shall be normally closed and secured.


Move this material to a new section 5.1.4.10 where it can apply to piping downstream of the source valve. Current location of the requirement is not correct because it applies to piping upstream of the source valve. See PI-151 for new section 5.1.4.10.









Street Address:

City:

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Zip:


Committee: HEA-PIP

Committee Statement


Statement: Move this material to a new section 5.1.4.10 where it can apply to piping downstream of the sourcevalve. Current location of the requirement is not correct because it applies to piping upstream of thesource valve.


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5.1.3.5.7 Auxiliary Source Connection.

All cryogenic fluid central supply systems shall be provided with an auxiliary source connection point of thesame size as the main line, which shall be located immediately on the patient side of the source valve.

5.1.3.5.7.1

The connection shall consist of a tee, a valve, and a removable plug or cap.

5.1.3.5.7.2

The auxiliary source connection valve shall be normally closed and secured.

5.1.3.5.7.3

The auxillary source connection shall have a non-combustible spill pad directly below the connection point.The area of noncombustible surfacing shall have a minumum width not less than 4 ft (1.21 m) and a lengthof 4ft (1,21 m)

5.1.3.5.7.4

T he auxillary source connection shall be located at least 8ft (2.5 m) from inlets to underground sewr ordrianage systems. ( 55 , 2016)


Connection points have a chance of failure as described in NFPA 55. An auxiliary oxygen connection point will most likely be supplied by a tube trailer filled with cryogenic fluids parked near by with a connection hose brought to the side of the building or connection manifold near the building. During connection or disconnection, cryogenic fluid could spill. If spilled on a non combustible surface such as asphalt, the chemical reaction could cause a fire. Moreover, if the auxiliary connection leaks from improper connection or faulty connection point, then cryogenic fluid may leak and fall onto the surface below or in nearby drains.


Submitter Full Name: Michael Major

Organization: University of California-Davis

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: Cryogenic liquid fluid is not being piped into the system. The connection point is not where this isnecessarily needed as facilities will have different protocols unique to their needs. Storage andplacement of the cryogenic supply that will be connected to the auxiliary source connection isaddressed by NFPA 55.


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5.1.3.5.8 Multiple Pressures.

Where a single central supply system supplies separate piped distribution networks operating at differentpressures, each piped distribution network shall comply with the following :

(1) Medical air compressor systems: 5.1.3.5.5 (pressure regulators) and 5.1.9.2.4(7) (master alarm)

(2) All central supply systems: 5.1.3.5.5 (pressure regulators controls ), 5.1.3.5.6 (relief valves), 5.1.4.2(source valve), and 5.1.9.2.4(7) (master alarm)


There is now no practical difference between requirements for air and other gases, so that has been removed.This will bring these paragraphs into line with the language in 5.1.3.5.5




Street Address:

City:

State:

Zip:

Submittal Date: Tue Jun 26 15:27:47 EDT 2018

Committee: HEA-PIP

Committee Statement


Statement: There is now no practical difference between requirements for air and other gases, so that has beenremoved.

This will bring these paragraphs into line with the language in 5.1.3.5.5


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5.1.3.5.9.1

The following central supply systems shall have local signals located at the source equipment:

(1) Manifolds for gas cylinders without reserve supply (see 5.1.3.5.12)

(2) Manifolds for gas cylinders with reserve supply

(3) Manifolds for cryogenic liquid containers (see 5.1.3.5.13)

(4) Bulk cryogenic liquid Cryogenic fluid central supply systems (see 5.1.3.5.14)

(5) In-building emergency reserves (see 5.1.3.5.16)

(6) Instrument air headers (see 5.1.13.3.4.6)


Section 5.1.3.5.14 uses the heading "cryogenic fluid central supply system"





Street Address:

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Committee: HEA-PIP

Committee Statement


Statement: Section 5.1.3.5.14 uses the heading "cryogenic fluid central supply system"


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5.1.3.5.12.4

The manifolds in this category shall consist of the following:

(1) Two equal headers in accordance with 5.1.3.5.10, each with a sufficient number of gas cylinderconnections for one average day’s supply, but not fewer than two connections, and with the headersconnected to the final line pressure regulator assembly in such a manner that either header can supplythe system

(2) Vent valves, if fitted on a header, vented outside of the building per 5.1.3.5.6.1(5) through 5.1.3.5.6.1(9)and 5.1.3.5.6.2

(3) Intermediate relief valve(s), piped to the outside in accordance with 5.1.3.5.6.1(5) through5.1.3.5.6.1(9), that protects the piping between the header pressure regulator and the line pressureregulator assembly, and protects the line pressure regulators from overpressure in the event of aheader regulator failure

(4) A 0.1µ final filter located in each of the redundant branches of the line pressure controls.


The Code has long mandated filtration to protect the inlet to the first stage pressure regulator, (5.1.3.5.10 (3)) but has never specified the size of the mesh.

While that sizing can be left to the manufacturer, as it has been, a final line filter would protect the distribution pipeline and the patient.




Street Address:

City:

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Zip:


Committee: HEA-PIP

Committee Statement

Resolution: No specific instances or issues were provided to the committee to demonstrate the problem thisaddition would solve. Additionaly, there was nothing provided as justification for the specific filter size.


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Public Input No. 285-NFPA 99-2018 [ New Section after 5.1.3.5.13 ]


Type your content here ...5.1.3.5.14 Manifolds for Cryogenic Liquid Containers liquid withdrawal N2.

5.1.3.5.14.1 Manifolds for N2 cryogenic liquid containers shall be located in accordance with 5.1.3.3.1 andshall meet the following:

(1) If located outdoors, they shall be installed in an enclosure used only for the enclosure of such containersand sited to comply with minimum distance requirements in Table 5.1.3.5.14.1.

(2) If located indoors, they shall be installed within a room used only for the enclosure of such containers.

Table 5.1.3.5.14.1 Minimum Separation Distance Between Portable Cryogenic Containers and Exposures

_________________________________________________________________________________________

Minimum Distance

_____________________________________________

Exposure ft m

(1) Building exits 10 3.1

(2) Wall openings 1 0.3

(3) Air intakes 10 3.1

(4) Property lines 5 1.5

(5) Room or area exits 3 0.9

(6) Combustible materials,

(e.g., paper, leaves, weeds, dry grass, deris) 15 4.5

(7) Incompatible hazardous materials 20 6.1

5.1.3.5.14.2 The manifolds in this category shall have their primary and secondary headers located in thesame enclosure.

5.1.3.5.14.3 The manifolds in this category shall consist of the following:

(1) Two equal headers per 5.1.3.5.10, each having sufficient capacity to meet the required peak flow rateand each having sufficient number of liquid container connections for one average day's supply, and withthe headers connected to the final line pressure regulator assembly in such a manner that either header cansupply the system.

(2) Pressure relief installed downstream of the connection of the reserve header and upstream of the finalline pressure regulating assembly and set at 50 percent above the nominal inlet pressure.

5.1.3.5.14.4 The manifolds in this category shall include an automatic means of controlling the two headersto accomplish the following during normal operation:

(1) One cryogenic liquid header shall be the primary and the other shall be the secondary, with either beingcapable of either role:

(2) When the primary header is supplying the system, the secondary header is prevented from supplyingthe system.

(3) When the primary header is deplaeted, the secondary header automatically begins to supply the system.

5.1.3.5.14.5 The manifolds in this category shall include a manual or automatic means to place eitherheader into the role of primary header and the other into the role of secondary header.

5.1.3.5.14.6 The manifolds in this category shall have a local signal that visibly indicates the operatingstatus of the equipment and activates an indicator at all master alarms w hen or at a predetermined setpoint before the secondary header begins to supply the system, indicating changeover.


Fertility clinics fall under the 3.3.71 definition of Health Care Facilities. Procedures are performed on patients within the facility wherein the failure of the N2 medical gas activities,system or equipment could cause major injury


56 of 192 11/2/2018, 10:45 AM

or death of patients, staff or visitors. This application of a medical gas has been overlooked in all previous editions of the code and needs to be included.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement



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5.1.3.5.13* Manifolds for Cryogenic Liquid Containers vapor withdrawal .

5.1.3.5.13.1

Manifolds for cryogenic liquid containers shall be located in accordance with 5.1.3.3.1 and shall meet thefollowing:

(1) If located outdoors, they shall be installed in an enclosure used only for the enclosure of suchcontainers and sited to comply with minimum distance requirements in Table 5.1.3.5.13.1.



Minimum Distance

Exposure ft m






(6) Combustible materials, (e.g., paper, leaves, weeds, dry grass, debris) 15 4.5


[55:Table 8.7.3]

5.1.3.5.13.2

The manifolds in this category shall have their primary and secondary headers located in the sameenclosure.

5.1.3.5.13.3

The reserve header shall be permitted to be located in the same enclosure as the primary and secondaryheaders or in another enclosure compliant with 5.1.3.5.13.1.

5.1.3.5.13.4


(1) Two equal headers per 5.1.3.5.10, each having sufficient internal or external vaporization capacity tomeet the required peak flow rate and each having sufficient number of liquid container connections forone average day’s supply, and with the headers connected to the final line pressure regulator assemblyin such a manner that either header can supply the system

(2) Reserve header per 5.1.3.5.10 having sufficient number of gas cylinder connections for one averageday’s supply, but not fewer than three connections, and connected downstream of theprimary/secondary headers and upstream of the final line pressure regulators

(3) Pressure relief installed downstream of the connection of the reserve header and upstream of the finalline pressure regulating assembly and set at 50 percent above the nominal inlet pressure


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5.1.3.5.13.5

The manifolds in this category shall include an automatic means of controlling the three headers toaccomplish the following during normal operation:

(1) If provided with two liquid container headers, one cryogenic liquid header shall be the primary and theother shall be the secondary, with either being capable of either role.

(2) If provided with one liquid container header and one gas cylinder header (a hybrid arrangement), theliquid container header is the primary and the gas cylinder header is the secondary.


(4) When the primary header is depleted, the secondary header automatically begins to supply thesystem.

5.1.3.5.13.6

The manifolds in this category shall be equipped with a means to conserve the gas produced byevaporation of the cryogenic liquid in the secondary header (when so provided). This mechanism shalldischarge the conserved gas into the system upstream of the final line regulator assembly.

5.1.3.5.13.7

The manifolds in this category shall include a manual or automatic means to place either header into therole of primary header and the other into the role of secondary header, except where a liquid/gas hybridmanifold is employed.

5.1.3.5.13.8

The manifolds in this category shall include a means to automatically activate the reserve header if for anyreason the primary and secondary headers cannot supply the system.

5.1.3.5.13.9

The manifolds in this category shall have a local signal that visibly indicates the operating status of theequipment and activates an indicator at all master alarms under the following conditions:

(1) When or at a predetermined set point before the secondary header begins to supply the system,indicating changeover

(2) Where a hybrid arrangement is employed, when or at a predetermined set point before the secondary(cylinder) header contents fall to one average day’s supply, indicating secondary low

(3) When or at a predetermined set point before the reserve header begins to supply the system,indicating reserve is in use

(4) When or at a predetermined set point before the reserve header contents fall to one average day’ssupply, indicating reserve low


Adding a new series of paragraphs covering "Manifolds for Cryogenic Liquid Containers liquid withdrawal N2". Need to differentiate between vapor withdrawal from cryogenic liquid containers and liquid withdrawal from cryogenic liquid containers.




Street Address:

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Committee: HEA-PIP

Committee Statement


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5.1.3.5.13 * Manifolds for Cryogenic Microbulk Cryogenic Liquid Containers.

5.1.3.5.13.1

Manifolds for cryogenic liquid containers shall be located in accordance with 5.1.3.3.1 and shall meet thefollowing:

(1) If located outdoors, they shall be installed in an enclosure used only for the enclosure of suchcontainers and sited to comply with minimum distance requirements in Table 5.1.3.5.13.1.



Minimum Distance

Exposure ft m






(6) Combustible materials, (e.g., paper, leaves, weeds, dry grass, debris) 15 4.5


[55:Table 8.7.3]

5.1.3.5.13.2

The manifolds in this category shall have their primary and secondary headers located in the sameenclosure.

5.1.3.5.13.3

The reserve header shall be permitted to be located in the same enclosure as the primary and secondaryheaders or in another enclosure compliant with 5.1.3.5.13.1.

5.1.3.5.13.4






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5.1.3.5.13.5

The manifolds in this category shall include an automatic means of controlling the three headers toaccomplish the following during normal operation:

(1) If provided with two liquid container headers, one cryogenic liquid header shall be the primary and theother shall be the secondary, with either being capable of either role.

(2) If provided with one liquid container header and one gas cylinder header (a hybrid arrangement), theliquid container header is the primary and the gas cylinder header is the secondary.


(4) When the primary header is depleted, the secondary header automatically begins to supply thesystem.

5.1.3.5.13.6

The manifolds in this category shall be equipped with a means to conserve the gas produced byevaporation of the cryogenic liquid in the secondary header (when so provided). This mechanism shalldischarge the conserved gas into the system upstream of the final line regulator assembly.

5.1.3.5.13.7

The manifolds in this category shall include a manual or automatic means to place either header into therole of primary header and the other into the role of secondary header, except where a liquid/gas hybridmanifold is employed.

5.1.3.5.13.8

The manifolds in this category shall include a means to automatically activate the reserve header if for anyreason the primary and secondary headers cannot supply the system.

5.1.3.5.13.9

The manifolds in this category shall have a local signal that visibly indicates the operating status of theequipment and activates an indicator at all master alarms under the following conditions:

(1) When or at a predetermined set point before the secondary header begins to supply the system,indicating changeover

(2) Where a hybrid arrangement is employed, when or at a predetermined set point before the secondary(cylinder) header contents fall to one average day’s supply, indicating secondary low

(3) When or at a predetermined set point before the reserve header begins to supply the system,indicating reserve is in use

(4) When or at a predetermined set point before the reserve header contents fall to one average day’ssupply, indicating reserve low


The term Micro-Bulk was taken out. It is still listed under Bulk Systems in the Definitions.



Organization: ACHA

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: def deleyed


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5.1.3.5.13.4





(4) If provided with one liquid container header (primary), one gas cylinder header (secondary) and areserve gas cylinder header (a hybrid arrangement), the secondary gas cylinder header per 5.1.3.5.10shall have sufficient number of gas cylinder connections for one average day's supply but not fewerthan three connections.


The minimum number of gas cylinder connections for the secondary gas cylinder header in a hybrid system as not been included in previous editions. This should be added.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: This adds the minimum number of gas cylinder connections for the secondary gas cylinder header ina hybrid system as not been included in previous editions.


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5.1.3.5.14 *

Cryogenic Fluid Central Supply Systems.

A. 5.1.3.5.14 For bulk oxygen systems, see NFPA 55 . See Figure A.5. 1 .3.5.14(a) and FigureA.5.1.3.5.14(b). Two possible choices of reserves are illustrated. Both are not required.

5.1.3.5.14.1

CryogenicGeneral.

5.1.3.5.14.1.1 *

The storage, use, and handling of cryogenic fluid central supply systems that deliver compressed medicalgases (CMGs) to health care facilities shall be in accordance with

NFPA 55.the requirements of this section. [ 55 :17.1.1]

A. 5.1.3.5.14. 1.1

The cryogenic fluid central supply system should be installed on a site that has been prepared tomeet the requirements of NFPA 55. A storage unit(s), reserve, pressure regulation, and signalactuating switch(es) are components of the supply system. Shutoff valves, piping from the site,and electric wiring from a signal switch(es) to the master signal panels are components of thepiping system. [ 55 :A.17.1.1]

5.1.3.5.14.1. 2

Bulk cryogenic liquid systems shall have the following protections:

Be installed in accordance with NFPA 55Be installed in accordance with the mandatory requirements inApplicability.

5.1.3.5.14.1.2.1

The source valve shall be the line separating the applicability between NFPA 55 and NFPA99. [ 55 :17.1.2.1]5.1.3.5.14.1.2.2 Cryogenic fluid central supply system installations up to, but not including, the sourcevalve shall be covered by NFPA 55. [ 55 :17.1.2.2]5.1.3.5.14.1.2.3 The source valve and all downstream piping and components, including wiring tostorage system alarms, shall be covered by NFPA 99. [ 55 :17.1.2.3]5.1.3.5.14.2 Cryogenic Fluid Central Supply Systems Installation.5.1.3.5.14.2.1 Cryogenic fluid central supply systems shall be installed by personnel qualified inaccordance with ANSI/CGA M-1, Standard for Medical Gas Supply Systems at Health CareFacilities , or ASSE 6015, Professional Qualification Standard for Bulk Medical Gas SystemsInstallers . [ 55 :17.2.1]5.1.3.5.14.2.2 Cryogenic fluid central supply systems shall be installed in compliance with the Foodand Drug Administration (FDA) Current Good Manufacturing Practices per 21 CFR 210and 21 CFR 211. [ 55 : 17.2.2]5.1.3.5.14.2.3 Cryogenic fluid central supply systems shall be anchored with foundations inaccordance with ANSI/ CGA M-1, Standard for Medical Gas Supply Systems at Health CareFacilities

Have. [ 55 :17.2.3]5.1.3.5.14.2.4 Cryogenic fluid central supply systems shall have a minimum work space clearanceof3 ft3 ft (


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1 m1 m ) around the storage container, vaporizer(s), andthecabinet opening or front side of the pressure - regulating manifold for systemmaintenance and operation. [ 55 :17.2.4]5.1.3.5.14. 2.5 Inert cryogenic fluid central supply systems shall be sited in accordance withChapter 8 and CGA P-18, Standard for Bulk Inert Gas Systems . [ 55 :17.2.5]5.1. 3 .5.14.2.6 Oxygen cryogenic fluid central supply systems shall be sited in accordance withChapters 8 and 9, as applicable, and CGA M-1, Standard for Medical Gas Supply Systems atHealth Care Facilities . [ 55 :17.2.6]5.1.3.5.14.2.7 Carbon dioxide cryogenic fluid central supply systems shall be sited in accordancewith Chapter 13 and CGA G-6.1, Standard for Insulated Liquid Carbon Dioxide Systems atConsumer Sites . [ 55 :17.2.7]5.1.3.5.14.2.8 Nitrous oxide cryogenic fluid central supply systems shall be sited in accordancewith Chapter 16 and CGA G-8.1, Standard for Nitrous Oxide Systems at Customer Sites .[ 55 :17.2.8]5.1.3.5.14.3 Cryogenic Fluid Central Supply Systems Operation.5.1.3.5.14.3.1 The following components of the cryogenic fluid central supply system shall beaccessible and visible to delivery personnel during filling operations:

(1) Fill connection(2) Top and bottom fill valves(3) Hose purge valve(4) Vent valve(5) Full trycock valve(6) Liquid level gauge[ 55 :17.3.1]

5.1.3.5.14.3.2 Cryogenic fluid central supply systems shall consist of the following:

(1) One or more main supply vessel, with capacity determined afterconsideration of the customer usage requirements, delivery schedules,proximity of the facility to alternative supplies, and the emergency plan(2) A contents gauge on every main vessel(3) A reserve supply sized for greater than an average day's supply, with thesize of vessel or number of cylinders determined after consideration of deliveryschedules, proximity of the facility to alternative supplies, and the emergencyplan(4) At least two main vessel relief valves and rupture discs installeddownstream of a three-way (i.e., three-port) valve(5) A check valve located in the primary supply piping upstream of theintersection with a secondary supply or reserve supply[ 55 : 17.3.2]

5.1.3.5.14.3.3 Reserve CMG supply systems consisting of either a second cryogenic fluid source ora compressed gas source shall include the following:

(1) Where the reserve source is a compressed gas source, the reserve shallbe equipped with the following:

(a) A cylinder manifold having not less than three gas cylinderconnections or as otherwise required for an average of one day's gas


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supply(b) A pressure switch to monitor the pressure in the cylinder manifold

(2) Where the reserve source is a second cryogenic fluid vessel, the reservetank shall be equipped with the following:

(a) An actuating switch or sensor to monitor the internal tank pressure(b) A contents gauge to monitor the liquid level

(3) Where the reserve source is either a cryogenic fluid or compressed gassource, a check valve shall be provided to prevent backflow into the reservesystem.[ 55 :17.3.3}

5.1.3.5.14.3.4 Bulk cryogenic liquid sources shall include automatic means to provide the followingfunctions:

(1) When the main supply is supplying the system, the reserve supply shall beprevented from supplying the system until the main supply is reduced to a levelat or below the reserve activation pressure.(2) When the main supply cannot supply the system, the reserve supply shallautomatically begin to supply the system.(3) Where there is more than one main supply vessel, the system shalloperate as

described in 5.1.3.5.13follows for primary, secondary, and reserve operation :

(a) If provided with two liquid container headers, one cryogenic liquidheader shall be the primary and the other shall be the secondary, witheither being capable of either role .(b) If provided with one liquid container header and one gas cylinderheader (i.e., a hybrid arrangement), the liquid container header shall bethe primary and the gas cylinder header shall be the secondary.(c) When the primary header is supplying the system, the secondaryheader shall be prevented from supplying the system.(d) When the primary header is depleted, the secondary header shallautomatically begin to supply the system.

(4) Where there are two or more cryogenic vessels, they shall be permitted toalternate (e.g., on a timed basis) in the roles of primary, secondary, andreserve, provided that an operating cascade ( i.e., primary–secondary–reserve)

as required in 5.1.3.5.13.5is maintained at all times.(5) Where a cryogenic vessel is used as the reserve, the reserve vessel shallinclude a means to conserve the gas produced by evaporation of the cryogenicliquid in the reserve vessel and to discharge the gas into the line upstream ofthe final line regulator assembly

as required by.[ 55 :17.3.4]

5.1.3.5.14.4 Main Supply System.The main supply vessel for a cryogenic fluid central supply system shall be acryogenic storage tank. [ 55 :17.4]5.1.3.5.14.5 Reserve Supply System.5.1.3.5.14.5.1 A CMG reserve supply system shall consist of either of the following:

(1) A secondary cryogenic vessel(2) A high-pressure compressed gas source[ 55 :17 .5.1]

5.1.3.5.14.5.2


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A cryogenic source reserve supply shall have a switch or sensor to monitor the tankpressure. [ 55 :17.5.2]5.1.3.5.14.5.3 A compressed gas reserve supply shall meet the following requirements:

(1) It shall be manifolded with no fewer than three gas cylinders.(2) It shall have a pressure switch or sensor to monitor the contents usingmanifold pressure.(3) It shall have a check valve to prevent backflow into the system.(4) It shall have a check valve at each connection on the cylinder header tominimize loss of gas from the reserve system.[ 55 :17.5.3]

5.1.3.5.14.6 Cryogenic Fill System.Cryogenic fluid central supply systems shall include a fill mechanism consisting ofthe following components:

(1) A nonremovable product-specific fill connection in compliance with CGAV-6, Standard Cryogenic Liquid Transfer Connection

(2) A means to cap and secure the fill connection inlet(3) A check valve to prevent product backflow from the fill inlet(4) A fill hose purge valve(5) Supports that hold the fill piping off the ground(6) A secure connection between the bulk tank and the fill piping(7) Supports, as necessary, to hold the fill line in position during alloperations associated with the filling procedure[ 55 :17.6]

5.1.3.5.14.7 Vaporizers.5.1.3.5.14.7.1 Vaporizers used to convert cryogenic CMG to a gaseous state shall meet the followingrequirements:

(1) Vaporizers shall be permitted to operate by either ambient heat transferor external thermal source (e.g., electric heater, hot water, steam).(2) Vaporizers using a heat source other than ambient air shall be protectedin the event of a loss of the energy source.[ 55 :17.7.1]

5.1.3.5.13.6.14.7.2 Vaporizers shall be designed to provide capacity for the customer’s use under thefollowing conditions:

(1) Customer’s average and peak flows(2) Local conditions (e.g., structures that obstruct air circulation or sunlight)(3) Seasonal conditions (e.g., freeze periods)[ 55 :17 .7.2]

5.1.3.5.14.7.3 A system design that uses switching vaporizers shall meet all of the followingrequirements:

(1) Valves shall be permitted to be manual or automatic.(2) Valves and piping shall allow an operating vaporizer or an operatingsection of a vaporizer to be switched to a nonoperating condition for deicing.(3) The system design shall provide continuous flow of CMG to the healthcare facility during vaporizer switchover.(4) The system design shall provide continuous flow of CMG to the health


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care facility if vaporizer switchover fails.[ 55 :17.7.3]

5.1.3.5.14.7.4 Where a vaporizer uses an external thermal source, the flow of the CMG shall beunaffected by the loss of the external thermal source by one of the followingmethods:

(1) Reserve ambient heat transfer vaporizers sized for at least one day’saverage supply and piped so that the flow of the CMG is unaffected by flowstoppage through the external thermal source vaporizer(2) A noncryogenic source capable of providing at least one day’s averagesupply[ 55 :17.7.4]

5.1.3.5.14.7.5 Where vaporizers are used in the reserve system, they shall be as follows:

(1) Sized by the supplier to provide a source of vaporized CMG from thereserve bulk liquid storage vessel during times when the reserve system isoperational(2) Able to provide a flow rate equal to at least that of the main systemvaporizer(s); however, the duration of flow might be different(3) Indirectly heated by ambient air[ 55 :17.7.5]

5.1.3.5.14.7.6 Low-temperature protection systems that interrupt or reduce flow shall not be usedon the reserve system of cryogenic fluid central supply systems. [ 55 :17.7.6]5.1.3.5.14. 8 High-Pressure Manifolds.5.1.3.5.14.8.1 Manifold assemblies shall be fit for service and shall have supports that areindependent of the cylinders. [ 55 :17.8.1]5.1.3.5.14.8.2 Cylinders on the manifold shall be secured against movement. [ 55 :17.8.2]5.1.3.5.14.8.3 * Cylinders on the manifold shall have the same service pressure rating or the filledpressure of each cylinder shall not exceed the service pressure rating of the lowestrated cylinder on the manifold. [ 55 :17.8.3}A. 5.1.3.5.14.8.3 For example, 2400 psi (16,550 kPa) rated cylinders are notconnected to the same manifold as 2015 psi (13,890 kPa) rated cylinders unless allcylinders, including the 2400 psi (16,550 kPa) cylinders, are filled no greater than2015 psi (13,890 kPa) [ 55 :A.17.8.3]5.1.3.5.14.9 Pressure Control Devices.The final pressure control device assembly or assemblies shall not be fabricated on-site. [ 55 :17.9]5.1.3.5.14.10 Pressure Relief Devices.5.1.3.5.14.10.1 Pressure relief devices (PRDs) shall meet the following requirements:

(1) PRDs shall have a relief pressure setting not higher than the maximumallowable working pressure (MAWP) of the component with the lowest workingpressure rating in the portion of the system being protected.(2) PRDs shall be of brass or bronze construction.(3) PRDs shall be designed for the specific gas service.( 4 ) PRDs shall have the discharge turned down to prevent the entry of rain orsnow.(5) PRDs shall be designed in accordance with ASME B31.3, Pressure ProcessPiping .


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[ 55 :17.10.1]5.1.3.5.14.10.2 PRDs shall have an identifier that contains the date of manufacture or test.[ 55 :17.10.2]5.1.3.5.14.10.3 The final line pressure relief valves shall be approved by a nationally recognizedorganization and shall have a relief capacity greater than or equal to the maximumthroughput of the final line regulator. [ 55 :17.10.3]5.1.3.5.14.10.3.1 The pressure relief valve shall be set at 50 percent above the normal workingpressure, but no higher than the MAWP, of the health care facility pipeline.[ 55 :17.10.3.1]5.1.3.5.14.10.3.2 The relief valve information shall be stamped either on the nameplate of the reliefvalve or on a permanently attached metal tag. [ 55 :17.10.3.2]5.1.3.5.14.11 Tubing and Valves.5.1.3.5.14.11.1 New, hard-drawn Type K or L copper tube shall be used for all process piping.[ 55 :17.11.1]5.1.3.5.14.11.1.1 Tubing shall comply with ASTM B819, Standard Specification for Seamless Copper Tube forMedical Gas Systems . [ 55 :17.11.1.1]5.1.3.5.14.11.1.2 Tubing shall be capped and bear the marking OXY or MEDICAL or be otherwisepackaged and labeled to indicate it is clean for oxygen service according to thesupplier’s policy. [ 55 :17.11.1.2]5.1.3.5.14.11.2 Copper Tubing.5.1.3.5.14.11.2.1 Instrumentation tubing shall be constructed of annealed copper tubing or seamlessstainless steel tubing. [ 55 :17.11.2.1]5.1.3.5.14.11.2.2 Copper tubing shall comply with ASTM B88, Standard Specification for Seamless CopperWater Tube . [ 55 :17 .11.2.2]5.1.3.5.14.11.3 Valves of quick-open or quarter-turn designs, such as ball or plug valves, shall not bepermitted in the high-pressure portion of an oxygen piping system. [ 55 :17.11.3]5.1.3.5.14.11.4 Alternate Materials.5.1.3.5.14.11.4.1 * Alternate materials of construction for piping, tubing, valves, and instruments shall bepermitted for installation at the request of the health care facility or the supplier.[55 :17.11.4.1]5.1.3.5.14.11.4.2 Technical documentation of alternate materials shall be submitted to the health carefacility QA representative to demonstrate equivalency. [ 55 :17.11.4.2]5.1.3.5.14.12 * Alarms.The cryogenic fluid central supply system shall have a local signal that visiblyindicates the operating status of the equipment and an indicator at all master alarmsunder the following conditions:

(1) When , or at a predetermined set point before , the main supply reachesone

an averageday’s

day's supply, indicating low contents


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(2) When , or at a predetermined set point before , the reserve supply beginsto supply the system, indicating reserve is in use(3) When , or at a predetermined set point before , the reserve supplycontents fall to one day's average

day’ssupply, indicating low reserve

low

(4) If the reserve is a cryogenic vessel, when , or at a predetermined setpoint before , the reserve internal pressure falls too low for the reserve tooperate properly, indicating reserve failure(5) Where there is more than one main supply vessel, when , or at apredetermined set point before , the secondary vessel begins to supply thesystem, indicating changeover[ 55 :17.12]

A.5.1.3.5.14.12 The local signal arose from the simple need of a maintenance personto know what is going on with any given piece of source equipment. Note that it isnot an alarm in the sense of a local or master alarm. It is simply an indicator, whichmight be a gauge, a flag, a light, or some other possible manifestation that allows amaintenance person to stand at the equipment and know what conditions are present(e.g., which header of cylinders is in service). The elements to be displayed aretypically those that will also be monitored at the master alarm, but the local signal isvisible at the equipment rather than remotely. [ 55 :A.17.12]

Additional Proposed Changes

File Name Description Approved

NFPA_99_5.1.3.5.14_rewrite.docx Text of public input - new section 5.1.3.5.14


Updated to extract material from new chapter 17, cryogenic fluid central supply systems, in NFPA 55





Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: The code has been updated to extract material from new chapter 17, cryogenic fluid central supplysystems, in NFPA 55. See FR 1140 where the material from NFPA 55 has been added.

Note that the new 5.1.3.5.14.2.4 was revised to require 3 sides of 3 ft clearance. This breaks theextract for this section. Storage vessels and vaporizers can be easily serviced with three sides ofclearance around them. (As long as some common sense is used to keep the controls on theclearance sides). Real estate outside of a Hospital or other healthcare facility is hard to come by andthe additional 3 ft of clearance adds 9 sq ft of additional footprint to the central supply system for eachvessels, vaps and cabinet location. That adds up quickly with multiple tanks and vaporizers on a


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concrete pad. This is a minimum code document. If the owners and manufacturers/suppliers requiretheir equipment to have additional clearance, they can require that during installation.


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1

5.1.3.5.14* Cryogenic Fluid Central Supply Systems. A.5.1.3.5.14 For bulk oxygen systems, see NFPA 55. See Figure A.5.1.3.5.14(a) and Figure A.5.1.3.5.14(b). Two possible choices of reserves are illustrated. Both are not required. 5.1.3.5.14.1 General. 5.1.3.5.14.1.1* The storage, use, and handling of cryogenic fluid central supply systems that deliver compressed medical gases (CMGs) to health care facilities shall be in accordance with the requirements of this section.[55:17.1.1] A.5.1.3.5.14.1.1 The cryogenic fluid central supply system should be installed on a site that has been prepared to meet the requirements of NFPA 55. A storage unit(s), reserve, pressure regulation, and signal actuating switch(es) are components of the supply system. Shutoff valves, piping from the site, and electric wiring from a signal switch(es) to the master signal panels are components of the piping system.[55:A.17.1.1] 5.1.3.5.14.1.2 Applicability. 5.1.3.5.14.1.2.1 The source valve shall be the line separating the applicability between NFPA 55 and NFPA 99.[55:17.1.2.1] 5.1.3.5.14.1.2.2 Cryogenic fluid central supply system installations up to, but not including, the source valve shall be covered by NFPA 55.[55:17.1.2.2] 5.1.3.5.14.1.2.3 The source valve and all downstream piping and components, including wiring to storage system alarms, shall be covered by NFPA 99.[55:17.1.2.3] 5.1.3.5.14.2 Cryogenic Fluid Central Supply Systems Installation. 5.1.3.5.14.2.1 Cryogenic fluid central supply systems shall be installed by personnel qualified in accordance with ANSI/CGA M-1, Standard for Medical Gas Supply Systems at Health Care Facilities, or ASSE 6015, Professional Qualification Standard for Bulk Medical Gas Systems Installers. [55:17.2.1] 5.1.3.5.14.2.2 Cryogenic fluid central supply systems shall be installed in compliance with the Food and Drug Administration (FDA) Current Good Manufacturing Practices per 21 CFR 210 and 21 CFR 211. [55:17.2.2] 5.1.3.5.14.2.3 Cryogenic fluid central supply systems shall be anchored with foundations in accordance with ANSI/CGA M-1, Standard for Medical Gas Supply Systems at Health Care Facilities. [55:17.2.3] 5.1.3.5.14.2.4 Cryogenic fluid central supply systems shall have a minimum work space clearance of 3 ft (1 m) around the storage container, vaporizer(s), and cabinet opening or front side of the pressure-regulating manifold for system maintenance and operation. [55:17.2.4] 5.1.3.5.14.2.5 Inert cryogenic fluid central supply systems shall be sited in accordance with Chapter 8 and CGA P-18, Standard for Bulk Inert Gas Systems. [55:17.2.5] 5.1.3.5.14.2.6 Oxygen cryogenic fluid central supply systems shall be sited in accordance with Chapters 8 and 9, as applicable, and CGA M-1, Standard for Medical Gas Supply Systems at Health Care Facilities. [55:17.2.6] 5.1.3.5.14.2.7 Carbon dioxide cryogenic fluid central supply systems shall be sited in accordance with Chapter 13 and CGA G-6.1, Standard for Insulated Liquid Carbon Dioxide Systems at Consumer Sites. [55:17.2.7] 5.1.3.5.14.2.8 Nitrous oxide cryogenic fluid central supply systems shall be sited in accordance with Chapter 16 and CGA G-8.1, Standard for Nitrous Oxide Systems at Customer Sites. [55:17.2.8] 5.1.3.5.14.3 Cryogenic Fluid Central Supply Systems Operation. 5.1.3.5.14.3.1 The following components of the cryogenic fluid central supply system shall be accessible and visible to delivery personnel during filling operations:

(1) Fill connection

(2) Top and bottom fill valves

(3) Hose purge valve

(4) Vent valve

(5) Full trycock valve

2

(6) Liquid level gauge

[55:17.3.1]

5.1.3.5.14.3.2 Cryogenic fluid central supply systems shall consist of the following:

(1) One or more main supply vessel, with capacity determined after consideration of the customer usage requirements, delivery schedules, proximity of the facility to alternative supplies, and the emergency plan

(2) A contents gauge on every main vessel

(3) A reserve supply sized for greater than an average day's supply, with the size of vessel or number of cylinders determined after consideration of delivery schedules, proximity of the facility to alternative supplies, and the emergency plan

(4) At least two main vessel relief valves and rupture discs installed downstream of a three-way (i.e., three-port) valve

(5) A check valve located in the primary supply piping upstream of the intersection with a secondary supply or reserve supply

[55:17.3.2]

5.1.3.5.14.3.3 Reserve CMG supply systems consisting of either a second cryogenic fluid source or a compressed gas source shall include the following:

(1) Where the reserve source is a compressed gas source, the reserve shall be equipped with the following:

(a) A cylinder manifold having not less than three gas cylinder connections or as otherwise required for an average of one day's gas supply

(b) A pressure switch to monitor the pressure in the cylinder manifold

(2) Where the reserve source is a second cryogenic fluid vessel, the reserve tank shall be equipped with the following:

(a) An actuating switch or sensor to monitor the internal tank pressure

(b) A contents gauge to monitor the liquid level

(3) Where the reserve source is either a cryogenic fluid or compressed gas source, a check valve shall be provided to prevent backflow into the reserve system.

[55:17.3.3}

5.1.3.5.14.3.4 Bulk cryogenic liquid sources shall include automatic means to provide the following functions:

(1) When the main supply is supplying the system, the reserve supply shall be prevented from supplying the system until the main supply is reduced to a level at or below the reserve activation pressure.

(2) When the main supply cannot supply the system, the reserve supply shall automatically begin to supply the system.

(3) Where there is more than one main supply vessel, the system shall operate as follows for primary, secondary, and reserve operation:

(a) If provided with two liquid container headers, one cryogenic liquid header shall be the primary and the other shall be the secondary, with either being capable of either role.

(b) If provided with one liquid container header and one gas cylinder header (i.e., a hybrid arrangement), the liquid container header shall be the primary and the gas cylinder header shall be the secondary.

3

(c) When the primary header is supplying the system, the secondary header shall be prevented from supplying the system.

(d) When the primary header is depleted, the secondary header shall automatically begin to supply the system.

(4) Where there are two or more cryogenic vessels, they shall be permitted to alternate (e.g., on a timed basis) in the roles of primary, secondary, and reserve, provided that an operating cascade (i.e., primary–secondary–reserve) is maintained at all times.

(5) Where a cryogenic vessel is used as the reserve, the reserve vessel shall include a means to conserve the gas produced by evaporation of the cryogenic liquid in the reserve vessel and to discharge the gas into the line upstream of the final line regulator assembly.

[55:17.3.4] 5.1.3.5.14.4 Main Supply System. The main supply vessel for a cryogenic fluid central supply system shall be a cryogenic storage tank. [55:17.4] 5.1.3.5.14.5 Reserve Supply System. 5.1.3.5.14.5.1 A CMG reserve supply system shall consist of either of the following:

(1) A secondary cryogenic vessel

(2) A high-pressure compressed gas source

[55:17.5.1]

5.1.3.5.14.5.2 A cryogenic source reserve supply shall have a switch or sensor to monitor the tank pressure. [55:17.5.2] 5.1.3.5.14.5.3 A compressed gas reserve supply shall meet the following requirements:

(1) It shall be manifolded with no fewer than three gas cylinders.

(2) It shall have a pressure switch or sensor to monitor the contents using manifold pressure.

(3) It shall have a check valve to prevent backflow into the system.

(4) It shall have a check valve at each connection on the cylinder header to minimize loss of gas from the reserve system.

[55:17.5.3]

5.1.3.5.14.6 Cryogenic Fill System. Cryogenic fluid central supply systems shall include a fill mechanism consisting of the following components:

(1) A nonremovable product-specific fill connection in compliance with CGA V-6, Standard Cryogenic Liquid Transfer Connection

(2) A means to cap and secure the fill connection inlet

(3) A check valve to prevent product backflow from the fill inlet

(4) A fill hose purge valve

(5) Supports that hold the fill piping off the ground

(6) A secure connection between the bulk tank and the fill piping

(7) Supports, as necessary, to hold the fill line in position during all operations associated with the filling procedure

[55:17.6]

5.1.3.5.14.7 Vaporizers. 5.1.3.5.14.7.1 Vaporizers used to convert cryogenic CMG to a gaseous state shall meet the following requirements:

4

(1) Vaporizers shall be permitted to operate by either ambient heat transfer or external thermal source (e.g., electric heater, hot water, steam).

(2) Vaporizers using a heat source other than ambient air shall be protected in the event of a loss of the energy source.

[55:17.7.1]

5.1.3.5.14.7.2 Vaporizers shall be designed to provide capacity for the customer’s use under the following conditions:

(1) Customer’s average and peak flows

(2) Local conditions (e.g., structures that obstruct air circulation or sunlight)

(3) Seasonal conditions (e.g., freeze periods)

[55:17.7.2]

5.1.3.5.14.7.3 A system design that uses switching vaporizers shall meet all of the following requirements:

(1) Valves shall be permitted to be manual or automatic.

(2) Valves and piping shall allow an operating vaporizer or an operating section of a vaporizer to be switched to a nonoperating condition for deicing.

(3) The system design shall provide continuous flow of CMG to the health care facility during vaporizer switchover.

(4) The system design shall provide continuous flow of CMG to the health care facility if vaporizer switchover fails.

[55:17.7.3]

5.1.3.5.14.7.4 Where a vaporizer uses an external thermal source, the flow of the CMG shall be unaffected by the loss of the external thermal source by one of the following methods:

(1) Reserve ambient heat transfer vaporizers sized for at least one day’s average supply and piped so that the flow of the CMG is unaffected by flow stoppage through the external thermal source vaporizer

(2) A noncryogenic source capable of providing at least one day’s average supply

[55:17.7.4]

5.1.3.5.14.7.5 Where vaporizers are used in the reserve system, they shall be as follows:

(1) Sized by the supplier to provide a source of vaporized CMG from the reserve bulk liquid storage vessel during times when the reserve system is operational

(2) Able to provide a flow rate equal to at least that of the main system vaporizer(s); however, the duration of flow might be different

(3) Indirectly heated by ambient air

[55:17.7.5]

5.1.3.5.14.7.6 Low-temperature protection systems that interrupt or reduce flow shall not be used on the reserve system of cryogenic fluid central supply systems. [55:17.7.6] 5.1.3.5.14.8 High-Pressure Manifolds. 5.1.3.5.14.8.1 Manifold assemblies shall be fit for service and shall have supports that are independent of the cylinders. [55:17.8.1] 5.1.3.5.14.8.2

5

Cylinders on the manifold shall be secured against movement. [55:17.8.2] 5.1.3.5.14.8.3* Cylinders on the manifold shall have the same service pressure rating or the filled pressure of each cylinder shall not exceed the service pressure rating of the lowest rated cylinder on the manifold. [55:17.8.3} A. 5.1.3.5.14.8.3 For example, 2400 psi (16,550 kPa) rated cylinders are not connected to the same manifold as 2015 psi (13,890 kPa) rated cylinders unless all cylinders, including the 2400 psi (16,550 kPa) cylinders, are filled no greater than 2015 psi (13,890 kPa) [55:A.17.8.3] 5.1.3.5.14.9 Pressure Control Devices. The final pressure control device assembly or assemblies shall not be fabricated on-site. [55:17.9] 5.1.3.5.14.10 Pressure Relief Devices. 5.1.3.5.14.10.1 Pressure relief devices (PRDs) shall meet the following requirements:

(1) PRDs shall have a relief pressure setting not higher than the maximum allowable working pressure (MAWP) of the component with the lowest working pressure rating in the portion of the system being protected.

(2) PRDs shall be of brass or bronze construction.

(3) PRDs shall be designed for the specific gas service.

(4) PRDs shall have the discharge turned down to prevent the entry of rain or snow.

(5) PRDs shall be designed in accordance with ASME B31.3, Pressure Process Piping.

[55:17.10.1]

5.1.3.5.14.10.2 PRDs shall have an identifier that contains the date of manufacture or test. [55:17.10.2] 5.1.3.5.14.10.3 The final line pressure relief valves shall be approved by a nationally recognized organization and shall have a relief capacity greater than or equal to the maximum throughput of the final line regulator. [55:17.10.3] 5.1.3.5.14.10.3.1 The pressure relief valve shall be set at 50 percent above the normal working pressure, but no higher than the MAWP, of the health care facility pipeline. [55:17.10.3.1] 5.1.3.5.14.10.3.2 The relief valve information shall be stamped either on the nameplate of the relief valve or on a permanently attached metal tag. [55:17.10.3.2] 5.1.3.5.14.11 Tubing and Valves. 5.1.3.5.14.11.1 New, hard-drawn Type K or L copper tube shall be used for all process piping. [55:17.11.1] 5.1.3.5.14.11.1.1 Tubing shall comply with ASTM B819, Standard Specification for Seamless Copper Tube for Medical Gas Systems. [55:17.11.1.1] 5.1.3.5.14.11.1.2 Tubing shall be capped and bear the marking OXY or MEDICAL or be otherwise packaged and labeled to indicate it is clean for oxygen service according to the supplier’s policy. [55:17.11.1.2] 5.1.3.5.14.11.2 Copper Tubing. 5.1.3.5.14.11.2.1 Instrumentation tubing shall be constructed of annealed copper tubing or seamless stainless steel tubing. [55:17.11.2.1] 5.1.3.5.14.11.2.2 Copper tubing shall comply with ASTM B88, Standard Specification for Seamless Copper Water Tube. [55:17.11.2.2] 5.1.3.5.14.11.3 Valves of quick-open or quarter-turn designs, such as ball or plug valves, shall not be permitted in the high-pressure portion of an oxygen piping system. [55:17.11.3] 5.1.3.5.14.11.4 Alternate Materials. 5.1.3.5.14.11.4.1* Alternate materials of construction for piping, tubing, valves, and instruments shall be permitted for installation at the request of the health care facility or the supplier. [55:17.11.4.1] 5.1.3.5.14.11.4.2 Technical documentation of alternate materials shall be submitted to the health care facility QA representative to demonstrate equivalency. [55:17.11.4.2]

6

5.1.3.5.14.12* Alarms. The cryogenic fluid central supply system shall have a local signal that visibly indicates the operating status of the equipment and an indicator at all master alarms under the following conditions:

(1) When, or at a predetermined set point before, the main supply reaches an average day's supply, indicating low contents

(2) When, or at a predetermined set point before, the reserve supply begins to supply the system, indicating reserve is in use

(3) When, or at a predetermined set point before, the reserve supply contents fall to one day's average supply, indicating low reserve

(4) If the reserve is a cryogenic vessel, when, or at a predetermined set point before, the reserve internal pressure falls too low for the reserve to operate properly, indicating reserve failure

(5) Where there is more than one main supply vessel, when, or at a predetermined set point before, the secondary vessel begins to supply the system, indicating changeover

[55:17.12]

A.5.1.3.5.14.12 The local signal arose from the simple need of a maintenance person to know what is going on with any given piece of source equipment. Note that it is not an alarm in the sense of a local or master alarm. It is simply an indicator, which might be a gauge, a flag, a light, or some other possible manifestation that allows a maintenance person to stand at the equipment and know what conditions are present (e.g., which header of cylinders is in service). The elements to be displayed are typically those that will also be monitored at the master alarm, but the local signal is visible at the equipment rather than remotely. [55:A.17.12]


5.1.3.5.14.2

Bulk cryogenic liquid systems shall have the following protections:

(1) Be installed in accordance with NFPA 55

(2) Be installed in accordance with the mandatory requirements in CGA M-1, Standard for Medical GasSupply Systems at Health Care Facilities

(3) Have a minimum work space clearance of 3 ft (1 m) around three sides of the storage container,three sides of the vaporizer(s), and the cabinet opening or front side of the pressure regulatingmanifold for system maintenance and operation.


Storage vessels and vaporizers can be easily serviced with three sides of clearance around them. (As long as some common sense is used to keep the controls on the clearance sides). Real estate outside of a Hospital or other healthcare facility is had to come by and the additional 3 ft of clearance adds 9 sq ft of additional footprint to the central supply system for each vessels, vaps and cabinet location. That adds up quickly with multiple tanks and vaporizers on a concrete pad. This is a minimum code document. If the owners and manufacturers/suppliers require their equipment to have additional clearance, they can require that during installation.





Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: The code has been updated to extract material from new chapter 17, cryogenic fluid central supplysystems, in NFPA 55. See FR 1140 where the material from NFPA 55 has been added.

Note that the new 5.1.3.5.14.2.4 was revised to require 3 sides of 3 ft clearance. This breaks theextract for this section. Storage vessels and vaporizers can be easily serviced with three sides ofclearance around them. (As long as some common sense is used to keep the controls on theclearance sides). Real estate outside of a Hospital or other healthcare facility is hard to come by andthe additional 3 ft of clearance adds 9 sq ft of additional footprint to the central supply system for eachvessels, vaps and cabinet location. That adds up quickly with multiple tanks and vaporizers on aconcrete pad. This is a minimum code document. If the owners and manufacturers/suppliers requiretheir equipment to have additional clearance, they can require that during installation.


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Public Input No. 148-NFPA 99-2018 [ Section No. 5.1.3.5.15 [Excluding any Sub-

Sections] ]

Emergency oxygen supply connections (EOSCs) shall be installed to allow connection of a temporaryauxiliary source of supply for emergency or maintenance situations where either of the following conditionsexist:

(1) The bulk liquid system or cryogenic liquid fluid central supply system or micro-bulk cryogenic liquidsystem is outside of and remote from the building that the oxygen supply serves, and there is noconnected in-building oxygen reserve sufficient for one average day’s supply. (See 5.1.3.5.16 forrequirements for such reserves.)

(2) Multiple freestanding buildings are served from a single oxygen source such that damage to theinterconnecting oxygen line could result in one or more buildings losing oxygen supply, in which caseeach building is required to be provided with a separate emergency connection.


Updated to use term "cryogenic fluid central supply systems" and to apply to bulk liquid systems.





Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: Updated to use term "cryogenic fluid central supply systems" and to apply to bulk liquid systems.


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(8) The EOSC shall have a connection so that the temporary oxygen supply has a means to relay signals tothe facilities master alarms.


This would guarantee that the temporary supply is monitored.


Submitter Full Name: Neil Gagné

Organization: Wm. G. Frank Medical Gas Testing & Consulting LLC

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: Monitoring temporary supply in use is essential to patient safety and the requirements for connectionpoints will facilitate for this. The facility’s emergency operations plan should address how the facilitywill monitor the temporary supply while in use.


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5.1.3.6.3.1 Location.

Medical air compressor systems shall be located per 5.1.3.3 as follows:

(1) Indoors in a dedicated mechanical equipment area, adequately ventilated and with any required utilities(e.g., electricity, drains, lighting)

(2) In a room ventilated per 5.1.3.3.3.3

(3) For air-cooled equipment, in a room designed to maintain the ambient temperature range asrecommended by the manufacturer

(4) Medical air compressor systems shall not be installed in refrigerant machinery rooms, with purgeexhaust systems.


Loss of access to the medical air equipment on initiation of a refrigerant purge exhaust. These rooms are not always proper conditioned. In many cases doors are left open during the day to help with ventilation. Over time medical air equipment will deteriorate from elevated temperatures, humidity, and particulate infiltration. Refrigerant rooms are expanded over time, with the addition of patient towers. Eventually there would be major construction around med air equipment.



Organization: ACHA

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The proposed language is too specific to an individual situation. It is unclear what a refrigerantmachinery room is or what a purge exhaust system does. It is unclear if this is common enough of anissue to prescriptively address.


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Public Input No. 219-NFPA 99-2018 [ New Section after 5.1.3.6.3.11(H) ]


I. Medical air intake shall be labeled per 5.1.11.1 with any method that would distinguish them as a medicalair intake.


It would allow hospital staff and contractors to easily locate and identify this critical component of the system.



Organization: Wm. G. Frank Medical Gas Testing & Consultingf LLC

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: This revision will allow hospital staff and contractors to easily locate and identify this criticalcomponent of the system. Specifics for this have been added to 5.1.11.


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Public Input No. 377-NFPA 99-2018 [ Section No. 5.1.3.6.3.14(A) ]

(A) General.

(1) Medical air reconstituted from oxygen USP and nitrogen NF, produced using proportioning system(s),shall be required to meet the following:

(2) The quality of medical air shall be in accordance with 5.1.3.6.1 .

(3) The system shall be capable of supplying this quality of medical air, per 5.1.3.6.1 , over the entirerange of flow.

(4) The system shall produce medical air with an oxygen content of 19.5 percent to 23.5 percent.

(5) The medical air shall be cleared for marketing by the FDA or approved by the FDA.

(6) The medical air proportioning system shall operate automatically.

(7) The mixture shall be analyzed continuously, and a recording capability shall be provided (e.g., via dataport).

(8) The analyzing system specified in 5.1.3.6.3.14(A)(3) shall be a dedicated and an independent analyzerused to control the medical air proportioning system.

(9) If the mixture goes out of specification, an alarm shall be activated automatically, the primary medicalair proportioning system shall be disconnected, and the reserve supply shall be activated.

(10) The system shall be arranged such that manual intervention is necessary to correct the composition ofthe mixture before reconnecting the medical air proportioning system to the health care facility pipelinesystem.

(11) If dedicated sources of oxygen USP and nitrogen NF supply the medical air proportioning system,reserve sources for the oxygen and nitrogen shall not be required.

(12) If dedicated sources of oxygen USP and nitrogen NF supply the medical air proportioning system, theyshall not be used as the reserves for oxygen and nitrogen systems supplying the pipelines of the healthcare facility.

(13)

(14) A risk analysis and approval from the authority having jurisdiction shall be required.

(15) See Figure xxx, Appendix A for typical medical air proportioning system configurations.


This section was introduced in NFPA 99, 2012 edition. There are no illustrations of this system shown in NFPA 99, 2015 edition. We are headed to the 2018 release of NFPA 99. It would be helpful to show illustrations.



Organization: ACHA

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

* If the sources of oxygen USP and nitrogen NF that supply the medical air proportioning system arethe same sources that supply the health care facility, engineering controls shall be provided to preventcross contamination of oxygen and nitrogen supply lines, as provided in 5.1.3.5.8.


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Committee Statement

Resolution: No figure was provided as suggested.


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Public Input No. 376-NFPA 99-2018 [ Section No. 5.1.3.7.1 [Excluding any Sub-Sections]

]

Medical–surgical vacuum central supply systems shall be located per 5.1.3.3 as follows:

(1) Indoors in a dedicated mechanical equipment area, adequately ventilated and with any required utilities

(2) In a room ventilated per 5.1.3.3.3.3

(3) For air-cooled equipment, in a room designed to maintain the ambient temperature range asrecommended by the equipment manufacturer

(4) Medical-sugical vacuum central supply systems shall not be located in refrigerant machinery rooms,with purge exhaust systems .


Loss of access to the medical surgical vacuum equipment on initiation of a refrigerant purge exhaust. These rooms are not always proper conditioned. In many cases doors are left open during the day to help with ventilation. Over time medical air equipment will deteriorate from elevated temperatures, humidity, and particulate infiltration. Refrigerant rooms are expanded over time, with the addition of patient towers. Eventually there would be major construction around medical vacuum equipment.



Organization: ACHA

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The proposed language is too specific to an individual situation. It is unclear what a refrigerantmachinery room is or what a purge exhaust system does. It is unclear if this is common enough of anissue to prescriptively address.


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5.1.3.7.4 Vacuum Filtration.

Central supply systems for vacuum shall be provided with inlet filtration with the following characteristics:

(1) Filtration shall be at least duplex to allow one filter to be exchanged without impairing vacuum system

(2) Filtration shall be located on the patient side of the vacuum producer.

(3) Filters shall be efficient to 0.03 μ and 3µ and 99.97 percent HEPA or better, per DOE-STD-3020.

(4) Filtration shall be sized for 100 percent of the peak calculated demand while one filter or filter bundle isisolated.

(5) It shall be permitted to group multiple filters into bundles to achieve the required capacities.

(6) The system shall be provided with isolation valves on the source side of each filter or filter bundle andisolation valves on the patient side of each filter or filter bundle, permitting the filters to be isolatedwithout shutting off flow to the central supply system.

(7) A means shall be available to allow the user to observe any accumulations of liquids.

(8) A vacuum relief petcock shall be provided to allow vacuum to be relieved in the filter canister duringfilter replacement.

(9) Filter elements and canisters shall be permitted to be constructed of materials as deemed suitable bythe manufacturer.

(10) In normal operation, one filter or filter bundle shall be isolated from the system to be available forservice should a blockage in the operating filter occur or rotation of the filters be desired after filterelement exchange.


The earlier citation was incorrect. DOE and HEPA specifications are for 0.3 micron, not 0.03




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: This section has been revised to exempt liquid ring pumps from the filtration requirements. Thecommittee was provided with research that indicate that technology has been tested to effectivelydemonstrate that carryover is handled safely without additional filtration. The research includedintensive testing on liquid ring vacuum pumps and compressors to determine the ability of thetechnology to scrub the gas stream of contaminants. These vacuum pumps demonstrated the abilityof the technology to eliminate and flush any contaminants down the drain.

Item (3) has been revised as the earlier citation was incorrect. DOE and HEPA specifications are for0.3 micron, not 0.03


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5.1.3.7.4 Vacuum Filtration.

Central supply systems for vacuum shall , other than liquid ring pumps, shall be provided with inletfiltration with the following characteristics:

(1) Filtration shall be at least duplex to allow one filter to be exchanged without impairing vacuum system

(2) Filtration shall be located on the patient side of the vacuum producer.

(3) Filters shall be efficient to 0.03 μ and 99.97 percent HEPA or better, per DOE-STD-3020.

(4) Filtration shall be sized for 100 percent of the peak calculated demand while one filter or filter bundle isisolated.

(5) It shall be permitted to group multiple filters into bundles to achieve the required capacities.

(6) The system shall be provided with isolation valves on the source side of each filter or filter bundle andisolation valves on the patient side of each filter or filter bundle, permitting the filters to be isolatedwithout shutting off flow to the central supply system.

(7) A means shall be available to allow the user to observe any accumulations of liquids.

(8) A vacuum relief petcock shall be provided to allow vacuum to be relieved in the filter canister duringfilter replacement.

(9) Filter elements and canisters shall be permitted to be constructed of materials as deemed suitable bythe manufacturer.

(10) In normal operation, one filter or filter bundle shall be isolated from the system to be available forservice should a blockage in the operating filter occur or rotation of the filters be desired after filterelement exchange.



NFPA_Pipe_Comm_Ltr_Vac_Filtration.pdf

ADLittle_Rpt.pdf AD Little Testing Report


The NFPA Technical Committee on Piping Systems recently incorporated Section 5.1.3.7.4 into the NFPA 99 Health Care and Facilities Code, 2018. This section added requirements for vacuum filtration at the system source, indicating that central supply systems for vacuum shall be provided with inlet filtration.

This was done to prevent live viruses and bacteria from entering and passing through the vacuum source unabated allowing, perhaps deadly, pathogens out to the public. Though some testing has been done, a full study is not known at this time, indicating the concern is not real and therefore filtration is for public perception. Although many international standards incorporate vacuum filtration within their code, there is no confirmation on the value of these vacuum inlet filters. Furthermore, vacuum is considered to be naturally desiccating, deactivating any bacteria in the pipeline. Copper piping used in these installations has also been proven to be a natural bactericide and has even been registered as the first solid antimicrobial material by the U.S. Environmental Protection Agency.

The cost to add filtration is not negligible and includes initial and annual costs, labor to maintain, and the additional power required to draw gas through the filter. This pressure drop requires higher vacuum levels and longer run times. Though it is potentially insignificant when looking at each system individually, when considering all medical vacuum systems, there is an increase in cost to an already overburdened industry.

Assuming the general public’s impression that there has to be some infectious germs finding their way to the exhaust, the Sherman Engineering Company requests consideration is given to a technology that has been tested to effectively demonstrate that carryover is handled safely without additional filtration. Nash Engineering contracted Arthur D. Little Company to conduct intensive testing on liquid ring vacuum pumps and compressors to


82 of 192 11/2/2018, 10:45 AM

determine the ability of the technology to scrub the gas stream of contaminants. These vacuum pumps demonstrated the ability of the technology to eliminate and flush any contaminants down the drain. A copy of the report is attached.



Organization: Sherman Engineering Company

Affiliation: Sherman Engineering Company

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: This section has been revised to exempt liquid ring pumps from the filtration requirements. Thecommittee was provided with research that indicate that technology has been tested to effectivelydemonstrate that carryover is handled safely without additional filtration. The research includedintensive testing on liquid ring vacuum pumps and compressors to determine the ability of thetechnology to scrub the gas stream of contaminants. These vacuum pumps demonstrated the abilityof the technology to eliminate and flush any contaminants down the drain.

Item (3) has been revised as the earlier citation was incorrect. DOE and HEPA specifications are for0.3 micron, not 0.03


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June 18, 2018 NFPA Technical Committee Attn: James K. Lathrop, Chair Koffel Associates, Inc., CT To The Technical Committee of Piping Systems: The NFPA Technical Committee on Piping Systems recently incorporated Section 5.1.3.7.4 into the NFPA 99 Health Care and Facilities Code, 2018. This section added requirements for vacuum filtration at the system source, indicating that central supply systems for vacuum shall be provided with inlet filtration. This was done to prevent live viruses and bacteria from entering and passing through the vacuum source unabated allowing, perhaps deadly, pathogens out to the public. Though some testing has been done, a full study is not known at this time, indicating the concern is not real and therefore filtration is for public perception. Although many international standards incorporate vacuum filtration within their code, there is no confirmation on the value of these vacuum inlet filters. Furthermore, vacuum is considered to be naturally desiccating, deactivating any bacteria in the pipeline. Copper piping used in these installations has also been proven to be a natural bactericide and has even been registered as the first solid antimicrobial material by the U.S. Environmental Protection Agency. The cost to add filtration is not negligible and includes initial and annual costs, labor to maintain, and the additional power required to draw gas through the filter. This pressure drop requires higher vacuum levels and longer run times. Though it is potentially insignificant when looking at each system individually, when considering all medical vacuum systems, there is an increase in cost to an already overburdened industry. Assuming the general public’s impression that there has to be some infectious germs finding their way to the exhaust, the Sherman Engineering Company requests consideration is given to a technology that has been tested to effectively demonstrate that carryover is handled safely without additional filtration. Nash Engineering contracted Arthur D. Little Company to conduct intensive testing on liquid ring vacuum pumps and compressors to determine the ability of the technology to scrub the gas stream of contaminants. These vacuum pumps demonstrated the ability of the technology to eliminate and flush any contaminants down the drain. A copy of the report is attached. Accordingly, Sherman Engineering recommends the following change to the code:

5.1.3.7.4 Vacuum Filtration. Central supply systems for vacuum, other than liquid ring pumps, shall be

provided with inlet filtration with the following characteristics:

N (A) 5.1.3.7 It has been demonstrated that when using liquid ring vacuum pump technology with a

purge, no inlet filtration will be necessary however can be added at the discretion of the owner.

Sincerely,

The Sherman Engineering Company

Mark T. Franklin, P.E.



5.1.3.7.7.3 (2) Vacuum Exhaust shall be labeled per 5.1.11.1 with any method that would distinguish themas a vacuum exhaust.


It would allow hospital staff and contractors to easily locate and identify this critical component of the vacuum system.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: Labeling exhaust will allow hospital staff and contractors to easily locate and identify this criticalcomponent of the vacuum system. Section 5.1.11 has been revised to include specifics for thislabeling.


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5.1.3.8.1.2

If WAGD is produced by the medical–surgical vacuum source, the following shall apply:

(1) The medical–surgical vacuum source shall comply with 5.1.3.7.

(2) The total concentration of oxidizers ( oxygen and nitrous oxide) shall be maintained below23.6 percent, or the vacuum pump shall comply with 5.1.3.8.2.1.

(3) The medical–surgical vacuum source shall be sized to accommodate the additional volume.



99_PC4.pdf 99_PC4


NOTE: This Public Input appeared as “Reject but Hold” in Public Comment No. 4 of the (A2017) Second Draft Report.

The most common oxidizers that are present in combined use vacuum pump systems include gases such as nitrous oxide (N2O) and carbon dioxide (CO2). According to Wikipedia, N2O will decompose exothermically into nitrogen and oxygen, at a temperature of approximately 1070 °F, while CO2 requires much higher temperatures. If a system is exposed to such an environment, there are likely plenty of other problems to worry about. Not to mention, the cost of monitoring oxidizers is much more expensive than simply monitoring the oxygen concentration. So is dedicating an entire vacuum pump system that is required to be made from inert materials specifically WAGD purposes. The ability for health care facilities to monitor their vacuum pumps oxygen concentration would permit a similar standard for safety as well as offer a much more economical means for providing the same service. This could also more easily apply to existing systems, making them much safer for combined use scenarios. Any feedback would be appreciated. Thank you for your time.


Submitter Full Name: Tc On Hea-Pip

Organization: NFPA

Street Address:

City:

State:

Zip:

Submittal Date: Tue Jan 23 09:35:21 EST 2018

Committee: HEA-PIP

Committee Statement


Statement: The concern this section addresses is the potential for an oxygen enriched atmosphere. Nitrous oxideat the concentration listed does not necessarily create such an atmosphere. While nitrous oxide is anoxidizer, it does not get to that point until reaching temperatures far exceeding those that would befound in a pump.


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5.1.3.8.1.7

If WAGD is produced by a venturi, the following shall apply:

(1) The venturi shall not be user-adjustable (i.e., require the use of special tools).

(2) The venturi shall be driven using water, inert gas, instrument air medical support gas , or otherdedicated air source.

(3) Medical air shall not be used to power the venturi.


Medical support gas by definition is instrument air and or Nitrogen.



Public Input No. 269-NFPA 99-2018 [Section No. 3.3.20]




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: This section permits the use of inert gas and instrument air which are the medical support gases. Theproposed revision does not clarify the language for the user.


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5.1.4.1.6 Valve Types.

New or replacement valves shall be permitted to be of any type as long as they meet the followingconditions:

(1) They have a minimum Cv factor in accordance with either Table 5.1.4.1.6(a) or Table 5.1.4.1.6(b).

Table 5.1.4.1.6(a) Positive Pressure Gases

Valve Size (in.) Minimum Cv (full open)

½ 17

¾ 31

1 60

1¼ 110

1½ 169

2 357

2½ 390

3 912

4 1837

Table 5.1.4.1.6(b) Vacuum and WAGD


¾ 31

1 60

1¼ 110

1½ 169

2 357

2½ 196

3 302

4 600

5 1022

6 1579

8 3136

(2) They use a quarter turn to off.

(3) They are constructed of materials suitable for the service.

(4) They are provided with copper tube extensions by the manufacturer for brazing or with corrugatedmedical tubing (CMT) fittings.

(5) They indicate to the operator if the valve is open or closed.

(6) They permit in-line serviceability.

(7) They are cleaned for oxygen service by the manufacturer if used for any positive-pressure service

(8) They shall have threaded purge points of 1/8 in . NPT on the upstream and downside (IncludingSource Valves).


This will allow all new sources and to be tested without the potential of introducing contaminants and particulate into the piping


87 of 192 11/2/2018, 10:45 AM




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution:

Statement: A 1/2" valve size and accompanying Cv have been added to the table to address WAGD which ispermitted to have this size.

Item (8) has been added so as to allow all new sources and to be tested without the potential ofintroducing contaminants and particulate into the piping

Item (9) has been added to establish a minimum pressure rating which corresponds to the pressureset point of the relief valve installed on the system. Previously, the code allowed a valve with anypressure rating because it was not specified.


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Table 5.1.4.1.6(a) Positive Pressure Gases


½ 17

¾ 31

1 60

1¼ 110

1½ 169

2 357

2½ 390

3 912

4 1837

Table 5.1.4.1.6(b) Vacuum and WAGD


¾ 31

1 60

1¼ 110

1½ 169

2 357

2½ 196

3 302

4 600

5 1022

6 1579

8 3136






(7) They are cleaned for oxygen service by the manufacturer if used for any positive-pressure service.

(8) They have a minimum 300 psi working pressure rating.


Currently the code allows a valve with any pressure rating (even zero) to be used. This change establishes a minimum pressure rating which corresponds to the highest possible pipeline testing pressure (1.5 x normal line pressure) of the N2 and Instrument Air pipelines.


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Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution:





90 of 192 11/2/2018, 10:45 AM





Table 5.1.4.1.6(a) Positive Pressure Gases and WAGD


½ 17

¾ 31

1 60

1¼ 110

1½ 169

2 357

2½ 390

3 912

4 1837

Table 5.1.4.1.6(b) Vacuum

and WAGD


¾ 31

1 60

1¼ 110

1½ 169

2 357

2½ 196

3 302

4 600

5 1022

6 1579

8 3136






(7) They are cleaned for oxygen service by the manufacturer if used for any positive-pressure service.


Changes to 5.1.10.11.1.5 would allow for 1/2" WAGD piping. This is clarification of the table. Vacuum valve should remain at 3/4.


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Submitter Full Name: Anthony Lowe

Organization: Allied Hospital Systems

Street Address:

City:

State:

Zip:

Submittal Date: Sun May 20 12:19:23 EDT 2018

Committee: HEA-PIP

Committee Statement

Resolution:





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5.1.4.6.1

All station outlets/inlets shall be supplied through a zone valve, which shall be placed as follows:

(1) It is installed so that a wall intervenes between the valve and the outlets/inlets that it controls.

(2)

(3) It is installed where it is visible and accessible at all times.

(4) It is not installed where it can be hidden from plain view, such as behind normally open or normallyclosed doors.

(5)

(6) It is not installed ina room with the station outlets/inlets that it controls.

(7) It is not installed in rooms, areas, or closets that can be closed or locked.


Only trying to delete 5 because (1) provides the necessary protection




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The submitter did not provide substantiation supporting his comment that item 1 provides theadequate protection

* It is readily operable from a standing position.


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5.1.4.6.1

All station outlets/inlets shall be supplied through a zone valve, which shall be placed as follows:a. It is installed so that a wall intervenes between the valve and the outlets/inlets that it controls.

b. It is not installed in a room with the station outlets/inlets that it controls and shall be located within themeans of egress.

c. It is installed at a minimum of 20 feet from the nearest outlet/inlet.

(1)

(2) It is installed where it is visible and accessible at all times.

(3) It is not installed where it can be hidden from plain view, such as behind normally open or normallyclosed doors.

(4) It is not installed ina room with the station outlets/inlets that it controls.

(5) It is not installed in rooms, areas, or closets that can be closed or locked.

(6) It is placed to meet one of the following:


Just trying to get it right. There is multiple options available based on new design concepts, this will allow some flexibility in the placement of the ZVB while still remaining safe.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The text as submitted is confusing. 20 ft seems to be an arbitrary number. The zone valve needs tobe located outside of the room.

* It is readily operable from a standing position.


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5.1.4.6.2

A zone valve in each medical gas or vacuum line shall be provided for each Category 1 space andanesthetizing location for moderate sedation, deep sedation, or general anesthesia specific for theoccupancy. These zone valves shall be located as follows:

(1) They are installed immediately outside the area controlled.

(2) They are readily accessible visable and accessible in an emergency.


this will allow wheeled items in front of valves as long as they do not block the view.




Street Address:

City:

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Zip:


Committee: HEA-PIP

Committee Statement


Statement: Revised to keep consistent language throughout 5.1.4.6.


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5.1.4.10 Auxiliary Source Connection. All cryogenic fluid

central supply systems shall be provided with an auxiliary

source connection point of the same size as the main line,

which shall be located immediately on the patient side of the

source valve.

5.1.4.10.1 The connection shall consist of a tee, a valve, and a

removable plug or cap.

5.1.4.10.2 The auxiliary source connection valve shall be

normally closed and secured.


See PI-149 for moving section of code that applies to piping downstream of the source valve.









Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: Move this material to a new section 5.1.4.10 where it can apply to piping downstream of the sourcevalve. Current location of the requirement is not correct because it applies to piping upstream of thesource valve.


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5.1.4.9 In-Line Check Valves.

New or replacement check valves shall be as follows:

(1) They shall be of brass or bronze construction.

(2) They shall have brazed extensions.

(3) They shall have in-line serviceability.

(4) They shall not have threaded connections.

(5) They shall have threaded purge points of 1⁄8 in. NPT.

(6) They shall have minimum Cv factors as per table 5.1.4.9.1

Table 5.1.4.9.1 Minimum Cv factor for check valves:

Size Minimum Cv (GPM water @ 1 psi pressure drop)

0.5" 37

0.75 37

1.0" 65

1.25" 83

1.5" 145

2.0" 350

2.5" 590

3.0" 920

4.0" 1,400


This table establishes a minimum measure of capability of the valve to pass flow. No minimum flow requirement had been established in prior editions of the code. This should be included.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The proposed language to have minimum Cv criteria for check valves is a good idea. It is unclearhowever , what the difference in the proposed Cv values are as compared to those associated with allvalves. For example, is it different from the other tables at GPM water @ 1 psi pressure drop, or isthat the standard?


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5.1.4.9 In-Line Check Valves.

New or replacement check valves shall be as follows:

(1) They shall be of brass or bronze construction.

(2) They shall have brazed extensions.

(3) They shall have in-line serviceability.

(4) They shall not have threaded connections.

(5) They shall have threaded purge points of 1⁄8 in. NPT.

(6) per P.I. 291

(7) They shall have a maximum velocity which does not exceed the manufacturer's recommendedmaximum velocity


Exceeding the maximum allowable velocity of check valves could result in damage to or decreased lifeof the valve. Drawing this to the attention of the design engineer is important. This should help prevent design created system performance issues.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: Exceeding the maximum allowable velocity of check valves could result in damage to or decreasedlife of the valve. Drawing this to the attention of the design engineer is important. This should helpprevent design created system performance issues.


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5.1.6.2

The leakage from a completed manufactured assembly shall not exceed 0.5 percent 006 cc/sec of thestarting pressure when tested at 20 percent above operating pressure for pressure pipelines and 635 mm(25 in.) HgV shall not exceed .002 cc/sec for vacuum and WAGD systems [e.g., 2 kPa (0.3 psi) starting at415 kPa (60 psig), 0.3 mm (0.125 in.) HgV starting at when started at 635 mm (25 in.) HgV] .


This leak rate is a non-subjective value as previous leak rates left it up to the manufacturer to determine what test volume the leak rate was meant for. It is also a leak rate that can be performed on a production basis by a manufacturer using pressure decay technology.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: This leak rate is a non-subjective value as previous leak rates left it up to the manufacturer todetermine what test volume the leak rate was meant for. It is also a leak rate that can be performedon a production basis by a manufacturer using pressure decay technology.


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5.1.8.2.3.1

Gas-specific demand check fittings shall not be required on zone valve pressure indicators.


Having demand checks on the ZVB will facilitate in replacing the gauges on a ZVB without disruption to the medical gas system. Shutting down critical care areas like ICU, CCU, and NICU to replace a ZVB gauge is a challenge for the facility.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: While the proposed change would allow for improved operational efficiencies, NFPA 99 is a minimumcode. Facilities have the option to do this in if they so choose.


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5.1.9.1 General.

All master, area, and local alarm systems used for medical gas and vacuum systems shall include thefollowing:

(1) Separate visual indicators for each condition monitored, except as permitted in 5.1.9.5.2 for localalarms that are displayed on master alarm panels

(2) Visual indicators that remain in alarm until the situation that has caused the alarm is resolved

(3) Cancelable audible indication of each alarm condition that produces a sound with a minimum level of80 dBA at 0.92 m (3 ft)

(4) Means to indicate a lamp or LED failure and audible failure

(5) Visual and audible indication that the communication with an alarm-initiating device is disconnected

(6) Labeling of each indicator, indicating the condition monitored

(7) Labeling of each alarm panel for its area of surveillance

(8) Reinitiation of the audible signal if another alarm condition occurs while the audible alarm is silenced

(9) Power for master, area alarms, sensors, and switches from the life safety branch of the essentialelectrical system as described in Chapter 6

(10) Power for local alarms, dew point sensors, and carbon monoxide sensors permitted to be from thesame essential electrical branch as is used to power the air compressor system

(11) Where used for communications, wiring from switches or sensors that is supervised or protected asrequired by 517.30(C)(3) of NFPA 70 for life safety and critical branches circuits in which protection isany of the following types:

(12) Conduit

(13) Free air

(14) Wire

(15) Cable tray

(16) Raceways

(17) Communication devices that do not use electrical wiring for signal transmission will be supervised suchthat failure of communication shall initiate an alarm.

(18) Assurance by the responsible authority of the facility that the labeling of alarms, where room numbersor designations are used, is accurate and up-to-date

(19) Provisions for automatic restart after a power loss of 10 seconds (e.g., during generator start-up)without giving false signals or requiring manual reset

(20) Alarm switches/sensors installed so as to be removable and accessible for service and testing.


Installers sometimes install switches/sensors in areas which are not accessible. These pieces of equipment must be tested periodically and occasionally serviced or replaced. This is not possible if they are not accessible.




Street Address:

City:


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State:

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Committee: HEA-PIP

Committee Statement


Statement: Installers sometimes install switches/sensors in areas which are not accessible. These pieces ofequipment must be tested periodically and occasionally serviced or replaced. This is not possible ifthey are not accessible.


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Public Input No. 321-NFPA 99-2018 [ Section No. 5.1.9.2.3.1(B) ]

(B)

The wiring between each mandatory alarm(s) and the initiating device(s) shall not utilize commonconductors that, if interrupted, would disable more than one signal.


It is not possible to limit the interruption to one signal. If more than one signal is wired into a mandatory alarm, from a control panel of the equipment being monitored and, a circuit board in the control panel fails all of the signals wired to the mandatory alarm from the control panel will be disabled. The same is true if the signal is coming from a high/low pressure switch. If the switch becomes inoperable both the high and low signals will be interrupted. In the same manner most of the master alarm circuit boards used for decades are five, eight, ten or sixteen signal point circuit boards. When one of these boards fails you have lost all of the signals wired to that circuit board.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: This section addresses common conductors rather than than devices such as are referenced in thesubstantiation. This language prevents the possibility of using the same wiring .


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(A)

Each of the mandatory alarms shall communicate independently to the initiating device(s) for each signal.


It is not possible to limit the interruption to one signal. If more than one signal is wired into a sending device, or the equipment being monitored’ s control panel has more than one signal originating from it and, a circuit board in the sending device or control panel fails, all of the signals wired to the sending device or wired from the equipment’s control panel will be disabled. In the same manner Most of the master alarm circuit boards are five, ten, or sixteen signal point circuit boards. When one of them fails you have lost all of the signals wired to that circuit board. The same is true if the signal is coming from a high/low pressure switch. If the switch becomes inoperable both the high and low signals will be interrupted.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: Removal of this section would allow for a single failure point for the non wired system. This is notallowed for traditional wired systems and the requirements for wireless need to provide the samelevel of surveillance.


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(B)

The means of communication between each mandatory alarm(s) and the initiating device(s) shall not utilizea common communication device that, if interrupted, would disable more than one signal other initiatingdevice(s) .


It is not possible to limit the interruption to one signal. If more than one signal is wired into a sending device, or the equipment being monitored’ s control panel has more than one signal originating from it and, a circuit board in the sending device or control panel fails all of the signals wired to the sending device or wired from the equipment’s control panel will be disabled. In the same manner Most of the master alarm circuit boards are five, ten, or sixteen signal point circuit boards. When one of them fails you have lost all of the signals wired to that circuit board. The same is true if the signal is coming from a high/low pressure switch. If the switch becomes inoperable both the high and low signals will be interrupted.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: This has been revised to show that the purpose of the requirement is that disabling signals from otherinitiating devices is what cannot be interrupted.


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5.1.9.2.4

Master alarm panels for medical gas and vacuum systems shall each include the following signals:

(1) Alarm indication when, or just before, changeover occurs in a medical gas system that is supplied by amanifold or other alternating-type bulk system that has as a part of its normal operation a changeoverfrom one portion of the operating supply to another

(2) Alarm indication for a bulk cryogenic liquid system fluid central supply system when the main supplyreaches one average day’s supply, indicating low contents

(3) Alarm indication when, or just before, the changeover to the reserve supply occurs in a medical gassystem that consists of one or more units that continuously supply the piping system while another unitremains as the reserve supply and operates only in the case of an emergency

(4) Alarm indication for cylinder reserve pressure low when the content of a cylinder reserve header isreduced below one average day’s supply

(5) For bulk cryogenic liquid systems For cryogenic fluid central supply systems , an alarm when or at apredetermined set point before the reserve supply contents fall to one average day’s supply, indicatingreserve low

(6) Where a cryogenic liquid storage unit is used as a reserve for a bulk supply system a cryogenic fluidcentral supply system , an alarm indication when the gas pressure available in the reserve unit is belowthat required for the medical gas system to function

(7) Alarm indication when the pressure in the main line of each separate medical gas system increases20 percent or decreases 20 percent from the normal operating pressure

(8) Alarm indication when the medical–surgical vacuum pressure in the main line of each vacuum systemdrops to or below 300 mm (12 in.) gauge HgV

(9) Alarm indication(s) from the local alarm panel(s) as described in 5.1.9.5.2 to indicate when one or moreof the conditions being monitored at a site is in alarm

(10) Medical air dew point high alarm from each compressor site to indicate when the line pressure dewpoint is greater than +2°C (+35°F)

(11) WAGD low alarm when the WAGD vacuum level or flow is below effective operating limits

(12) An instrument air dew point high alarm from each compressor site to indicate when the line pressuredew point is greater than −30°C (−22°F)

(13) Alarm indication if the primary or reserve production stops on a proportioning system

(14) When oxygen is supplied from an oxygen central supply system using concentrators (see 5.1.3.9), thefollowing signals shall be provided:

(a) For each concentrator unit used in the oxygen central supply system, an alarm indication thatoxygen concentration from that oxygen concentrator unit is below 91 percent

(b) For each oxygen concentrator unit used in the oxygen central supply system, an alarm indicationthat the isolating valve for that oxygen concentrator unit is closed and the unit is isolated

(c) For each cylinder header used as a source, an alarm indication that the header is in use

(d) For each cylinder header used as a source, an alarm indication that the cylinder contents arebelow one average day’s supply

(e) If the source in use changes because of a failure to appropriately supply the system, an alarmindication indicating an unexpected oxygen supply change has occurred

(f) An alarm indication that the pressure in the common line on the source side of the line pressurecontrols is low

(g) An alarm indication that the oxygen concentration from the supply system is below 91 percent



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Street Address:

City:

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Committee: HEA-PIP

Committee Statement




107 of 192 11/2/2018, 10:45 AM


5.1.9.5.2

The master alarm shall include at least one signal from the source equipment to indicate a problem with thesource equipment at this location . and meet the following:

(1) This master alarm signal shall activate when any of the required local alarm signals for thissource equipment activates.

(2) This master alarm signal shall activate when any of the manufactures local alarm signals for thissource equipment activates.


Manufactures of source equipment are designing systems that have additional alarm points beyond what is required. Any condition that activates an alarm on the source equipment should be connected to the master panel. Currently, you only have to connect the alarms that are required(assuming this is referencing the NFPA 99 requirements).

There is 2 "Shall" statements in this 5.1.9.5.2.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The current language does not prohibit activating the master alarm signal when the local alarmsignals recommended by manufacturer activate. As a minimum standard, they must activate whenone of the required signals activates as a minimum as these are the most critical to patient safety.


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5.1.10.2.3.1

If joined to the vacuum piping , shall meet the following requirements:

(1) WAGD system piping shall be connected at a minimum distance of 1.5 m (5 ft) from any vacuum inlet.

(2) If joined downstream/Source Side of the Vacuum Zone valve box, The WAGD system piping shall meetthe requirements of 5.1.9.4.


When WAGD is connected to the vacuum system and run through it's own ZVB there has been some confusion TJC and other surveyors of the area alarms. If WAGD is in it's own ZVB it can be difficult to determine if it is dedicated or tied into the vacuum system.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The committee has addressed this within revisions to 5.1.11.


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5.1.10.4.1.8

Brazing performed between bulk cryogenic liquid between cryogenic fluid central supply system vesselsand their vaporizers (i.e., subject to cryogenic exposure) shall be permitted to be brazed using BAg brazingalloy with flux by a brazer qualified to the mandatory requirements of CGA M-1, Standard for Medical GasSupply Systems at Health Care Facilities.







Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement




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5.1.10.4.2.3

The cut ends of the tube shall be permitted to be rolled smooth or deburred with a sharp, clean deburringtool, taking care to prevent chips from entering the tube.


The removal of the burr inside the pipe was a requirement for many editions. The permitted language entered when the alternative method of rolling smooth was added. This needs to be mandatory, not optional to eliminate copper particles from the piping.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: The removal of the burr inside the pipe was a requirement for many editions. The permitted languageentered when the alternative method of rolling smooth was added. This needs to be mandatory, notoptional to eliminate copper particles from the piping.


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5.1.10.4.3.11

Other aqueous cleaning solutions shall be permitted to be used for on-site recleaning permitted in5.1.10.4.3.10, provided that they are as recommended in the mandatory requirements of CGA G-4.1,Cleaning Equipment for Oxygen Service, and are listed in CGA O2-DIR, Directory of Cleaning Agents forOxygen Service .


CGA O2-DIR has been discontinued.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: CGA O2-DIR has been deleted from reference in this section since it has been discontinued.


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5.1.10.4.5* Nitrogen Purge. Inert Gas Purge. Operations requiring the use of inert gases shall beconducted with argon, nitrogen or other inert purge gas as required by the process with at leastthe following concentration and cleanliness:

(A) dry to -40°C (-40°F)

(B) less than 1% oxygen

(C) filtered to 1µ

(D) no appreciable odor

5.1.10.4.5.1

When brazing, joints shall be continuously purged with oil-free, dry nitrogen NF a continuous low flow ofinert purge gas shall continuously run through the joint to prevent the formation of copper oxide on theinside surfaces of the joint.

5.1.10.4.5.2

The source of the inert purge gas shall be monitored, and the installer shall be audibly alerted when thesource content is low.

5.1.10.4.5.3

The inert purge gas flow rate shall be controlled by the use of a pressure combined regulator and/ flowmeter , or combination thereof or flowmeter with control valve .

5.1.10.4.5.4

Pressure regulators alone shall not be used to control purge gas flow rates.

5.1.10.4.5.5

In order to ensure that all ambient air has been removed from the pipeline prior to brazing, an oxygenanalyzer shall be used to verify the effectiveness of the purge. The oxygen analyzer, when applied at theopen end of the line to be brazed, shall read below 1 percent oxygen concentration before brazing begins.

5.1.10.4.5.6

During and after installation, openings in the piping system shall be kept sealed to maintain a nitrogen aninert atmosphere within the piping to prevent debris or other contaminants from entering the system.

5.1.10.4.5.7

While a joint is being brazed, a discharge opening shall be provided on the opposite side of the joint fromwhere the inert purge gas is being introduced.

5.1.10.4.5.8

The flow of inert purge gas shall be maintained until the joint is cool to the touch.

5.1.10.4.5.9

After the joint has cooled, the purge discharge opening shall be sealed to prevent contamination of theinside of the tube and maintain the nitrogen inert atmosphere within the piping system.

5.1.10.4.5.10

The final brazed connection of new piping to an existing pipeline containing the system gas shall bepermitted to be made without the use of a nitrogen an inert gas purge.

5.1.10.4.5.11

After a final brazed connection in a positive pressure medical gas pipeline is made without a nitrogen aninert gas purge, an outlet in the immediate downstream zone of the affected portion(s) of both the new andexisting piping shall be tested in accordance with the final tie-in test in 5.1.12.4.9.

5.1.10.4.5.12*

When using the autogenous orbital welding process, joints shall be continuously purged inside and outsidewith inert purge gas(es) in accordance with the qualified welding procedure.


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There are now on the market small nitrogen concentrators which can produce gas equal to or better than Nitrogen NF in dryness, cleanliness and oxygen content. Such concentrators could save installers a great deal of hassle ordering, inventorying, hustling and returning cylinders for the purging operation. As written, the standard precludes the use of such technology.The proposal allows for such a method, as well as other purge gases which have been used.








Public Input No. 195-NFPA 99-2018 [Section No. 5.1.12.4.5.1(F)]






Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The removal of reference to nitrogen NF could increase the potential for gas impurities introduced tothe system during installation. This could also provide difficulties in doing comparative testing.


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5.1.10.7.1

Axially swaged, elastic strain preload fittings providing metal-to-metal seals,

having a temperature rating not less than 538°C (1000°F) and a pressure rating not less than 2070 kPa(300 psi), and

suitable for service at 2070 kPa (300 psig) and able to withstand temperature of 538 C (1000 F) and that,when complete, are permanent and nonseparable shall be permitted to be used to join copper or stainlesssteel tube.


5.1.10.11.3 medical gas piping shall not be installed in areas of excessive heat, open flame, or temperature in excess of 130F. Verifiers, Inspectors, and engineers sometimes get hung up on the 5.1.10.7.1 requirement of the temperature rating of 1,000F. That should be a 1,000F integrity test


Submitter Full Name: Jim Brusse

Organization: Lokring West Coast USA

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: 5.1.10.11.3 medical gas piping shall not be installed in areas of excessive heat, open flame, ortemperature in excess of 130F. Verifiers, Inspectors, and engineers sometimes get hung up on the5.1.10.7.1 requirement of the temperature rating of 1,000F. That should be a 1,000F integrity test. Atrademarked term has also been removed from this section.


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5.1.10.8 Threaded Fittings.

Threaded fittings shall meet the following criteria:

(1) They shall be limited to connections for pressure and vacuum indicators, alarm devices, gas-specificdemand check fittings, vacuum clean-outs, and source equipment on the source side of the sourcevalve.

(2) They shall be tapered pipe threads complying with ASME B1.20.1, Pipe Threads, General Purpose,Inch.

(3)


Vacuum clean out fittings are necessary to clean or unclog system piping. Without this allowance for threaded access ports, piping will have to be cut and dismantled to free blockages resulting in extended system outages. This fitting is brazed in-line and only the clean-out port is threaded.


Submitter Full Name: Jason D`Antona

Organization: Thompson Consultants, Inc.

Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The committee generally supports allowing vacuum cleanouts to be optionally installed in vacuumsystems. The current code allows these when brazed onto pipeline and simply has a threaded plug,but this can be better clarified. Since this is not truly a threaded fitting to the pipeline the suggestedlocation is not appropriate. The committee would welcome language in comment stage to betteraddress this as a separate issue.

* They shall be made up with polytetrafluoroethylene (PTFE) tape or other thread sealantrecommended for oxygen service, with sealant applied to the male threads only and care taken toensure sealant does not enter the pipe.


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5.1.10.10 Prohibited Joints.

The following joints shall be prohibited throughout medical gas and vacuum distribution pipeline systems:

(1) Flared and compression-type connections, including connections to station outlets and inlets, alarmdevices, and other components

(2) Other straight-threaded connections, including unions

(3) Pipe-crimping tools used to permanently stop the flow of medical gas and vacuum piping

(4) Removable and nonremovable push-fit fittings and crimping fittings that employ a quick assemblypush fit connector



99_PC45.pdf 99_PC45


NOTE: This Public Input appeared as “Reject but Hold” in Public Comment No. 45 of the (A2017) Second Draft Report.

This would not allow the use of propress fittings for joints.


Submitter Full Name: Tc On Hea-Pip

Organization: NFPA

Street Address:

City:

State:

Zip:

Submittal Date: Tue Jan 23 09:42:52 EST 2018

Committee: HEA-PIP

Committee Statement

Resolution: The submitted input provided no substantiation to support the change.


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5.1.10.11.1.4

Mains and branches in WAGD systems shall be not less than DN15 (NPS 1⁄2) (5⁄8 in. O.D.) size.


Currently there is no code requirement to state what minimum pipe size is on a WAGD system. A mechanical engineer designed a 1/2 WAGD pipe system for a facility. Upon verification found no code reference to dictate the pipe size of WAGD. The system did meet all required flow and vacuum level tests.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: Revised to add a code requirement to state what minimum pipe size is on a WAGD system. Systemswith 1/2 WAGD pipe system have been found upon verification meet all required flow and vacuumlevel tests.


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5.1.10.11.11.4

The brazing procedure qualification record and the record of brazer performance qualification shalldocument filler metal used, base metals, cleaning, joint clearance, overlap, internal inert purge gas andflow rate during brazing of coupon, and absence of internal oxidation in the completed coupon.


See 5.1.10.4.5




Street Address:

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Committee: HEA-PIP

Committee Statement



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Public Input No. 283-NFPA 99-2018 [ Section No. 5.1.11 [Excluding any Sub-Sections] ]

Color and pressure requirements shall be in accordance with Table 5.1.11.

Table 5.1.11 Standard Designation Colors and Operating Pressures for Gas and Vacuum Systems

Gas ServiceAbbreviated

NameColors (Background/

Text)

Standard Gauge Pressure

kPa psi

Medical air Med air Yellow/black 345–380 50–55

Carbon dioxide CO2

Gray/black or

gray/white345–380 50–55

Helium He Brown/white 345–380 50–55

Nitrogen N2 Black/white 1100–1275 160–185

Nitrous oxide N2O Blue/white 345–380 50–55

Oxygen O2

Green/white or

white/green345–380 50–55

Oxygen/carbondioxide mixtures

O2/CO2n%

(n = % of CO2)Green/white 345–380 50–55

Medical–surgicalvacuum

Med vac White/black380 mm to 760 mm (15 in. to 30 in.)HgV

Waste anesthetic gasdisposal

WAGD Violet/white Varies with system type

Other mixturesGas A%/GasB%

Colors as above

Major gas forbackground/minor gas fortext

None

Nonmedical air

(Category 3

gas-powered device)

Yellow and white diagonalstripe/black

None

Nonmedical andCategory 3 vacuum

White and black diagonalstripe/black

boxed

None

Laboratory air Yellow and whitecheckerboard/black

None

Laboratory vacuum White and blackcheckerboard/black boxed

None

Instrument air

Medical Support Gas

Red/white

Red and Black/white1100–1275 160–185


Adding medical support gas to the table.


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Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement

Resolution: The proposed change to allow for systems to use a combination of nitrogen or instrument air in thesame pipeline could introduce issues with drug adulteration when using nitrogen NF. Additional issuesinclude the current lack of a gas-specific fittings for a combined support gas system.


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5.1.11.2.2

Where positive pressure gas piping systems operate at pressures other than the standard gauge pressureof 345 kPa to 380 kPa (50 psi to 55 psi) or a gauge pressure of 1100 kPa to 1275 kPa (160 psi to 185 psi)for nitrogen or instrument air medical support gas , the valve identification shall also include thenonstandard operating pressure.


Simplifying the sentence by including medical support gas which is by definition Nitrogen and or Instrument Air.







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5.1.11.3.1

Station outlets and inlets shall be identified as to the name or chemical symbol for the specific medical gasor vacuum provided.

(A) For medical support gas systems that use only Nitrogen, the outlet shall be idenified as the name orchemical symbol.

(B) For medical support gas systems that use only Instrument Air, the outlet shall be idenified as the nameor chemical symbol.

(C) For medical support gas systems that constitute both Nitrogen and Instrument Air, the facility may beable to use either the Nitrogen or Instrument Air outlets with the additon of a medical support gas label.

5.1.11.3.1.1

In sleep labs, where the outlet is downstream of a flow control device, the station outlet identification shallinclude a warning not to use the outlet for ventilating patients.


This will allow a facility to add a Nitrogen manifold as back up to an Instrument Air system or add an Instrument air compressor to a Nitrogen system and the outlet shall be labeled as such with an additional medical support gas label.







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5.1.11.3.2

Where medical gas systems operate at pressures other than the standard gauge pressure of 345 kPa to380 kPa (50 psi to 55 psi) or a gauge pressure of 1100 kPa to 1275 kPa (160 psi to 185 psi) fornitrogen medical support gas , the station outlet identification shall include the nonstandard operatingpressure in addition to the name of the medical support gas.


Facilities using a mixed gas system of nitrogen and instrument air to derive their medical support gas shall label the system as such.



Public Input No. 269-NFPA 99-2018 [Section No. 3.3.20] medical support gas




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5.1.12.2.1.2

The test gas shall be oil-free, dry nitrogen NF. inert purge gas as under 5.1.10.4.5.


See 5.1.10.4.5




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5.1.12.2.2 Initial Piping Blowdown.

Piping in medical gas and vacuum distribution systems shall be blown clear by means of oil-free, drynitrogen NF inert purge gas after installation of the distribution piping but before installation of stationoutlet/inlet rough-in assemblies and other system components (e.g., pressure/vacuum alarm devices,pressure/vacuum indicators, pressure relief valves, manifolds, source equipment).


See 5.1.10.4.5



Public Input No. 187-NFPA 99-2018 [Section No. 5.1.10.4.5] daughter




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5.1.12.2.4.3

The system under test shall be charged with oil-free, dry nitrogen NF inert purge gas to a gauge pressureof 345 kPa (50 psi).


See 5.1.10.4.5







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5.1.12.2.6.3

The piping systems shall be subjected to a 24-hour standing pressure test using oil-free, dry nitrogenNF. inert purge gas per 5.1.10.4.5


See 5.1.10.4.5







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5.1.12.2.6.5*

The leakage over the 24-hour test shall not exceed 0.5 percent 5 psi of the starting pressure [e.g., 2 kPa(0.3 psi) starting at 415 kPa (60 psig) , 0.3 mm (0.125 in.) for pressure piping and shall not exceed 2 inHgV starting at 635 mm (25 in.) HgV ] for vacuum and WAGD systems except that attributed to specificchanges in ambient temperature.


This leak rate is a more realistic value that can be performed using the gauges intended for this purpose. It is also coordinated with the manufacturers assemblies leak rate proposed in PI 325 covering paragraph 5.1.6.2. The amount of gas actually leaked at this 5 psi drop would be approx 502cc (roughly a softball size bubble) in 24 hours through a 1/2" copper pipeline 25' long connected to a 5/16" ID medical hose assembly 25' long.




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Resolution: The proposed changed introduces a significant increase in the allowed leakage rate without providingtrue justification for such a large change. Question on whether criteria for WAGD should be the sameas vacuum.


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5.1.12.3 System Inspection.


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5.1.12.3.1

General.

5.1.12.3.1.1

System inspections

Inspections shall be performed

prior to concealing piping distribution systems in walls, ceilings, chases, trenches, underground, orotherwise hidden from view.

and witnessed for all required tests in 5.1.12.2 Installer Performed Tests.

5.1.12.3.1.2

The test gas shall be dry nitrogen NF or the system gas where permitted .

5.1.12.3.1.3

Inspections shall be conducted by a third party technically competent and experienced in the field ofmedical gas and vacuum pipeline inspections and

testing and

meeting the requirements of ASSE 6020, Professional Qualifications Standard for Medical Gas SystemsInspectors ,

or ASSE 6030, Professional Qualifications Standard for Medical Gas Systems Verifiers

including Annex B .

5.1.12.3.1.4

Inspections shall be performed by a party other than the installing contractor. This individual shall beconsidered the AHJ or its Designee for the medical gas system.

5.1.12.3.1.5

Where systems have not been installed by in-house personnel, inspections shall be permitted by personnelof the organization who meet the requirements of

All test required under 5.1.12.2 shall be performed per section 5.1.12.2.1.3 through 5.1.12.2.7.7.

5.1.12.3.1.6 The test required by 5.1.12.2 shall be performed and documented by the installing contractorand witnessed by the Inspector, AHJ or its Designee prior to proceeding to the next test.

5.1.12.3.1.7 The test gas shall be dry Nitrogen NF regardless of the size of the system, which include thefollowing:

(1) Initial piping blow down (see 5.1.12. 2.2)

(2) Initial pressure test (see 5.1.12.2. 3 )

(3) Initial Cross-connection test (see 5 .1. 12.2.4)

(4) Initial Piping purge test (see 5.1.12.2.5)

(5) Standing Pressure test (see 5.1.12.2.6)

5.1.12. 3 . 1.8 Modified test against live systems shall be performed with a lower pressure than the livesystem, or use bottled gas of like system testing.

5.1.12.3.2

Inspections.Initial Piping Blow Down. Piping in medical gas and vacuum distribution systems being installed oraltered shall be blown clear as outlined in section 5.1.12.2.3. The Inspector, AHJ or its Designee shallwitness and document this test before proceeding on to the next test.

5.1.12.3.2.1

The initial pressure tests performed by the installing contractor shall be witnessed by an ASSE 6020inspector, an ASSE 6030 verifier, or the authority having jurisdiction or its designee. A form indicating that


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this test has been performed and witnessed shall be provided to the verifier at the start of the tests requiredin

This test shall also apply to the manufactured assemblies. The witnessed test documentation for themanufactured assembly shall be submitted and in hand prior to the next test or the next test shall notproceed.

5.1.12.3.3 Initial Pressure Test. Piping systems shall be subjected to a 1.5 times normal operatingpressure using the following procedure:

(1) After the system is filled with dry Nitrogen NF, the Nitrogen NF valve shall be closed.

(2) The piping system shall not decrease in pressure while each joint is leak tested per 5.1.12.2.3.5.

(3) Any leaks found shall be located, repaired, and retested, until no leaks are present.

5.1.12.3.4 Cross-Connection Test. It shall be determined that no cross-connections exist between thevarious medical gas and vacuum piping systems. Test shall be as described in section 5.1.12.2.4. TheAHJ or its Designee shall witness and document this test before proceeding on to the next test.

5.1.12.3.5 Initial Piping Purge Test. The outlet in each medical gas piping system shall be purged toremove any particulate matter from the distribution piping. Test shall be as described in section 5.1.12.2.5.The Inspector, AHJ or its Designee shall witness and document this test before proceeding on to the nexttest.

5.1.12.3.6. Standing Pressure Test for Positive Pressure Medical Gas Piping. After successfulcompletion of the required tests 5.1.12.

4.

2.2 through 5.1.12.2.5, medical gas distribution piping shall be subject to a standing pressure test per5.1.12.2.6. The Inspector, AHJ or its Designee shall witness and document this test before proceeding onto the next test.

5.1.12.3.

2.2

The presence and correctness of labeling and valve tagging required by this code for all concealedcomponents and piping distribution systems shall be inspected.

7 Standing Vacuum Test for Vacuum Piping. After successful completion of the required tests5.1.12.2.2 through 5.1.12.2.5, medical vacuum distribution piping shall be subject to a standing vacuumtest per 5.1.12.2.7. The Inspector, AHJ or its Designee shall witness and document this test beforeproceeding on to the next test.

5.1.12.3.7.1 The standing vacuum test shall use a medical grade portable vacuum pump and not thehouse system.

5.1.12.3.8 Documented Tests Reports. After successful completion of all contractor required tests,witnessed and recorded documents shall be submitted to the Verifier for their records.

5.1.12.3.8.1 Verifiers Documented Report. After completion of the verification process, the verifier’sreport shall be submitted to the Inspector, AHJ or its Designee for final review before medical gas systembeing turned over for patient use.



NFPA_99_MED_GAS_INSPECTION_PROPOSED_CODE_SECTION.docx


There is a need for Medical Gas Inspectors to have verbiage similar to the Verifiers verbiage. A verifier is not the only person who will inspect the medical gas systems. There are facilities, municipalities and organizations that will use a ASSE 6020 and or a ASSE 6030 to perform inspections. They need verbiage as to what they should be required to perform when a verifier is not being utilized for inspections. There are others around the US that would like to see some verbiage like what is being presented incorporated.


Submitter Full Name: John Gregory

Organization: HDR Architecture Inc.


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Committee Statement

Resolution: Requiring the inspector to be on site to witness up to 5 of the installer-performed test does notnecessarily add value to the process. Systems can be tested over many phases and the burden oninspector, installer, and facility to accommodate schedules could add significant time to projects.


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NFPA99

MedicalGasSystemsEnforcement

5.1.12.3 Systems Installation Inspections.

5.1.12.3.1 General.

5.1.12.3.1.1 Inspections shall be performed and witnessed for all required tests in 5.1.12.2 Installer Performed Tests. (Supportive ASSE 6010 verbiage, refer to ANNEX A section A.1.1, b) Inspectors certified to ASSE Standard 6020 shall be notified when each test is being performed so the test can be witnessed and the results can be recorded.)

5.1.12.34.1.2 The test gas shall be dry nitrogen NF or the system gas where permitted.

5.1.12.3.1.3 Inspections shall be conducted by a third party technically competent and experienced in

the field of medical gas and vacuum pipeline inspections and meeting the requirements of ASSE 6020,

Professional Qualifications Standard for Medical Gas Systems Inspectors, including Annex B.

5.1.12.3.1.4 Inspections shall be performed by a party other than the owner, installing contractor or the

system verifier. This individual shall be considered the AHJ or its Designee for the medical gas system.

5.1.12.3.1.5 All test required under 5.1.12.2 shall be performed per section 5.1.12.2.1.3 through

5.1.12.2.7.7.

5.1.12.3.1.6 The test required by 5.1.12.2 shall be performed and documented by the installing

contractor and witnessed by the AHJ or its Designee prior to proceeding to the next test.

5.1.12.3.1.7 The test gas shall be dry Nitrogen NF regardless of the size of the system, which include the

following:

(1) Initial piping blow down (see 5.1.12.2.2)

(2) Initial pressure test (see 5.1.12.2.3)

(3) Initial Cross‐connection test (see 5.1.12.2.4)

(4) Initial Piping purge test (see 5.1.12.2.5)

(5) Standing Pressure test (see 5.1.12.2.6)

5.1.12.3.1.8 Modified test against live systems shall be performed with a lower pressure than the live

system, or use bottled gas of like system testing.

5.1.12.3.2 Initial Piping Blow Down. Piping in medical gas and vacuum distribution systems being

installed or altered shall be blown clear as outlined in section 5.1.12.2.3. The AHJ or its Designee shall

witness and document this test before proceeding on to the next test.

5.1.12.3.2.1 This test shall also apply to the manufactured assemblies. The witnessed test

documentation for the manufactured assembly shall be submitted and in hand prior to the next test or

the next test shall not proceed.

5.1.12.3.3 Initial Pressure Test. Piping systems shall be subjected to a 1.5 times normal operating

pressure using the following procedure:

(1) After the system is filled with dry Nitrogen NF, the Nitrogen NF valve shall be closed.

(2) The piping system shall not decrease in pressure while each joint is leak tested per 5.1.12.2.3.5.

(3) Any leaks found shall be located, repaired, and retested, until no leaks are present.

5.1.12.3.4 Cross‐Connection Test. It shall be determined that no cross‐connections exist between the

various medical gas and vacuum piping systems. Test shall be as described in section 5.1.12.2.4. The AHJ

or its Designee shall witness and document this test before proceeding on to the next test.

5.1.12.3.5 Initial Piping Purge Test. The outlet in each medical gas piping system shall be purged to

remove any particulate matter from the distribution piping. Test shall be as described in section

5.1.12.2.5. The AHJ or its Designee shall witness and document this test before proceeding on to the

next test.

5.1.12.3.6. Standing Pressure Test for Positive Pressure Medical Gas Piping. After successful

completion of the required tests 5.1.12.2.2 through 5.1.12.2.5, medical gas distribution piping shall be

subject to a standing pressure test per 5.1.12.2.6. The AHJ or its Designee shall witness and document

this test before proceeding on to the next test.

5.1.12.3.7 Standing Vacuum Test for Vacuum Piping. After successful completion of the required tests

5.1.12.2.2 through 5.1.12.2.5, medical vacuum distribution piping shall be subject to a standing vacuum

test per 5.1.12.2.7. The AHJ or its Designee shall witness and document this test before proceeding on to

the next test.

5.1.12.3.7.1 The standing vacuum test shall use a medical grade portable vacuum pump and not the

house system.

5.1.12.3.8 Documented Tests Reports. After successful completion of all contractor required tests,

witnessed and recorded documents shall be submitted to the Verifier for their records.

5.1.12.3.8.1 Verifiers Documented Report. After completion of the verification process, the verifier’s

report shall be submitted to the AHJ or its Designee for final review before medical gas system being

turned over for patient use.


5.1.12.4.1.2

The test gas shall be oil-free, dry nitrogen NF inert purge gas per 5.1.10.4.5 or the system gas wherepermitted.


See 5.1.10.4.5







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5.1.12.4.2* Standing Pressure Test.

Piping systems shall be subjected to a 10-minute standing pressure test at operating line pressure usingthe following procedure:

(1) After the system is filled with nitrogen inert purge gas per 5.1.10.4.5 or source gas, the source valveand all zone valves shall be closed.

(2) The piping system shall show no decrease in pressure after 10 minutes.

(3) Any leaks found shall be located, repaired, and retested per 5.1.12.2.6.


See 5.1.10.4.5







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5.1.12.4.2* Standing Pressure Test.

Piping systems shall be subjected to a 10-minute standing pressure test at operating line pressure usingthe following procedure:

(1) After the system is filled with nitrogen or source gas, the source valve and all zone valves shall beclosed.

(2) The piping system shall show no decrease in pressure after 10 minutes.

(3) Any leaks found shall be located, repaired, and retested per 5.1.12.2.6.

(4) This test shall be performed using the zone valve box gauge as provided with the zone valve box.


This change will establish a consistency which currently does not exist. Some Verifiers use equipment other than the standard zone valve box gauge which are much more sensitive and may exceed the manufacturered assembly leakage rate. The hope here is to establish a consistency in the industry.




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Resolution: Section 5.1.12.1.13 requires gauges with 1% accuracy. Typical zone valve gauges are + or - 5% anddo not provide the accuracy which should be afforded to this testing.


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(B)

The test gas pressure in all medical gas piping systems shall be increased to the values indicated in Table5.1.12.4.3.2(B), simultaneously maintaining these nominal pressures throughout the test.

Table 5.1.12.4.3.2(B) Alternate Test Pressures

Medical Gas Pressure (Gauge)

Gas mixtures 140 kPa (20 psi)

Nitrogen/instrument air Medical SupportGas

210 kPa (30 psi)

Nitrous oxide 275 kPa (40 psi)

Oxygen 345 kPa (50 psi)

Medical air 415 kPa (60 psi)

Systems at nonstandard pressures70 kPa (10 psi) greater or less than any othersystem

HgVvacuum

Vacuum 510 mm (20 in.) HgV

WAGD 380 mm (15 in.) HgV (if so designed)


To be consistent, medical support gas is Nitrogen and or Instrument Air.







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Public Input No. 195-NFPA 99-2018 [ Section No. 5.1.12.4.5.1(F) ]

(F)

Test gases for the initial tests shall be oil-free, dry nitrogen NF, inert purge gas per 5.1.10.4.5, the gas ofsystem designation, or operating vacuum.


See 5.1.10.4.5







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5.1.12.4.7.5

The test shall be performed with the use of oil-free, dry nitrogen NF. inert purge gas per 5.1.10.4.5.


See 5.1.10.4.5







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5.1.12.4.8.1

These tests shall be performed with oil-free, dry nitrogen NF inert purge gas per 5.1.10.4.5 or the systemgas.


See 5.1.10.4.5







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5.1.13.1.1

Medical Support gases Gases are any gases that are used primarily for powering equipment used inpatient care procedures (typical medical support gases are can be nitrogen and , instrument air orcombination of the two ). Support gas applications require delivery at pressures, cleanliness, or puritiesspecific to their intended function(s) (e.g., to operate medical–surgical tools). Medical Support gasesGases shall be permitted to be piped into areas intended for any medical support purpose and, ifappropriate to the procedures, to be piped into laboratories.


Further defining medical support gas.







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(A)

Instrument air sources shall include the following alarms:

(1) Local alarm that activates indicates when or just before the backup compressor (if provided)activates, indicating that the lag compressor is in operation and must be manually reset the capacity ofthe Instrument air central supply system not in use is less than the equivalent capacity of onecompressor. This signal shall require manual reset

(2) Local alarm and alarms at all master alarm panels that activate when the dew point at system pressureexceeds −30°C (−22°F), indicating a high dew point


This brings the requirement and language in line with other similar requirements (e.g. 5.1.3.6.3.12 (F))




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Statement: This brings the requirement and language in line with other similar requirements (e.g. 5.1.3.6.3.12(F))


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5.1.13.4 Valves.

Requirements for support gas valves shall be in accordance with 5.1.4.1.1 through 5.1.4.8 . 8 except w here

the support gas piping system is used only for indirect support of medical procedures (e.g. is not used to drive surgical

tools but is used only for brake operation, is used in labs, central sterile supply, or other similar non-patient

applications) it shall be permitted to locate the zone valve "in line", compliant with 5.1.4.1.2 instead of 5.1.4.6.1.


This is a frequent problem where support gases are used in areas and applications which have no direct relationship to any patient care procedures. The most common is a system provided to operate pneumatic brakes on a pendant, or dewatering catheters in central sterile supply. Because they are installed as support gases, zone valves and alarms are insisted upon although they have no clear benefit. This change would allow simplification for these simple and non-critical systems.




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Committee Statement

Resolution: Allowing for all uses to not have to go through a zone valve could lead to services that are critical topatient care to not be accessible at zone valve. The code allows for potential alternative valving.


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5.1.13.9.1

General requirements for support gas warning systems shall be in accordance with 5.1.9.1 except wherethe support gas system is used only for indirect support of medical procedures (e . g. is not used forsurgical tools but used only for boom brakes, in labs, central sterile supply, or other similar applications). Insuch cases the facility may alarm the support gases as will best facilitate their plan for loss of thesesupplies.


This is a frequent problem where support gases are used in areas and applications which have no direct relationship to any patient care procedures. The most common is a system provided to operate pneumatic brakes on a pendant, or dewatering catheters in central sterile supply. Because they are installed as support gases, zone valves and alarms are insisted upon although they have no clear benefit. This change would allow simplification for these simple and non-critical systems.




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Committee Statement

Resolution: This was in conjunction with PI 162 which was resolved as follows: "Allowing for all uses to not haveto go through a zone valve could lead to services that are critical to patient care to not be accessibleat zone valve. The code allows for potential alternative valving. " Examples belong in the annex.


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(B)

Appropriate qualification shall be demonstrated by any of the following:

(1) A documented training program acceptable to the health care facility by which such persons areemployed or contracted to work with specific equipment as installed in that facility

(2) Credentialing to the requirements of ASSE 6040, Professional Qualification Standard for Medical GasMaintenance Personnel, and technically competent on the specific equipment as installed in thatfacility.

(3) Credentialing to the requirements of ASSE 6030, Professional Qualification Standard for Medical GasSystems Verifiers, and technically competent on the specific equipment as installed in that facility.

(4) Credentialing to the requirements of ASSE 6010, Professional Qualification Standard for Medical GasSystems Installers , and technically competent on the specific equipment as installed in that facility.

(5) Credentialing to the requirements of ASSE 6020, Professional Qualification Standard for Medical GasSystems Inspectors, and technically competent on the specific equipment as installed in that facility.


There is no reason to exclude the ASSE 6010 and 6020 certifications from performing maintenance. 6010, 6020, 6030, and 6040 all require passing a training course to learn NFPA 99 code. I feel that installers are being discriminated due to the training of the NFPA 99 code is identical. The ASSE 6010 has to perform a brazing test in addition to the NFPA 99 code test, and therefore posses a mechanical knowledge.




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Committee Statement

Resolution: The criteria for certification and training of ASSE 6040 personnel includes specific maintenanceknowledge and training on equipment maintenance that the 6010 or 6020 training does not include.


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5.1.14.5.2

The supplier of the bulk cryogenic liquid the cryogenic fluid central supply system shall, upon request,provide documentation of vaporizer(s) sizing criteria to the facility.







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5.1.14.5.3

An annual review of bulk of cryogenic fluid central supply system capacity shall be conducted to ensurethe source system has sufficient capacity.







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5.2.1.1

These requirements shall apply to health care facilities that qualify for Category 2 systems as referenced inChapter 4.

Note: For Category 2 dental gas and vacuum systems, see section 15.4 and for Category 2 hyperbariccare, see section 14.1.3.2 .


No clear direction is provided for the user to direct them to the Dental and Hyperbaric care sections of the standard. This was discussed by the Technical committee during the Pre-First draft meeting and I volunteered to submit the PI to include this direction within the standard.










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5.2.1.2

Category 2 piped gas or piped vacuum system requirements shall be permitted when all of the followingcriteria are met:

(1) Only moderate sedation; minimal sedation, as defined in 3.3.65.3 and 3.3.65.4 ; or no sedation isperformed. Deep sedation and general anesthesia shall not be permitted.

(2) The loss of the piped gas or piped vacuum systems is likely to cause minor injury to patients, staff, orvisitors.

(3) The facility piped gas or piped vacuum systems are intended for Category 2 patient care space per3.3.135.2 .





Public Input No. 153-NFPA 99-2018 [Section No. 5.1.1.2] Same issue, different Category




Affiliation: None

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5.2.1.4 Medical gas outlet and inlets in Category 2 spaces (see 3.3.135.1) shall be supplied only from sources and

through piping networks compliant with Category 1 or 2


Changes in the way the standard is treating "spaces" and the real possibility of Category 1, 2 and 3 spaces being supplied from the same sources suggests this provision needs to be clarified.








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Statement: Changes in the way the standard is treating "spaces" and the real possibility of Category 1, 2 and 3spaces being supplied from the same sources suggests this provision needs to be clarified.


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5.2.3.2

Central Supply

OperationsSystem Location and Ventilation .

(1) Category 2

systems

system operations shall comply with 5.1.3.

2.

3


The title of this clause can be made more specific to reflect the section (s) referenced.




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Resolution: The current language aligns with Category 1 and references the correct section.


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Category 25.2.3.5

Medical Air Supply Systems

.

Category 2 systems shall comply

Medical air outlets in Category 2 spaces may be supplied by any of the following:

(A) A medical air central supply system compliant with 5.1.3.6

, except as follows: Medical air compressors, dryers, aftercoolers, filters, and regulators

(B) A medical air central supply system compliant with 5.1.3.6 with the following exceptions to 5.1.3.6.3.9(e):

(1) 5.1.3.6.9 (B) One compressor shall be permitted

(2) 5.1.3.6.9 (E) Dryers, filters and pressure controls shall be permitted to be simplex.

The facility staff shall develop their emergency plan to deal with the loss of medical air.

(C) A medical air compressor system compliant with 5.2.3.5 (B) with a cylinder manifold (5.1.3.5.12) orcylinder header reserve compliant with 5.1.3.5.10.

(D). A cylinder manifold compliant with 5.1.3.5.12


Changes in the way the standard is treating "spaces" requires that these sections be changed in turn. It is not a new allowance for a Category 1 source to supply a Category 2 space, but this proposed wording is intended to make that relationship more clear and explicit. This is seen in the usage "outlets in Category 2 spaces shall be permitted to be supplied"The new language explicitly speaks to the use of a manifold as source for Category 2. Notionally, these have always been permitted, the new language makes this specific.There is also a new allowance (C) for a system composed of a compressor and cylinder header.




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Resolution: The issue with spaces has been addressed at the start of 5.2. The committee would welcomesuggested annex language at the public comment stage to add clarifying language as to what thesubmitter is intending.


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5.2.3.7

Category 2 Medical–Surgical Vacuum.


Medical Vacuum Supply Systems

Medical vacuum inlets in Category 2 spaces may be supplied by any of the following:

(A) A medical vacuum central supply system compliant with 5.1.3.7

, except as follows:

(1) Medical–surgical vacuum systems shall be permitted to be simplex.

(2) The facility staff shall develop their emergency plan to deal with the loss of medical–surgical vacuum.

(B) A medical vacuum central supply system compliant with 5.1.3.7 with the exception that a single pumpshall be permitted


Changes in the way the standard is treating "spaces" requires that these sections be changed in turn. It is not a new allowance for a Category 1 source to supply a Category 2 space, but this proposed wording is intended to make that relationship more clear and explicit. This is seen in the usage "inlets in Category 2 spaces shall be permitted to be supplied"




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5.2.3.8

Category 2 WAGD.


WAGD Supply Systems

WAGD inlets in Category 2 spaces may be supplied from any of the following:

(A) Any WAGD supply method compliant with 5.1.3.8

, except as follows: Medical WAGD pumps

.

(B) Any WAGD supply method compliant with 5.1.3.8 with the exception that producers compliant with5.1.3.8.1.6 shall be permitted to

be simplex. The facility staff shall develop their emergency plan to deal with the loss of WAGD.

have a single producer (see 5.1.3.8.1.6 (1))


Changes in the way the Code is treating "spaces" requires that these sections be changed in turn. It is not a new allowance for a Category 1 source to supply a Category 2 space, but this proposed wording is intended to make that relationship more clear and explicit.

The wording is also more comprehensive, extending to allow for any of the allowed WAGD implementations from Category 1 to be applied.




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5.2.3.9 Instrument Air Supply Systems .

Category 2 systems shall complyInstrument air outlets in Category 2 spaces may be supplied by any of the following:

1. An instrument air central supply system compliant with 5.1.13.3.4 except 5 . 1.13.4.4. Category 2systems shall be permitted to consist of a single compressor.

2. A cylinder manifold compliant with 5.1.3.5.12

3. A cylinder header compliant with 5.1.3.5.10 provided with a means for pressure control compliant with5.1.3.5.5.1 except that these means shall be permitted to not be redundant.


Changes in the way the standard is treating "spaces" requires that these sections be changed in turn. It is not a new allowance for a Category 1 source to supply a Category 2 space, but this proposed wording is intended to make that relationship more clear and explicit. This is seen in the usage "outlets in Category 2 spaces shall be permitted to be supplied"An additional allowance for Category 2 would be use of a basic cylinder header with the additional pressure control equipment needed to implement this.




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5.2.14* Category 2 Operation and Management.

(1) Facilities operating Category 2

systemsmedical gas, vacuum and supports gases shall comply with 5.1.14

(2) Facilities using Category 2 Medical Air, Vacuum, WAGD or Support gas systems with simplex sourcesof supply shall develop their emergency plan to deal with the loss of medical gas .


This provision is moved from the sections on equipment to the "Operations" section.




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Public Input No. 91-NFPA 99-2018 [ Section No. 5.3 ]


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YELLOW = Highlighted area are the differences from Cat 2 to Cat 3

Underlined information = New information added

Crossed Out information = deleted text from 2018 edition

5.3

* Category 3 Piped Gas and Vacuum Systems.

5.3.1

Applicability.

5.3.1.1

These requirements shall apply to health care facili es that require Category 3 systems as referenced in

Chapter

Chapter 4 .

5.3.1.2

Category 3 piped gas and vacuum systems shall be permi ed when all of the following criteria are met:

(1) Only moderate seda on; minimal seda on, as defined in 3.3.65.3 and 3.3.65.4 ; or no seda on is

performed. Deep seda on and general anesthesia are not performed.

(2) The loss of the piped gas and vacuum systems is not likely to cause injury to pa ents, staff, or visitors but

can cause discomfort.

(3) The facility piped gas and vacuum systems are intended for Category 3 or Category 4 pa ent care rooms per

3.3.135.3 and 3.3.135.4 .

5.3.1.3

The following sec ons of this chapter shall apply to the opera on, management, and maintenance of the medical

gas and vacuum systems in both new and exis ng health care facili es:

(1) 5.1.3.6.2

(2) 5.1.3.8.4.2

(3) 5.1.10.11.7.1

(4) 5.3.3.1

( 5 ) 5 .3.3.2

(6) 5.3.3.3

(7) 5.3.3.5(2)

(8) 5.3.3.7(2)

(9) 5.3.3.8(2)

(10) 5.3.14


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5.3.2

Nature of Hazards of Gas and Vacuum Systems.

The requirement of 5.1.2 shall apply to the nature of hazards of gas and vacuum systems.

5.3.3

Category 3 Sources.

5.3.3.1

Central Supply System Iden fica on and Labeling.

Category 3 systems shall comply with 5.1.3.1 .

5.3.3.2

Central Supply Opera ons.


5.3.3.3

Central Supply System Loca ons.


5.3.3.4

Control Equipment. Category 3 systems shall comply with 5.1.3.4.

5.3.3. 4 5 Central Supply Systems.

Category 3 Central Supply Systems shall be permi ed to consist of the following: systems shall comply with

5.1.3.5 ,

(1) Gas Cylinder Or Cyrogenic Liquid Containers Header per 5 . 3.3.5.10

(2) Oxygen Concentrator Supply Units per 5.3.3.5

Medical Air Supply Systems.

.11

(3) Cylinder Manifolds for gas cylinders per 5.3.3.5.12,

(4) Manifolds for cryogenic liquid containers per 5.3.3.5.13,

(5) Cryogenic Fluid Central Supply Systems per 5.3.3.5.14,

(6) Medical Air Compressor Systems per 5.3.3.6,

( 7) Propor oning Air Systems per 5.3.3.6.3.14

(8) Medical‐Surgical Vacuum Systems per 5.3.3.7,

(9) Waste Anesthe c Gas Disposal Systems per 5.3.3.8

(10) Instrument air Compressor Systems per 5.3.13.3.4

5.3.3.5.1 General. Category 3 systems shall comply with 5.1.3. 5.1

5.3.3.5.2 Permi ed Loca ons for Medical Gases. Category 3 systems shall comply with 5.1.3.5.2

5.3.3.5.3 Support Gases. Category 3 systems shall comply with 5.1.3.5.3

5.3.3.5.4 Materials. Category 3 systems shall comply with 5.1.3.5.4

5.3.3.5.5 Controls for Line Pressure. Category 3 systems shall comply with 5.1.3.5, except final line controls

shall be permi ed to be simplexed.


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5.3.3.5. 6 Relief Valves. Category 3 systems shall comply with 5.1.3.5.6

5.3.3.5.7 Auxiliary Source Connec on. Category 3 systems shall comply with 5.1.3.5.7

5.3.3.5.8 Mul ple Pressures. Category 3 systems shall comply with 5.1.3.5.8 , except

as follows:

Medical air compressors, dryers, aftercoolers, filters, and regulators shall be permitted to besimplex.

each piped distribu on network from the single central supply system shall be permi ed to have each

component of the control mechanism simplexed.

5.3.3.5.9 Local Signals. Category 3 systems shall comply with 5.1.3.5.9

5.3.3.5.10 Gas Cylinder or Cryogenic Liquid Container Header. Category 3 systems shall comply with 5.1.3.5

and 5.1.3.5.10, expect as follows:

(1) Gas cylinder orCryogenic Liquid Container header per 5.1.3.5.10 with sufficient cylinder connec ons to

provide for at least one average day’s supply with the appropriate number of connec ons being determined

a er considera on of the delivery schedule, the proximity of the facility to alternate supplies, and the

facility’s emergency plan

(2) The Header shall have a local signal that visibly indicates the opera ng status of the equipment and

comply with 5.1.3.5.9.2.

(3) The facility staff shall develop their emergency plan to deal with the loss of

medical air

the headers medical gas (Oxygen, Nitrous Oxide, Nitrogen, Medical Air, Carbon Dioxide, Helium, etc) .

5.3.3.

6

5.11 Oxygen Central Supply Systems Using Concentrators.

Category 3 oxygen

Category 3 system shall comply with 5.1.3.5, 5.1.3.5.11 and 5.1.3.9, except as follows:

(1) O o xygen supply systems using concentrators shall be permi ed to consist of two

sources

one source s , one of which shall be a cylinder header with sufficient cylinder connec ons for one average

day’s supply.

(2) The facility staff shall develop their emergency plan to deal with the loss of oxygen.

5.3.3.

7 Medical–Surgical Vacuum.

Category 3 systems

5.12 Manifolds for Gas Cylinders. Category 3 system shall comply with 5.1.3.5 and 5.1.3.5.12

5.3.3.5.13 Manifolds for Cryogenic Liquid Containers. Category 3 system shall comply with 5.1.3.5 and

5.1.3.5.13

5.3.3.5.14 Cryogenic Fluid Central Supply Systems. Category 3 system shall comply with 5.1.3.5 and

5.1.3.5.14

5.3.3.6 Medical Air Compressor Systems. Category 3 system shall comply with 5.1.3.5 and 5.1.3.6, except as

follows:


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(1) Medical air compressors, dryers, a ercoolers, filters, and regulators shall be permi ed to be simplex. (2)


5.3.3.6.3.14 Propor oning Air Systems. Category 3 system shall comply with 5.1.3.5, 5.1.3.6 and

5.1.3.6.3.14 (Not sure about numbering sequence)

5.3.3.7 Medical‐Surgical Vacuum Systems. Category 3 system shall comply with 5.1.3.

7,

5 and 5.3.3.7 except as follows:

(1) Medical–surgical vacuum systems shall be permi ed to be simplex.

(2) The facility staff shall develop their emergency plan to deal with the loss of medical–surgical vacuum.

5.3.3.8

WAGD.

Waste Anesthe c Gas Disposal Systems. Category 3

systems

system shall comply with 5.1.3.

8,

5 and 5.1.3.8 except as follows:

(1) Medical WAGD pumps shall be permi ed to be simplex.

(2) The facility staff shall develop their emergency plan to deal with the loss of WAGD.

5.3. 13. 3.

9

4 Instrument Air

Supply

Compressor Systems

.

Category 3

systems

system shall comply with 5.1. 3.5 and 5.1. 13.3.4 except as follows: (Not sure about numbering

sequence)

(1) Instrument Air Compressor Systems shall be permi ed to be simplex with no standby header .

(2) The facility staff shall develop their emergency plan to deal with the loss of Instrument Air.

5.3.

4 Valves.

3.6 Oxygen Central Supply Systems Using Concentrators. Category 3 oxygen supply systems using

concentrators shall be permi ed to consist of two sources, one of which shall be a cylinder header with

sufficient cylinder connec ons for one average day’s supply.

5.3.4 Valves. Category 3 systems shall comply with 5.1.4 .

5.3.5

Sta on Outlets and Inlets.

Category 3 systems shall comply with 5.1.5 .

5.3.6


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Manufactured Assemblies.


5.3.7

Surface‐Mounted Medical Gas Rails.


5.3.8

Pressure and Vacuum Indicators.


5.3.9

Warning Systems.

Warning systems associated with Category 3 systems shall provide the master, area, and local alarm func ons

of a Category 1 system as required in 5.1.9 , except as follows:

(1) Warning systems shall be permi ed to be a single alarm panel (ie . Combo master/area alarm panel).

(2) The alarm panel shall be located in an area of con nuous surveillance while the facility is in opera on.

(3) Pressure and vacuum switches/sensors shall be mounted at the source equipment with a pressure

indicator at the master alarm panel.

(4) Electrical Power for the warning systems shall be in accordance with NFPA 70 and NFPA 99 chapter 6

Electrical Systems sec ons 6.6 for Category 3 and 4 Spaces

5.3.10

Distribu on.


5.3.11

Labeling and Iden fica on.


5.3.12

Performance Criteria and Tes ng — Gas,

Medical–Surgical

Medical– Surgical Vacuum, and WAGD.


5.3.13

Support Gases.

Category 3 systems shall comply with 5.1.13 , except as noted in 5 . 3.13.3.4.

5.3.14

Opera on and Management.



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5.3.3.4 Control Equipment. Category 3 systems shall comply with 5.1.3.4. This section was not referenced in 2018 edition when Cat 1 added this new section in 2015 edition (Editorial and critical reference needed that applies to a remote location for control equipment.)5.3.3.5 Central Supply Systems. Category 3 Central Supply Systems shall be permitted to consist of the following:(This addition allows the reader a clear understanding of acceptable central supply systems). (1) Gas Cylinder Or Cyrogenic Liquid Containers Header per 5.3.3.5.10 (As a Cat 3 medical gas systems, unlike Cat 2 that is defined as a loss of gas could cause minor injury to patients, describes a lose of medical gas should only cause, at worse, discomfort to the patient. Cat 3 Med Air and Vacuum systems already allow for simplexing) (2) Oxygen Concentrator Supply Units per 5.3.3.5.11(3) Cylinder Manifolds for gas cylinders per 5.3.3.5.12, (4) Manifolds for cryogenic liquid containers per 5.3.3.5.13, (5) Cryogenic Fluid Central Supply Systems per 5.3.3.5.14, (6) Medical Air Compressor Systems per 5.3.3.6, (7) Proportioning Air Systems per 5.3.3.6.3.14(8) Medical-Surgical Vacuum Systems per 5.3.3.7, (9) Waste Anesthetic Gas Disposal Systems per 5.3.3.8(10) Instrument air Compressor Systems per 5.3.13.3.4(For the reader, each section of 5.3.3.5.1 - 5.3.3.5.14 and 5.3.3.6 sections are spelled out for code acceptance clarity) 5.3.3.5.1 General. Category 3 systems shall comply with 5.1.3.5.15.3.3.5.2 Permitted Locations for Medical Gases. Category 3 systems shall comply with 5.1.3.5.25.3.3.5.3 Support Gases. Category 3 systems shall comply with 5.1.3.5.35.3.3.5.4 Materials. Category 3 systems shall comply with 5.1.3.5.45.3.3.5.5 Controls for Line Pressure. Category 3 systems shall comply with 5.1.3.5, except final line controls shall be permitted to be simplexed. 5.3.3.5.6 Relief Valves. Category 3 systems shall comply with 5.1.3.5.65.3.3.5.7 Auxiliary Source Connection. Category 3 systems shall comply with 5.1.3.5.75.3.3.5.8 Multiple Pressures. Category 3 systems shall comply with 5.1.3.5.8, except each piped distribution network from the single central supply system shall be permitted to have each component of the control mechanism simplexed. 5.3.3.5.9 Local Signals. Category 3 systems shall comply with 5.1.3.5.95.3.3.5.10 Gas Cylinder Or Cryogenic Liquid Containers Header . Category 3 systems shall comply with 5.1.3.5 and 5.1.3.5.10, expect as follows: (As a Cat 3 medical gas systems, unlike Cat 2 that is defined as a loss of gas could cause minor injury to patients, describes a lose of medical gas should only cause, at worse, discomfort to the patient. Cat 3 Med Air and Vacuum systems already allow for simplexing) (1) Gas cylinder header per 5.1.3.5.10 with sufficient cylinder connections to provide for at least one average day’s supply with the appropriate number of connections being determined after consideration of the delivery schedule, the proximity of the facility to alternate supplies, and the facility’s emergency plan(2) The Gas Cylinder Header shall have a local signal that visibly indicates the operating status of the equipment and comply with 5.1.3.5.9.2. (3) The facility staff shall develop their emergency plan to deal with the loss of the header medical gas (Oxygen, Nitrous Oxide, Nitrogen, Medical Air, Carbon Dioxide, Helium, etc).5.3.3.5.11 Oxygen Central Supply Systems Using Concentrators. Category 3 system shall comply with 5.1.3.5, 5.1.3.5.11 and 5.1.3.9, except as follows: (As a Cat 3 medical gas systems, unlike Cat 2 that is defined as a loss of gas could cause minor injury to patients, describes a lose of medical gas should only cause, at worse, discomfort to the patient. Cat 3 Med Air and Vacuum systems already allow for simplexing) (1) Oxygen supply systems using concentrators shall be permitted to consist of two one source s. (2) The facility staff shall develop their emergency plan to deal with the loss of oxygen.5.3.3.5.12 Manifolds for Gas Cylinders. Category 3 system shall comply with 5.1.3.5 and 5.1.3.5.125.3.3.5.13 Manifolds for Cryogenic Liquid Containers. Category 3 system shall comply with 5.1.3.5 and 5.1.3.5.135.3.3.5.14 Cryogenic Fluid Central Supply Systems. Category 3 system shall comply with 5.1.3.5 and 5.1.3.5.145.3.3.6 Medical Air Compressor Systems. Category 3 system shall comply with 5.1.3.5 and 5.1.3.6, except as follows: (Included section 5.1.3.5 that has the code requirements for all central supply systems, in addition to individual sections as 5.1.3.6 has for Medical Air Compressors) (1) Medical air compressors, dryers, aftercoolers, filters, and regulators shall be permitted to be simplex. (2) The facility staff shall develop their emergency plan to deal with the loss of medical air. 5.3.3.6.3.14 Proportioning Air Systems. Category 3 system shall comply with 5.1.3.5, 5.1.3.6 and 5.1.3.6.3.14 (Not sure about numbering sequence) (Added Proportioning Air Systems that was not included in the 2018 edition, but was approved in 2012 edition of NFPA 99)5.3.3.7 Medical-Surgical Vacuum Systems. Category 3 system shall comply with 5.1.3.5 and 5.3.3.7 except as follows: (Included section 5.1.3.5 that has the code requirements for all central supply systems, in addition to individual sections as 5.1.3.7 has for Medical - Surgical Vacuum Systems) (1) Medical–surgical vacuum systems shall be permitted to be simplex. (2) The facility staff shall develop their emergency plan to deal with the loss of medical–surgical vacuum. 5.3.3.8 Waste Anesthetic Gas Disposal Systems. Category 3 system shall comply with 5.1.3.5 and 5.1.3.8 except


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as follows: (Included section 5.1.3.5 that has the code requirements for all central supply systems, in addition to individual sections as 5.1.3.8 has for WAGD)(1) Medical WAGD pumps shall be permitted to be simplex. (2) The facility staff shall develop their emergency plan to deal with the loss of WAGD. 5.3.13.3.4 Instrument Air Compressor Systems Category 3 system shall comply with 5.1.3.5 and 5.1.13.3.4 except as follows: (Not sure about numbering sequence) (As a Cat 3 medical gas systems, unlike Cat 2 that is defined as a loss of gas could cause minor injury to patients, describes a lose of medical gas should only cause, at worse, discomfort to the patient. Cat 3 Med Air and Vacuum systems already allow for simplexing) (1) Instrument Air Compressor Systems shall be permitted to be simplex with no standby header. (2) The facility staff shall develop their emergency plan to deal with the loss of Instrument Air. 5.3.9 Warning Systems. Warning systems associated with Category 3 systems shall provide the master, area, and local alarm functions of a Category 1 system as required in 5.1.9, except as follows: (4) Electrical Power for the warning systems shall be in accordance with NFPA 70 and NFPA 99 chapter 6 Electrical Systems sections 6.6 for Category 3 and 4 Spaces (Cat 3 spaces are not required to have EES. This changes harmonizes Chapter 6 and Chapter 5 as it relates to Electrical Power requirements for a Cat 3 space.)5.3.13 Support Gases. Category 3 systems shall comply with 5.1.13, except as noted in 5.3.13.3.4. (Editorial)





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Committee Statement


Statement: This revision is a first step to differentiate between Category 2 and Category 3 Medical Gas systemswhich were treated exactly the same for the 2018 edition after all of the previous Category 3 materialwas moved to Chapter 15. Based on risk categories, there is less risk where Category 3 systems areused and therefore the systems do not need to be as complex as those for greater risk.


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5.3.1.1

These requirements shall apply to health care facilities that require Category 3 systems as referenced inChapter 4.

Note: For Category 3 dental gas and vacuum systems, see section 15.5 and for Category 3 hyperbariccare, see section 14.1.3.3.


Currently no clear direction is provided to send users to Chapter 15 of this code for Dental applications or Hyperbaric applications. This revision helps to direct the user to the correct section of the code for the applications identified. This was discussed by the Technical committee during the Pre-First Draft meeting and I volunteered to submit the public input to provide this direction.










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5 . 3.1.2

Category 3 piped gas and vacuum systems shall be permitted when all of the following criteria are met:

(1) Only moderate sedation; minimal sedation, as defined in 3.3.65.3 and 3.3.65.4 ; or no sedation isperformed. Deep sedation and general anesthesia are not performed.

(2) The loss of the piped gas and vacuum systems is not likely to cause injury to patients, staff, or visitorsbut can cause discomfort.

(3) The facility piped gas and vacuum systems are intended for Category 3 or Category 4 patient carerooms per 3.3.135.3 and 3.3.135.4 .





Public Input No. 153-NFPA 99-2018 [Section No. 5.1.1.2] Same issue, different Category




Affiliation: None

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5.3.1.2

Category 3 piped gas and vacuum systems shall be permitted when all of the following criteria are met:

(1) Only moderate sedation; Only minimal sedation, as defined in 3.3.65.3 and 3.3.65.4; or no sedation isperformed. Deep sedation and general anesthesia are not performed.

(2) The loss of the piped gas and vacuum systems is not likely to cause injury to patients, staff, or visitorsbut can cause discomfort.

(3) The facility piped gas and vacuum systems are intended for Category 3 or Category 4 patient carerooms per 3.3.135.3 and 3.3.135.4.


Although I believe the intent of this was to limit Category 3 systems to minimal sedation, this wording makes moderate sedation permissible. Moderate sedation has the very real possibility of causing harm to a patient when the gas system fails, not just discomfort. Therefore I believe that this should be eliminated.

Please see the following thread on the NFPA exchange in regards to this: https://community.nfpa.org/thread/35281

In addition, it also contradicts the definitions put forth in chapter 15 for dental offices.

Respectfully, Jonathan L Wong


Submitter Full Name: Jonathan Wong

Organization: Coastal Pediatric Dental & Anesthesia

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Submittal Date: Sun Mar 04 10:44:12 EST 2018

Committee: HEA-PIP

Committee Statement




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5.3.1.4 Medical gas outlet and inlets in Category 3 spaces (see 3.3.135.1) shall be permitted to be suppliedfrom sources and through piping networks compliant with Category 1, 2 or 3.


Changes in the way the standard is treating "spaces" and the real possibility of Category 1, 2 and 3 spaces being supplied from the same sources suggests this provision needs to be clarified.








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5.3.3.2

Central Supply

OperationsSystem Location and Ventilation .

(1) Category 3

systems

System operations shall comply with 5.1.3.

2.

3


The title of this clause can be made more specific to reflect the section (s) referenced.




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5.3.3.5

Medical Air Supply Systems

.


Medical air outlets in Category 3 spaces may be supplied by any of the following:

1. A medical air central supply system compliant with 5.1.3.6

, except as follows:Medical air compressors, dryers, aftercoolers, filters, and regulators


3. A cylinder manifold compliant with 5.1.3.5.12

4. A cylinder header compliant with 5.1.3.5.10 provided with a means for pressure control compliant with5.1.3.5.5.1 except that these means shall be permitted to not be

simplex

redundant .



Changes in the way the standard is treating "spaces" requires that these sections be changed in turn. It is not a new allowance for a Category 1 source to supply a Category 3 space, but this proposed wording is intended to make that relationship more clear and explicit. This is seen in the usage "outlets in Category 3 spaces shall be permitted to be supplied"The new language explicitly speaks to the use of a manifold as source for Category 3. Notionally, these have always been permitted, the new language makes this specific.The new language explicitly speaks to the use of a cylinder header as a source for Category 3. Notionally, these have always been permitted, the new language makes this specific and adds the additional pressure control equipment needed to implement this.There is also a new allowance for a system composed of a compressor and cylinder header.




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement


Statement: This revision is a first step to differentiate between Category 2 and Category 3 Medical Gas systemswhich were treated exactly the same for the 2018 edition after all of the previous Category 3 materialwas moved to Chapter 15. Based on risk categories, there is less risk where Category 3 systems are


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used and therefore the systems do not need to be as complex as those for greater risk.


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5.3.3.6 Oxygen Central Supply Systems Using Concentrators.

Oxygen outlets in Category 3

oxygen supply systems using concentratorsspaces shall be supplied from concentrator systems compliant with 5.1.3.6 except that they shall bepermitted to

consist of two sources, one of which shall be a cylinder header with sufficient cylinder connections for oneaverage day’s supplyhave only one concentrator source .


Changes in the way the standard is treating "spaces" requires that these sections be changed in turn. It is not a new allowance for a Category 1 source to supply a Category 3 space, but this proposed wording is intended to make that relationship more clear and explicit. This is seen in the usage "oxygen outlets in Category 3 spaces shall be permitted to be supplied"




Street Address:

City:

State:

Zip:


Committee: HEA-PIP

Committee Statement




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5.3.3.7

Medical–Surgical Vacuum.


Medical Vacuum Supply Systems

Medical air outlets in Category 3 spaces may be supplied from any of the following:

1. A medical air central supply system compliant with 5.1.3.

7, except as follows:

Medical–surgical vacuum systems shall be permitted to be simplex.The facility staff shall develop their emergency plan to deal with the loss of medical–surgical vacuum.

6



Changes in the way the standard is treating "spaces" requires that these sections be changed in turn. It is not a new allowance for a Category 1 source to supply a Category 3 space, but this proposed wording is intended to make that relationship more clear and explicit. This is seen in the usage "outlets in Category 3 spaces shall be permitted to be supplied"




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5.3.3.8 WAGD . Central Supply Systems

WAGD inlets in Category 3

systems shall complyspaces shall be permitted to be supplied by any of the following:

(A) Any WAGD supply method compliant with 5.1.3.8

, except as follows:

Medical WAGD pumps shall be permitted to be simplex.The facility staff shall develop their emergency plan to deal with the loss of WAGD..

(B) Any WAGD supply method compliant with 5.2.3.8.


Changes in the way the standard is treating "spaces" requires that these sections be changed in turn. It is not a new allowance for a Category 1 source to supply a Category 3 space, but this proposed wording is intended to make that relationship more clear and explicit. This is seen in the usage "inlets in Category 3 spaces shall be permitted to be supplied"

The wording is also more comprehensive, extending to allow for any of the allowed WAGD implementations from Category 1 to be applied.




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5.3.3.9 Instrument Air Supply Systems.

Instrument air outlets in Category 3 systems shall comply spaces shall be permitted to be supplied by any of the

following:

(1) An instrument air central supply system compliant with 5.1.13.3.4

(2) An instrument air central supply system compliant with 5 . 1.13.3.4 except 5.1.13.4.4. Category 2systems shall be permitted to consist only of a single compressor.

(3) A cylinder manifold compliant with 5.1.3.5.12

(4) A cylinder header compliant with 5.1.3.5.10 provided with a means for pressure control compliant with5.1.3.5.5.1 except that these means shall be permitted to not be redundant.


Changes in the way the standard is treating "spaces" requires that these sections be changed in turn. It is not a new allowance for a Category 1 source to supply a Category 3 space, but this proposed wording is intended to make that relationship more clear and explicit. This is seen in the usage "outlets in Category 3 spaces shall be permitted to be supplied"

An additional allowance for Category 2 and 3 would be use of a basic cylinder header with the additional pressure control equipment needed to implement this.




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Public Input No. 186-NFPA 99-2018 [ New Section after 5.3.14 ]

5.4 Laboratory Piped Medical Gas and Vacuum Systems

5.4.1 Applicability

5.4.1.1 These requirements shall apply to laboratories with medical gas and vacuum inlets/outletswhere the sources for medical gases, medical vacuum or medical support gases are also supplyinginlets/outlets in clinical spaces.

5.4.2 Nature of Hazards. The requirement of 5.1.2 applies equally to medical gas and vacuumsystems piped into laboratory spaces. Additionally, laboratories are subject to their own uniquehazards related to the nature of the work done there which can compromise the medical systems.

5.4.3 Central supply systems and distribution pipelines serving both medical and laboratory spacesshall comply with all the requirements for the highest category in any medical space served.


This proposal follows on discussions in the Task Groups suggesting a Category 4 for Laboratories should be reinstated. It is meant to encourage discussion on a more extensive section.




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Statement: This revision re-introduces provisions applicable to piped medical gas and vacuum systems forlaboratory use in health care facilities. This topic was addressed in NFPA 99 up to the 2005 editionwhen all laboratory requirements were removed from the code and replaced with a reference to NFPA45. In the years since, these piped systems have not been included or addressed by NFPA 45 oranywhere else, leaving users searching for guidance. The language provided is a starting point foronce again including requirements for these types of systems for laboratory use which is a commonoccurrence in health care facilities.


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5.3.14 Operation and Management.

(1) Facilities operating Category 3

systemsmedical gas, vacuum and supports gases shall comply with 5.1.14

(2) Facilities using Category 3 Medical Air, Vacuum, WAGD or Support gas systems with simplex sourcesof supply shall develop their emergency plan to deal with the loss of medical gas .


This provision is moved from the sections on equipment to the "Operations" section.




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Public Input No. 20-NFPA 99-2018 [ Section No. 15.3.1 [Excluding any Sub-Sections] ]

Facilities that perform deep sedation and general anesthesia associated with implant dentistry and oralsurgery dental treatment shall meet the requirements for Category 1 dental gas and vacuum systems.


I have been an advocate for NFPA 99 Standards in dentistry and lecture on this topic. Since the release of NFPA 99 2018 edition, we have had numerous pediatric dentists and general dentists claim that the standards do not apply to them if they are not providing implants or oral surgery. In dentistry, oral surgery is often considered the specialty of Oral and Maxillofacial Surgeons. Oral surgery also refers to extraction of teeth. As such, many dental professionals claim that restorative dentistry such as crowns, fillings, bridges or gum surgery does not apply. For example, dental offices doing intubated general anesthesia or sedation on children for restorative dentistry as stating that they are exempt from NFPA 99 because they don't provide implants or oral surgery. Nevertheless, the risk to these patients is the same based on the depth of sedation / anesthesia they are receiving.


Submitter Full Name: Jonathan Wong

Organization: Coastal Pediatric Dental & Anesthesia

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Submittal Date: Sun Mar 04 10:48:54 EST 2018

Committee: HEA-PIP

Committee Statement


Statement: This has been revised to eliminate any interpretations that the code only applies to dental facilitiesproviding implant dentistry and oral surgery. It should be applied to any dental treatments providingsuch a level of anesthesia.


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15.3.2.11 Medical Support Gases.

Category 1 systems shall comply with 5.1.13 except as follows:

(1) Nitrogen source equipment shall be permitted to be installed in enclosures for Category 3 medicalgases or in a mechanical room.

(2) Nitrogen source equipment shall include the following:

(3) One or more cylinders of nitrogen NF, each providing at least one average day’s supply

(4) A manifold, if primary and secondary cylinders are provided

(5) A line pressure regulating valve

(6) A check valve downstream from the pressure regulating valve

(7) A pressure relief valve set at 50 percent above the normal line pressure and located downstreamfrom the check valve

(8) A pressure relief valve discharge piped to outdoors at a point that will not create a probablehazard and that is turned down to prevent the entry of rain or snow


Adding Medical Support Gas is the correct name defining this gas.







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15.4.2.4.6

If enclosures are outdoors or remote from the treatment facilities that they serve, they shall be kept locked.

Add in Annex A:

A15.4.2.4.6 Remote Dental Manifold Location

Insert diagram and text from Figure A.5.3.12, Examples of Storage / Suppply Enclosures from the 2012edition.



remote_dental_manifold.JPG Remote Dental Manifold Location


This helps clarify when the rules for remote dental manifolds come into play. 1. Lock the door. 2. Automatic switching manifold. 3. Changeover alarm 4. Emergency Shutoff Valve in Single Treatment Facility(ies) 5. High/Low switches on patient side of Emergency Shutoff Valve




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Committee: HEA-PIP

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Statement: This helps clarify when the rules for remote dental manifolds come into play.

1. Lock the door.

2. Automatic switching manifold.

3. Changeover alarm

4. Emergency Shutoff Valve in Single Treatment Facility(ies)

5. High/Low switches on patient side of Emergency Shutoff Valve


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15.4.2.5.9

Flexible connectors of other than all-metal construction that connect manifolds to the gas distribution pipingHoses and flexible connectors both metallic and nonmetallic shall not exceed 1.52 m (5 ft) in length andshall not be concealed or penetrate walls, floors, ceilings, or partitions. Source equipment shall not beconnected to the piping system through flexible connectors.


I do not believe that it was ever the intent of the committee to allow a manifold to be connected to the piping system with a flexible connector.




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Statement: Revised to clarify that it is not permitted for a manifold to be connected to the piping system with aflexible connector.


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15.4.2.6.1*

Where a central medical gas supply is remote from a single treatment facility, the main supply line shall beprovided with

All Category 2 Medical Gas systems shall have an emergency shutoff valve

located in the single treatment facility

so as to be accessible from all use-point locations in an emergency.


Since currently there is no valves required in a Cat. 2 non-remote medical gas system this would give every facility access to shutdown their system in an emergency without going to the medical gas storage room.




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Statement: Since currently there is no valves required in a Cat. 2 non-remote medical gas system this would giveevery facility access to shutdown their system in an emergency without going to the medical gasstorage room.


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15.4.4.5 Piping for Nitrogen medical support gas .

Nitrogen Medical Support Gas piping in dental facilities shall comply with 15.4.4.2, including cleaning foroxygen service.


Medical support gas by definition includes both Nitrogen and Instrument Air.







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(3) Oxygen piping shall be at least 1 size larger than piping for nitrous oxide.


This addition safeguard is critical for Cat 2 dental offices. In some areas of the country these dental offices lack the same occupancy permitting process that Category 1 facilities are required to complete. In many cases these systems are not verified and not installed by ASSE 6010 personnel.




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Statement: This addition safeguard is critical for Cat 2 dental offices. In some areas of the country these dentaloffices lack the same occupancy permitting process that Category 1 facilities are required tocomplete.


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Public Input No. 126-NFPA 99-2018 [ New Section after A.3.3.27 ]


A.3.3.XX Compressed Medical Gases (CMG).CMG classifications are defined in 201(g)(1) of the Federal Food, Drug, and Cosmetic Act,

21USC321(g)(1). This includes gas(es) recognized in the current USP-NF or supplement(s) andgas(es)

intended for direct use or as a component of a gas(es) in the diagnosis, cure, mitigation, treatment,or

prevention of diseases in man or in animals that achieves its intended purpose through chemicalrather than physical means. [55;2020]


PI-124 added the definition, so this PI adds the accompanying annex note from NFPA 55.



Public Input No. 124-NFPA 99-2018 [New Section after 3.3.28]

Public Input No. 124-NFPA 99-2018 [New Section after 3.3.28]





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Statement: The term "CMG" is used in new material extracted from NFPA 55, so the term should be in thedefinitions.


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Public Input No. 230-NFPA 99-2018 [ Section No. A.5.1.3.3.2 ]

A.5.1.3.3.2

Electric wiring and equipment in storage rooms for oxygen and nitrous oxide are not required to beexplosionproof.

Paragraph 5.1.3.3.4 on Storage, which clearly needs to be retroactive, references 5.1.3.3.2. Noteverything in an existing storage room may comply with 5.1.3.3.2. Therefore note that 5.1.3.3.4 does allowaprved existing installations to be permitted to be continued in service. That is not flat out exception. Eachof the items should be evaluated considering the provisions of 1.3.2.3 that the lack of compliance mustconstitute a distinct hazard to life.

Add the current A.5.1.3.3.2 as the first sentence to the exis ng A.5.1.3..2(8)


Currently 5.1.3.3.4 Storage is retroactive. It needs to be so that in existing facilities storage is not anywhere someone wants it. However, it is important to remind the user that Chapter 1 limits retroactivity, especially with regard to construction and equipment. This new annex note will clarify that existing facilities might not have every thing in 5.1.3.3.2 and the resulting hazard must be evaluated.



Public Input No. 208-NFPA 99-2018 [Section No. 5.1.1.5]PI 208 is clearly dealing with the sameissue

Public Input No. 231-NFPA 99-2018 [New Section afterA.5.1.3.3.2(15)]




Affiliation: None

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Committee: HEA-PIP

Committee Statement

Resolution: The changes to 5.1.1.5 include all of 5.1.3.3.2 as applicable to existing installations. Therefore thisannex note is not needed.


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A.5.1.3.3.2

Electric wiring and equipment in storage rooms for oxygen and nitrous oxide are not required to beexplosionproof.


The NFPA 99 handbook states that there was a belief in certain circles that manifold rooms were required to be built to explosion proof requirements based on the provision that electrical devices be installed a minimum of 5 ft above the floor. To remove the confusion, the 5 ft requirement was clarified via A.5.1.3.3.2(5) to explain electrical devices should be physically protected or by location of the device 5 ft above the floor. The statement in the handbook implies that explosion proof lighting is not required, however A.5.1.3.3.2 states that explosion proof lighting is not required for oxygen and nitrous oxide. Other gases are not addressed such as carbon dioxide, nitrogen, etc. The annex note as currently written seems to recommend explosion proof lighting in central supply systems and medical gas storage rooms that house gases other than oxygen and nitrous oxide.


Submitter Full Name: Lennon Peake


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Committee: HEA-PIP

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Statement: The annex has been revised to clarify that explosionproof fixtures are not needed for medical gasstorage rooms that house any gas- not just nitrous oxide and oxygen as could have previously beenimplied.


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Public Input No. 255-NFPA 99-2018 [ Section No. A.5.1.3.3.2(7) ]

A.5.1.3.3.2(7)

The test fire resistance rating for walls and floors is determined in accordance with ASTM E119, StandardTest Methods for Fire Tests of Building Construction and Materials, or UL 263, Fire Resistance Ratings. Thetest fire protection rating for doors is determined in accordance with NFPA 252.


clarification


Submitter Full Name: Marcelo Hirschler

Organization: GBH International

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Committee: HEA-PIP

Committee Statement


Statement: Revised to used more appropriate terminology.


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Public Input No. 229-NFPA 99-2018 [ New Section after A.5.1.3.3.2(15) ]


A.5.1.3.3.4.2 Exhaust fan motors, fan-coil motors, or similar small motors used for ventilation purposes are not

intended to be prohibited from the storage enclosure.


Some installations of central supply locations include exhaust fans in the room for ventilation. These can be electrically motor-driven pieces of equipment but not necessarily the machinery intended to be prohibited by the section. This annex material helps to clarify this.




Affiliation: None

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Statement: PI 229


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Public Input No. 231-NFPA 99-2018 [ New Section after A.5.1.3.3.2(15) ]


Add a new:

A.5.1.3.3.3 Paragraph 5.1.3.3.4 on Storage, which clearly needs to be retroactive, references 5.1.3.3.3. Noteverything in an existing storage room may comply with 5.1.3.3.3. Therefore note that 5.1.3.3.4 does allowapproved existing installations to be permitted to be continued in service. That is not flat out exception. Each of the items should be evaluated considering the provisions of 1.3.2.3 that the lack of compliancemust constitute a distinct hazard to life. Also see 9.1.3 and 9.3.6.5.3.4


See PI 230



Public Input No. 230-NFPA 99-2018 [Section No. A.5.1.3.3.2] Clearly related




Affiliation: None

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Resolution: Same as PI 230


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A.5.1.14.2.3

The following should be considered in a routine testing, maintenance, and inspection program:

(1) Medical air source, as follows:

(a) Room temperature

(b) Shaft seal condition

(c) Filter condition

(d) Presence of hydrocarbons

(e) Room ventilation

(f) Water quality, if so equipped

(g) Intake location

(h) Carbon monoxide monitor calibration

(i) Air purity

(j) Dew point

(2) Medical vacuum source — exhaust location

(3) WAGD source — exhaust location

(4) Instrument air source — filter condition

(5) Manifold sources (including systems complying with 5.1.3.5.10, 5.1.3.5.12, 5.1.3.5.13, and 5.1.3.5.14),as follows:

(a) Ventilation

(b) Enclosure labeling

(6) Bulk cryogenic liquid source Cryogenic fluid central supply system source inspected in accordancewith NFPA 55

(7) Final line regulation for all positive pressure systems — delivery pressure

(8) Valves — labeling

(9) Alarms and warning systems — lamp and audio operation

(10) Alarms and warning systems, as follows:

(a) Master alarm signal operation

(b) Area alarm signal operation

(c) Local alarm signal operation

(11) Station outlets/inlets, as follows:

(a) Flow

(b) Labeling

(c) Latching/delatching

(d) Leaks

(12) Medical gas quality

(13) Purity — Percent Concentration

(14) Permanent particulates and contaminants

(15) Odor and moisture


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Committee Statement




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public input no. 329-nfpa 99-2018 [ global input ......public input no. 269-nfpa 99-2018 [ section...

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