subgroup on boilers - national board of boiler and pressure … meetings... · 2017-03-20 ·...

Date Distributed:

SUBGROUP ON BOILERS

Minutes

Meeting of January 14, 2014 San Antonio, TX

“These minutes are subject to approval and are for committee use only. They are not to be

duplicated or quoted for other than committee use.”

The National Board of Boiler & Pressure Vessel Inspectors 1055 Crupper Avenue

Columbus, Ohio 43229-1183 Phone: (614)888-8320 FAX: (614)847-1828

1. Call to Order – 8:00 a.m.

Vice Chairman, Mr. Brian Moore called the meeting to order at 8:00 a.m. 2. Announcements

All members and visitors introduced themselves and an attendance sheet was passed around for attendees to review and sign.

Wednesday evening tour of the Alamo at 5:30 p.m. with a reception to follow in Alamo Hall. All those attending were asked to indicate so, on the applicable signup sheet.

Thursday morning continental breakfast at 7 a.m. and lunch at 11:30 a.m. in the Stetson Room. All those attending were asked to indicate so, on the applicable signup sheet.

3. Adoption of the Agenda

Add the following as New Business: o The idea of combining Subgroups into one o New Action Item – B. Moore – with regard to Part 1, 2.2.7.3 o Elect new TG Project Managers on items to replace Gary Scribner

There was a motion to adopt the Agenda as published with the New Business Items. The motion was unanimously approved.

4. Approval of Minutes of July 16, 2013

There was a motion to approve the Minutes of July 16, 2013 as published. The motion was unanimously approved.

5. Review of the Roster (Attachment 1 pp. 6-11)

Mr. Gary Scribner resigned from all subgroup and subcommittee work due to his new position with the National Board. A majority vote will be taken in the SC meeting for a new Chairman for SG on Boilers.

Mr. Stanley Konopacki and Don Patten are up for reappointment to the SG on Boilers. A majority vote will be taken in the SC meeting.

Addition:

o Mr. Harold Tyndall retired with this being his last meeting. Mr. Todd Creacy was in attendance and was named as the replacement for Mr. Tyndall on SG Boilers and Pressure Vessel & Piping. His resume has been submitted and a majority vote will be taken in the SC meeting.

o Add Edward Wiggins to the Attendance Sheet o Update Paul Bourgeois address information to the Attendance Sheet

There was a motion to approve the roster as published with the addition. The motion was unanimously approved.

6. Action Items (Attachment 2)

NB08-2101 Part 1 SG on Boilers - CSD-1 does not address solid fuel firing and it would be appropriate for the NBIC to look into it. A task group of G. Halley (Project Manager), M. Richards, H. Tyndall, R. Snyder, G. Scribner and B. Moore have been assigned. (Attachment 2, pp. 12-16)

January 2014 Remove H. Tyndall, R. Snyder and G. Scribner from the TG. Mr. Geoffrey Halley presented an updated proposed draft for review and comment of “Part 1 Section 6 Supplement 4 - Installation of Biomass (Wood/Solid Fuel) Fired Boilers”. Discussion took place and changes were agreed upon. Mr. Halley will incorporate the changes and submit to the SC and then to the MC for approval to be sent out as a vote letter ballot.

NB10-1201 Part 1, SG Boilers - Request for a format change to Part 1 Installation. A TG of G. Scribner M. Wadkinson (Project Manager), B. Moore, S. Konopacki, D. Patten, and E. Wiggins were assigned. (No Attachment)

January 2014 Remove G. Scribner from the TG. Add M. Wadkinson (Project Manager) and E. Wiggins to the TG.

Mr. Gary Scribner presented an overview to the SG and agreed to gather information as to the wording commonalities and requirements for format change to give to the TG. The TG will then take this information and prepare a proposal to present by the next meeting of July 2014.

NB12-1401- Part 1, SG on Boilers - Reference item NB09-0204. Address the installation of Potable Water Heaters. A task group of G. Scribner (Project Manager), P. Bourgeois (Project Manager) and B. Moore, and H. Tyndall were assigned. (Attachment 2, pp. 17-20) January 2014 Remove G. Scribner and H. Tyndall from the TG. Name P. Bourgeois as Project Manager.

Mr. Paul Bourgeois presented the results of the letter ballot for comment. The negative comments were addressed and resolved. There was a motion to move the proposed wording change forward to the SC and then to the MC for approval. The motion was unanimously approved. NB13–1101 – Part 1, SG Boilers – Addition of installation requirements for condensing hot water boilers. A TG of G. Halley (Project Manager), M. Wadkinson, D. Patten, B. Moore, P. Bourgeois and R. Snyder were assigned. (Attachment 2, pp. 21-22) January 2014 Remove R. Snyder from the TG. Mr. Geoffrey Halley presented a progress report and an updated proposed document of an “Outline of Proposed Installation Requirements for Condensing Boilers”. A break-out session was held to discuss the proposed document in more detail. Melissa and Geoffrey will meet to expand on the list and have a proposal to present by the July 2014 meeting. It was noted that Part 2 Inspection may need to also be involved.

NB14-0401- Part 1, 2.5.3, SG Boilers - Part 1 Installation does not require lockable disconnects. Wording needs to be added to become more uniform with other codes and standards. A task group of P. Bourgeois (Project Manager), M. Wadkinson and E. Wiggins were assigned. (Attachment 2, pp. 23-24) January 2014 Mr. Paul Bourgeois presented new wording change. There was a motion to move the proposed wording change forward to the SC and then to the MC for approval. The motion was unanimously approved. NB14-0402- Word Change of Boiler Room to Equipment Room throughout Part 1. A TG of M. Wadkinson (Project Manager), S. Konopacki, B. Moore and P. Bourgeois were assigned. (Attachment 2, pp. 25-42) January 2014 Add B. Moore to the TG. Ms. Melissa Wadkinson presented a proposed new definition for “Equipment Room”. In addition to the proposed definition, a find and replace of the word Boiler Room to Equipment Room was done and proposed throughout Part 1. The affected pages were presented. Discussion took place and changes were made to the proposed new definition. There was a motion to move the proposed new definition and word replacement forward to the SC and then to the MC for approval. The motion was unanimously approved.

NB14–0403 – Part 1 – Index proofing. A TG of B. Moore (Project Manager), G. Scribner and H. Tyndall T. Creacy, K. Watson and M. Washington were assigned. (No Attachment)

January 2014 Remove G. Scribner and H. Tyndall from the TG. Add T. Creacy, K. Watson, and M. Washington to the TG.

Mr. Brian Moore presented an overview of who, what, and why expectations to take place with regard to proofing of the index of Part 1.

7. New Business (Attachment 3, pp. 43-45)

Combining Subgroups The SG discussed the pros and cons and expressed their “ in favor of” the idea of combining SG

Boilers and SG Pressure Vessel & Piping into one SG, to be called SG Installation. New Action Item - NB14-1501 (Attachment 3, pp. 43-45)

Part 1 Section 2.7.3 Steam Supply and 2.9.6 Mounting and Discharge Requirements. It is the "gravity drain" that shall be ample not the "provision". This is also consistent with ASME language in Section I and language adopted by SG Historical Boilers. Brian Moore presented a word change proposal. There was a motion to move the proposed word change forward to the SC and then to the MC for approval. The motion was unanimously approved.

Electing new TG Project Managers on items to replace Mr. Scribner As the SG went through each action item on the agenda, additions, deletions, and changes were made

accordingly to assigned Task Groups.

8. Future Meetings

July 14-18, 2014, Columbus, Ohio January 19- 22, 2015, Orlando, Florida

9. Adjournment The meeting adjourned at 11:10 a.m.

Respectfully Submitted, Jeanne Bock Secretary

Attachment 1 - Roster & Resume

PAGE 2


PAGE 3

TODD CREACY 171 Crestwood Lane

Springtown, TX 76082 (817) 403-4601 (817) 677-5482

[email protected]

EMPLOYMENT HISTORY:

2004-Present Zurich Services Corporation Dallas, TX

Boiler & Machinery – Regional Manager (2012 – Present)

Performed the following duties while working as a home based consultant in Springtown, TX:

Responsible for operations, sales, and account management within the South Central (7 states) region of the Risk Engineering - Machinery Breakdown Division

Manage a team of highly skilled professionals that provide a full range of risk management services to organizations that self-insure property/casualty exposures or that purchase insurance services independently. Services may include assessment of property/casualty risk exposures; identifying risk improvement strategies by conducting surveys and analyses; preparing reports which form the basis of underwriting, claim, and other insurance decisions to identify and manage risk exposures. Other services include jurisdictional inspections, risk assessment surveys, loss investigations, marketing, and training

Manage relationship with key customer/area of responsibility Develop or enable the development of new and expanding business opportunities Design, recommend and implement changes to processes, systems Develop and implement annual budget for area of responsibility Set and execute operational objectives and plans aligned to the overall strategy Ensure that appropriate documentation, implementation and communication of established policy,

procedures and operating standards is completed for area of responsibility. Markets Zurich and its capabilities to current and potential customers. Assigns appropriate personnel to assist underwriters with proposals and budgeting for prospects

and renewing accounts. Complete the performance management cycle with staff, including providing coaching and

feedback for improved performance. Responsible for contributing to the overall growth of the company with respect to fee income, new

premium, and premium renewals.

Boiler & Machinery Risk Consultant & PE (2004-2012)

Performed the following duties while working as a home based consultant in Springtown, TX:

Provided consultative services to various customers with a wide range of operations. This included a comprehensive survey of the overall operation, production equipment, essential services, maintenance procedures (predictive and preventive), contingency planning, equipment redundancy, critical spares, and other exposures that could affect business interruption and/or equipment reliability.


PAGE 4

Rapidly advanced from 4T – Risk Consultant position to the 6T - Portfolio Engineer position. The PE has the responsibility to evaluate all B&M and All Risk Policy submissions for our Dallas UW partners and to provide a prospect account analysis with recommended engineering services and cost estimate for each. Currently oversee applicable services on approximately 125 accounts and $35M combined premium.

Restored and improved confidence with our Underwriting partners by providing routine collaboration, consultation, and beneficial prospect proposals, which helped establish or forge the relationship between our internal business partners and risk engineering.

Conducted renewal account analysis to provide underwriting with a summary of annual services, recommendations, risk exposures and recommended renewal strategy for current policies.

Reduced unnecessary expenses to underwriting and increased profitability by providing accurate fee quotes, and ensuring that all servicing stopped once the account was non-renewed.

Teamed up with our underwriting partners on numerous occasions to market our risk engineering products and services to various clients and/or producers/brokers.

Conducted claim investigations. Collaborate with customers and business partners to develop advanced service plans Acted as mentor and trainer with respect to Account Coordination, Risk Assessments,

Refrigeration Surveys, Claim Investigations, etc. Acted as mentor for individuals within our associates program Responsible for selecting Account Engineers based on account complexity and coordination

requirements. Acted as liaison between upper management and the Machinery Breakdown Portfolio Engineer

team Developed and presented various training sessions such as Account Coordination, Claim

Investigations, Customer Service Plans, etc. Participated in various projects and/or procedure developments such as NB369 certification,

Renewal and Prospect Account Analysis Procedures, Operation Transformation, Forging – UW Guidelines, B&M Manual Revision Reviews, RULE/STOP Procedures, Customer Service Plan Template, etc.

2000-2004 Hartford Steam Boiler Inspection & Insurance Company - Atlanta, GA Boiler & Machinery Inspector (2000-2004)

Performed the following duties while working as a home based inspector in Winterville, NC:

Responsible for conducting jurisdictional inspections for boilers, pressure vessels, and other machinery in accordance with NC State Law, NBIC, and sound engineering judgment. Territory of responsibility was 25 counties in the northeast section of North Carolina which included the inspection of approximately 2000 jurisdictional objects per year.

Provide and document ongoing loss prevention consultation for a wide variety of occupancies to help identify underwriting exposures beyond those anticipated, and to provide recommendations for correcting conditions that create a high probability of failure.

Visit various accounts to follow-up on previously submitted recommendations, and evaluate changes in exposure to help minimize equipment breakdowns, and unscheduled outages.

Perform Property/Casualty loss control inspections for client companies to help meet their underwriting needs. The survey and reports include but not limited to fire protection features, security, constructions, hazards, and commercial auto procedures.

Conduct claim investigations to evaluate, gather information, and develop reports documenting all events to assist claim manager in assessing liability, value, and recommendations to help prevent a re-occurrence in the future.


PAGE 5

Intricately involved with the development, implementation, and certification for the NB-369 requirement. After certification also acted as the Southeast Regional Representative

Major Accomplishments:

Obtained the “National Board Inspection Code” Commission. Obtained the Property/Casualty Inspector Certification. Obtained a North Carolina Dept. of Labor Commission. Consistently maintained designated territory above 95% current, and always met or exceeded set goals. Self-Study Course in “Internal Combustion Engines.” Self-Study Course in “Claim Investigations.” Self-Study Course in “Risk Based Evaluations.”

1995-2000 THE ROBERTS COMPANY Winterville, NC. A leading industrial fabrication and construction company specializing in pressure vessels, heat exchangers, piping components, boilers, coils, towers, scrubbers, conveyers and many other industrial products. The company has approximately 220 employees and maintains ASME code stamps “U”, “S”, and “R”

QC/QA Technician/Assistant QC Manager/Interim QC Manager (1997- 2000)

Performed the following duties while working in this position:

Inspect material for all jobs to insure proper grade, size, marking and that the mill test reports meet chemical and physical requirements of ASME Section II.

Research, develop and maintain all Weld Procedure Specifications and Procedure Qualification Records in accordance with ASME Sec. IX. Approximately 150 procedures in the program. Also tested and certified welders for new employment and develop WPQ’s for the shop and field.

Perform calibration test and prepare reports for all test gauges, calipers, and micrometers. Fill in for Q.C. Manager in his absence by developing travelers, data reports, scheduling and

working with A.I. and attending fabrication meetings. Use blueprints to inspect jobs for proper fit-ups, weld joint design, filler metal selection, and

testing requirements insuring that they meet code requirements, customer specifications, and shop standards.

Inspect welds or base metal for discontinuities using VT, PT, RT, MT and UT methods. Assist in preparation and intricately involved with for (2) National Board code audits to receive

stamp renewals. Served as “shop superintendent” on weekend rotations supervising all aspects of fabrication while

overseeing between 10 – 100 employees at any given time.

Material Controller (1995-1997)

Revamped and implemented a much needed procedure change in the material trace ability program to meet ASME code and company requirements. Insured that procedures were followed in order to maintain trace ability throughout all phases of fabrication.


PAGE 6


Achieved AWS (American Welding Society) Certified Welding Inspector status. NDE Certs. In PT (Level II), MT (Level II), UT (Level II), RT (Level I). Increased operational efficiency by drastically reducing non-conformances. Sacrificed significant overtime for the continued success of the company. Averaged approximately 800 hrs overtime (2800 hrs. total) each of my 6 years at the facility, which is essentially 2.5 extra years of work within a 6 year period based on a 2080 hr work year.

1991-1995 UNITED STATES MARINE CORP

Sergeant

Trained, supervised, and led anywhere from 5-40 marines in various duties from the operation and troubleshooting of many different radio systems to deploying and conducting successful field operations. Conducted formal evaluations and leadership training of subordinates. Performed various other duties that go along with being Sgt. In the USMC.


Finished top of class at Field Radio Operators school out of approximately 50 individuals. Meritoriously promoted to E-4 (Corporal). Advancement to E-5 (Sergeant) in less than 3 years. Received Secret Clearance for handling cryptographic material. Navy Achievement Medal Honorable Discharge

EDUCATION:

Graduate of Broken Bow High School (Top 10% of class) Broken Bow, OK United States Marine Corp 1991-1995 Partial college curriculum for “Industrial Systems Technology” Achieved AWS (American Welding Society) Certified Welding Inspector status. NDE Certs. In PT (Level II), MT (Level II), UT (Level II), RT (Level I). Obtained NB Com mission Obtained Jurisdictional Commissions in NC, GA, MS, AR, LA, TX, OK, CO

References available upon request.


PAGE 7

NB08-2101

1

Part 1, Section 6 Supplement 4

Installation of Biomass (Wood/Solid Fuel) Fired Boilers

(Draft for Review and Comment January 2014)

S4.1 – Scope

NBIC Part 1, Section 6, Supplement 4 provides requirements for the installation of Biomass (Wood/Solid Fuel) Fired Boilers as defined in NBIC Part 1, Glossary.

S4.2 PURPOSE a) The purpose of these rules is to establish minimum requirements, for the installation

of Biomass Boilers. b) It should be recognized that many of the requirements included in these rules must be

considered in the design of the boiler by the manufacturer. However, the owner-user is responsible for ensuring that the installation complies with all the applicable requirements contained herein. Further the installer is responsible for complying with the applicable sections when performing work on the behalf of the owner user.

c) This supplement provides requirements for the installation and control of boilers which use biomass as a major fuel component and will address the differences that occur when solid fuels, such as Biomass, are being used. Thus the primary thrust of this section will be directed toward the control of the fuel handling and distribution systems.

d) Fuels will vary widely depending upon source, moisture content, particle size and distribution, however once the fuel has been established, the owner-user should adhere to the original specification, as closely as possible in order to minimize handling, combustion and emissions problems.

e) Additionally the emissions control equipment is designed around the initial fuel specification. Any changes in fuel fired will impact on the performance of the various elements of the emissions control system.

f) Biomass boilers and boiler rooms require additional considerations than traditionally fueled boilers that may include

Transportation of the fuel from a storage facility to a metering device within the boiler room

Transportation of the metered fuel to the boiler, for distribution to a combustion system whether it be a grate upon which the combustion takes place, a bubbling fluidized bed, circulating fluidized bed or suspension burner.

PAGE 12

Attachment 2 - NB08-2101

NB08-2101

2

In grate based combustion systems combustion air is typically divided into an underfire air system and an overfire air system, each of which must be closely controlled in order to produce clean, efficient combustion.

Induced draft fans to overcome the pressure drop of the emissions control equipment

A fly ash or carbons recycle system, to return unburned carbon to the combustion zone.

An ash removal system, to move ash from the boiler and emissions control equipment to suitable cooling and storage area.

S4.3 – Determination of Allowable Operating Parameters

The allowable operating parameters of the combustion side shall be installed in accordance with jurisdictional and environments requirements, manufacturer’s recommendations, and/or industrial standards, as applicable.

S4.4 – General Requirements

a) Power Boilers utilizing biomass as the primary fuel source shall meet the requirements of NBIC Part 1, Section 2 and this supplement.

b) Steam Heating, Hot Water Heating, and Hot Water Supply Boilers utilizing biomass as the primary fuel source shall meet the requirements of NBIC Part 1, Section 3 and this Supplement.

S4.5 – Fuel System Requirements and Controls

a) Fuel Transport Systems shall address preserving fuel particle size distribution, fire prevention, and the suppression of fires or explosions. In a single installation various types of fuel transportation systems may co-exist, the most common systems are

Conveyor systems- In these systems fuel is dropped onto a moving belt, bucket elevator, drag link conveyor or a screw or auger mechanism. Speed of the conveyor may be varied to meet fuel demand.

Lean phase pneumatic systems - In these systems fuel is dropped into a moving airstream, mixes with the air, and travels through a pipe at a velocity of approximately 5000 ft/min. Air pressures are in the region of 25 inches water column.

Dense phase pneumatic systems – An intermittent or batch feed system, in which fuel is dropped through a valve (dome valve) into a pressure vessel. When the vessel is filled, the valve is closed, air at a pressure between 30

PAGE 13


NB08-2101

3

to 100 psig is admitted and the fuel leaves the vessel in the form of a “slug”. The sequence then repeats. (Note that these systems are also used for ash handling.)

a) Fuel Transport Solid Fuel Metering Systems vary depending upon the fuel used and the particle size distribution, these metering systems include but are not limited to:

Variable speed augers Variable speed, helically flighted, augers can be located in the bottom of a fuel metering bin. Alternatively they could be a part of a retort type stoker. The auger dimensions, flighting, and speed range are selected on the basis of fuel being burned, its size range, heating value and required boiler turndown range. The metered fuel typically is then dropped into the throat of a venturi, (or in some cases a plain pipe) though which the fuel transport air flows to carry the fuel into the boiler combustion zone, for distribution on a grate, upon which the burning of the fuel takes place.

Variable speed air-lock valves This valve is basically a rotating slotted cylinder, operating within an outer cylinder, suitably sealed to prevent leakage. Rotational speed and slot dimensions can be varied to accommodate changes in fuel flow rate. The fuel passing through the valve, typically, is deposited onto a moving grate type stoker.

Variable stroke rams This is another device that can be located on the bottom of a metering bin, is typically used on smaller units and is essentially a batch feed mechanism. The stroke of the ram is adjusted to set fuel flow rate.

S4.6 – Combustion Requirements

a) Overfire Air/Underfire Air Distribution When solid fuels are burned on a grate, rather than in fluidized bed units or in suspension, it is normal practice to introduce some of the combustion air under the grate, or bed, and the remainder over the bed. In many cases fuel transport air becomes a part of the over-the-bed combustion air. The proportioning of the overfire to underfire airflow rates is dependent upon several factors, such as fuel particle size, fuel density, burn rate and volatiles. In general the objective is to get as complete a burn on the grate as possible, without creating large quantities of particulate emissions, and then using the overfire air to complete burning of the volatile and small particulate matter, leaving the fuel bed. Loss of combustion air from either the underfire or overfire source shall cause shutoff of the fuel supply and a lockout condition. The control system shall be capable of maintaining the correct relationship between underfire air and overfire air, over the complete firing range of the boiler, while promoting complete burning with minimum particulate emissions.

PAGE 14


NB08-2101

4

b) Programming Controls Programming controls may be relay based, or on more current units, PLC based. Interactive graphics displays may also be incorporated into the system. Access to PLC based controls and interactive graphic displays shall be limited to qualified individuals and password protected. PLC functions shall be confined to the normal boiler operating logic, covering startup, interlocks, and normal shutdown sequences. PLC logic shall not interfere with, or over-ride safety controls, which cause boiler safety shutdown when activated. Consideration should be given to having the PLC logic comply with the requirements of NFPA-85.

c) Pre-firing Checks/interlocks In addition to the Safety Controls defined in Section 4.5 and 4.6 proof of air handling fans or blowers are operating properly shall be required. This includes:

Induced draft fans Fuel transport fans Underfire air and Overfire air fans, and Carbon, or flyash, re-injection fans.

In cases where variable speed drives are used on fans, the combustion system manufacturer’s instructions shall be followed in terms of the allowable upper and lower limits of the power supply frequency (Hz).

d) Pre-purging Pre-purging the boiler and its venting system shall be required. Unless defined otherwise by the manufacturer of the fuel burning equipment, the pre-purge may be achieved by operating the induced draft fan prior to starting the remaining fans in the installation. Purge air volume shall be set during commissioning by the combustion system manufacturer, or the manufacturer’s representative, in accordance with applicable Codes or Standards and shall not be capable of being reset by operating personnel.

e) Ignition Systems Solid fuel ignition systems and/or methods can vary from the placement of manually ignited, oil soaked rags on the fuel bed, to gas or oil fired pilot burners or lances but in all cases shall be in accordance the manufactures recommendations.

f) Firing Rate Control and Fuel/Air Ratio Control The control system shall be capable of maintaining the desired air to fuel ratio over the entire firing range of the boiler, while promoting clean, stable combustion.

PAGE 15


NB08-2101

5

g) Re-injection Systems In installations where fly ash is re-injected from a multi-cyclone collector into the combustion zone for carbon re-burn; precautions should be taken to ensure that plugging of the reinjection pipe work does not occur. Consideration should be given to installing cleanouts in the pipe work.

h) Shutdown and Post Purge Unless the boiler manufacturer’s instructions state otherwise, the fuel supply shall be terminated at shutdown, and the overfire air should remain on until the fuel bed is burned out, and the residue cooled.

New definitions

Conveyor system(s) - A fuel transport system utilized on biomass boilers that drops fuel onto a moving belt, bucket elevator, drag link conveyor or a screw or auger mechanism. (The Speed of the conveyor may be varied to meet fuel demand.) Lean phase pneumatic system(s) - A fuel transport system utilized on biomass boilers that drops fuel into a moving airstream, mixes with the air, and travels through a pipe at a velocity of approximately 5000 ft/min. Air pressures are in the region of 25 inches water column. Dense phase pneumatic system(s) – A batch feed transport system used on solid fuel fired boilers for both fuel delivery and/or ash removal. In this system the material to be transported is dropped through a valve in a pressure vessel. When the vessel is filled the valve closes and air at a pressure from 30 tom 100 psig is admitted and the material leaves the vessel in the form of a “slug”. The sequence then repeats.

PAGE 16


NB12-1401 3.5.3 ELECTRICAL a) All wiring for controls, heat generating apparatus, and other appurtenances necessary for the operation of the boiler or boilers shall be installed in accordance with the provisions of national or international standards and comply with the applicable local electrical codes. b) A manually operated remote shutdown switch or circuit breaker shall be located just outside the boiler room door and marked for easy identification. Consideration should also be given to the type and location of the switch to safeguard against tampering. c) If the boiler room door is on the building exterior, the switch shall be located just inside the door. If there is more than one door to the boiler room, there shall be a switch located at each door of egress. 1) For atmospheric-gas burners, and oil burners where a fan is on a common shaft with the oil pump, the complete burner and controls should be shut off. 2) For power burners with detached auxiliaries, only the fuel input supply to the firebox need be shut off. d) Controls and Heat Generating Apparatus 1) Oil- and gas-fired and electrically heated boilers and water heaters shall be equipped with suitable primary (flame safeguard) safety controls, safety limit controls, and burners or electric elements as required by a nationally or internationally recognized standard. 2) The symbol of the certifying organization that has investigated such equipment as having complied with a nationally recognized standard shall be affixed to the equipment and shall be considered as evidence that the unit was manufactured in accordance with that standard. 3) These devices shall be installed in accordance with jurisdictional and environmental requirements, manufacturer’s recommendations, and/or industry standards, as applicable. e) Potable Water Heaters 1) A disconnecting means capable of being locked in the open position shall be installed at an accessible location at the heater so that the heater can be disconnected from all sources of potential. This disconnecting means shall be an integral part of the heater or adjacent to it. 2) a) All wiring for controls, heat generating apparatus, and other appurtenances necessary for the operation of the potable water heaters shall be installed in accordance with the provisions of national or international standards and comply with the applicable local electrical codes. b) A manually operated remote shutdown switch or circuit breaker shall be located just outside the equipment room door and marked for easy identification. Consideration should also be given to the type and location of the switch to safeguard against tampering. c) If the equipment room door is on the building exterior, the switch shall be located just inside the door. If there is more than one door to the equipment room, there shall be a switch located at each door of egress. 1) For atmospheric-gas burners, and oil burners where a fan is on a common shaft with the oil pump, the complete burner and controls should be shut off. 2) For power burners with detached auxiliaries, only the fuel input supply needs be shut off.

PAGE 17


Archived Comments for Ballot: NB12-1401-MC

Mooney,Mark9/27/2013 1:56:00 PM

Revised my vote after speaking with Gary Schribner

Edwards,Paul9/27/2013 10:22:31 AM

No comments

Webb,Michael9/26/2013 6:05:48 PM

I have no real issue with the information presented. I do think that "of egress" @ 3.5.3 c) and e)2-c could be stricken and would read easier... Additionally, are there more specific "national or international standards" that apply? this is specifically communicating to the electrical craft. It may be more prudent to recognize those standards that "...comply with the applicable local electrical codes".

Schulte,Bryan9/25/2013 3:15:30 PM

Approved - No additional comments

Riley,Jim9/19/2013 5:06:49 PM

I agree with Mr. Reetz' comments that the proposal to cover pwh's of all sizes is impractical. He proposed a reasonable size breakpoint for jurisdictional concern and viable application.

Bourgeois,Paul9/18/2013 2:34:34 PM

The NBIC is addressing this as CSD-1 has not looked at HLW stamp heaters and I don't believe they will in the near future. I feel if the unit is stamped HLW they should comply with with the changes regardless of size.

Snyder,Raymond9/18/2013 9:28:57 AM

I have no comments

Pillow,James9/17/2013 8:05:44 AM

JPillow 9/17/13 Text needs a little work. 3.5.3.e.1 - First sentence is incomplete. 3.5.3.e.2.c.1&2 - When should things be shut off,when servicing, when in the room? This needs to be clarified.3.5.3.e.2 - Is egress the correct word? This means at "exits". Perhaps use "entrance" and "exit". These comments apply to the existing text as well as the new.

Scribner,Gary9/16/2013 2:26:27 PMReply To: Reetz,Bob

Mr. Reetz, Thank you for your comments. CSD-1 excludes potable water heaters so this would require a scope change for them. The NBIC part 1 is the only true installation code available. The intent is to have Part 1 address all types of boilers and pressure vessels so we become a one stop, premier installation code. The types and inputs of vessels regulated by a jurisdiction are strictly up to the jurisdiction. If they do not regulate smaller boilers and water heaters then they would not be required to meet the code even if the jurisdiction adopts the NBIC.

Scribner,Gary9/16/2013 2:18:42 PMReply To: Mooney,Mark

Mr. Mooney, Thank you for your comment. The wording being utilized is consistent with the wording in CSD-1, CE-110 (a) and OSHA lockout tagout requirements. Q. Why does the "disconnecting means capable of being locked in the open position?" A. Means the device can be locked with an OSHA approved device to make sure power cannot be accidently restored while the heater is being serviced. Q. have to be "installed at an accessible location at the heater" and "shall be an integral part of the heater or adjacent to it"? A. It can be on the vessel or in the vicinity of the vessel so that a service person would be able to locate the lockoutdevice. Q. What is wrong with the means to lock it out at the breaker with a switch at the device? A. True they do make tabs for breakers that allow you to lock out a breaker. This type of device is allowed with the current wording. We have not restricted this to any specific type of device.

1 2

Voting:

Name Email Votes Vote Date

Benjamin Anthony [email protected] Not Voted N/A

Bob Reetz [email protected] Not Voting 09/16/13

Bryan Schulte [email protected] Approve 09/25/13

Craig Hopkins [email protected] Not Voted N/A

Domenic canonico [email protected] Approve 09/16/13

Don Cook [email protected] Not Voted N/A

Frank Hart [email protected] Approve 09/25/13

Gary Scribner [email protected] Not Voted N/A

George Galanes PE [email protected] Approve 10/01/13

James Pillow [email protected] Disapprove 09/17/13

Jim Riley [email protected] Not Voting 09/19/13

Jim Sekely [email protected] Approve 09/20/13

Lawrence McManamon [email protected] Not Voting 09/17/13

Mark Mooney [email protected] Approve 09/27/13

Michael Richards [email protected] Approve 09/25/13

Michael Webb [email protected] Not Voting 09/26/13

Paul Bourgeois [email protected] Approve 09/18/13

Paul Edwards [email protected] Approve 09/27/13

Ralph Pate [email protected] Approve 09/25/13


PAGE 18

Robert Wielgoszinski [email protected] Not Voted N/A

Robin Hough [email protected] Not Voted N/A

Ronald Pulliam [email protected] Not Voting 09/16/13

Stanley Staniszewski [email protected] Not Voted N/A

About Us | Get Directions | Contact Us | Disclaimer | Logo & Marks Policy | Privacy Statement | Terms of Use | Site Map

Copyright 2014 The National Board of Boiler and Pressure Vessel Inspectors | 1055 Crupper Avenue Columbus, OH 43229 Ph.614.888.8320


PAGE 19

Back to Archived Ballots

Archived Comments for Ballot: NB12-1401-MC

Pulliam,Ronald9/16/2013 1:57:39 PM

I would like to see the comments posted to date addressed before I vote. Mr. Mooney and Mr. Reetz raise points that i would like to have explained further. Thank you.

Reetz,Bob 9/16/2013 1:29:07 PM

As far as I know, CSD-1 does not apply to potable water heaters. I would rather have NBIC take up this additional requirement only after CSD-1 has considered this issue. I could approve this for very large potable water heaters but not for all storage water heaters and small hot water supply boilers. How about only requiring this for potable water heaters above 400,000 Btu input?

Mooney,Mark9/16/2013 7:07:08 AM

Why does the "disconnecting means capable of being locked in the open position" have to be "installed at an accessible location at the heater" and "shall be an integral part of the heater or adjacent to it"? What is wrong with the means to lock it out at the breakerwith a switch at the device?

1 2

Voting:

Name Email Votes Vote Date

Benjamin Anthony [email protected] Not Voted N/A

Bob Reetz [email protected] Not Voting 09/16/13

Bryan Schulte [email protected] Approve 09/25/13

Craig Hopkins [email protected] Not Voted N/A

Domenic canonico [email protected] Approve 09/16/13

Don Cook [email protected] Not Voted N/A

Frank Hart [email protected] Approve 09/25/13

Gary Scribner [email protected] Not Voted N/A

George Galanes PE [email protected] Approve 10/01/13

James Pillow [email protected] Disapprove 09/17/13

Jim Riley [email protected] Not Voting 09/19/13

Jim Sekely [email protected] Approve 09/20/13

Lawrence McManamon [email protected] Not Voting 09/17/13

Mark Mooney [email protected] Approve 09/27/13

Michael Richards [email protected] Approve 09/25/13

Michael Webb [email protected] Not Voting 09/26/13

Paul Bourgeois [email protected] Approve 09/18/13

Paul Edwards [email protected] Approve 09/27/13

Ralph Pate [email protected] Approve 09/25/13

Robert Wielgoszinski [email protected] Not Voted N/A

Robin Hough [email protected] Not Voted N/A

Ronald Pulliam [email protected] Not Voting 09/16/13

Stanley Staniszewski [email protected] Not Voted N/A


PAGE 20

Outline of Proposed Installation Requirements for Condensing Boilers

Rational Define the aspects of installation of Condensing Boilers which are unique from other products covered by this section.

The following listing is offered as points for discussion in the development of an addition to Part 1 (Installation) of the NBIC:

o CO monitor/alarm should be a requirement for boiler room

Condensate drain system o Routing o Termination point (preferably away from occupied areas) o Trap height v vent system ∆P - Use of condensate pumps

Material selection for stack (vent) and piping o Pitch/ Drainage of condensate o Corrosion resistance o Temperature capability o Termination relative to air intake systems, snowlines, etc. o Sizing, routing and pressure drop

Sealed combustion systems o Outside air intake location relative to vent products, snowlines, etc. o Routing and sizing o Filtration o Burner Manufacturer requirements

Condensate pH control o Local sewer Codes

Air inlet filtration o Filter ∆P/sizing o Burner Manufacturer requirements

Glycol usage o Materials compatibility – Seals, etc. o Boiler Manufacturer recommendations – Dilution, etc o Disposal

Water treatment o Boiler Manufacturer’s recommendations

Piping systems o Boiler manufacturer’s recommendations o System designer requirements

NB13-1101

PAGE 21


Boiler flow and temperature requirements o Boiler Manufacturer’s recommendations o System designer requirements

Questions

1) Do we need two documents – one for installation plus a guideline for inspection section?

NB13-1101

PAGE 22


NB14‐0401

Action Item Request Form

8.3 CODE REVISIONS OR ADDITIONS

Request for Code revisions or additions shall provide the following:

a) Proposed Revisions or Additions

For revisions, identify the rules of the Code that require revision and submit a copy of the appropriate

rules as they appear in the Code, marked up with the proposed revision. For additions, provide the

recommended wording referenced to the existing Code rules.

Existing Text:

Part1 Installation does not address lockable disconnects for power, heating and hot water supply boilers.

2.5.3 ELECTRICAL

a) A disconnecting means capable of being locked in the open position shall be installed at an accessible location at the boiler so that the boiler can be disconnected from all sources of potential. This disconnecting means shall be an integral part of the boiler or adjacent to it.

3.5.3 ELECTRICAL

a) All wiring for controls, heat generating apparatus, and other appurtenances necessary for the operation of the boiler or boilers shall be installed in accordance with the provisions of national or international standards and comply with the applicable local electrical codes.

b) A manually operated remote shutdown switch or circuit breaker shall be located just outside the boiler room door and marked for easy identification. Consideration should also be given to the type and location of the switch to safeguard against tampering.

c) A disconnecting means capable of being locked in the open position shall be installed at an accessible location at the boiler so that the boiler can be disconnected from all sources of potential. This disconnecting means shall be an integral part of the boiler or adjacent to it.

d) If the boiler room door is on the building exterior, the switch shall be located just inside the door. If there is more than one door to the boiler room, there shall be a switch located at each door of egress.

1) For atmospheric-gas burners, and oil burners where a fan is on a common shaft with the oil pump, the complete burner and controls should be shut off.

2) For power burners with detached auxiliaries, only the fuel input supply to the firebox need be shut off.

e) Controls and Heat Generating Apparatus

1) Oil- and gas-fired and electrically heated boilers and water heaters shall be equipped with suitable primary (flame safeguard) safety controls, safety limit controls, and burners or electric elements as required by a nationally or internationally recognized standard.

2) The symbol of the certifying organization that has investigated such equipment as having complied with a nationally recognized standard shall be affixed to the equipment and shall be considered as evidence that the unit was manufactured in accordance with that standard.

3) These devices shall be installed in accordance with jurisdictional and environmental requirements, manufacturer’s recommendations, and/or industry standards, as applicable.

PAGE 23


NB14‐0401

b) Statement of Need

Provide a brief explanation of the need for the revision or addition.

c) Background Information

Provide background information to support the revision or addition, including any data or changes in

technology that form the basis for the request that will allow the Committee to adequately evaluate the

proposed revision or addition. Sketches, tables, figures, and graphs should be submitted as appropriate.

When applicable, identify any pertinent paragraph in the Code that would be affected by the revision or

addition and identify paragraphs in the Code that reference the paragraphs that are to be revised or

added.

Part 1 Installation does not require lockable disconnects. Wording needs to be added to become more

uniform with other codes and standards

Other codes and standard require lockable disconnects on power, heating and hot water supply boilers thus

changes need to be made to Part 1 Installation to address the disconnects. See the first section above.

PAGE 24


Definition of the term Equipment for Part 1 Installation where applicable.

Suggestion:

Equipment Room – means a room or space within a building for the installation of mechanical or

electrical/electronic devices. It includes but is not limited to equipment such as boilers used in their

applications. In some cases, this room is also called a boiler or machinery room.

NB14-0402 Definition of Equipment Room

PAGE 25


2013 NATIONAL BOARD INSPECTION CODE

2 PART 1 — INSTALLATION

Part 1 — InstallatIon table of Contents

National Board Contact Information ....................................................................................................... II

NB Board of Trustees / Advisory Committee Members........................................................................... III

National Board Members ..................................................................................................................... IV

NBIC Committee Structure .................................................................................................................... V

National Board Inspection Code Edition / Addendum ............................................................................ XI

Foreword ............................................................................................................................................ XII

Introduction ........................................................................................................................................ XIV

Section 1 General Guidelines ......................................................................................................... 7 1.1 Introduction ............................................................................................... 8 1.2 Purpose ..................................................................................................... 8 1.3 Application of these Rules ............................................................................ 8

1.4 Certification, Inspection, and Jurisdictional Requirements ............................................... 9 1.4.1 Responsibility .................................................................................................................... 9

1.4.2 Equipment Certification ................................................................................ 9 1.4.3 Jurisdictional Review .................................................................................... 9 1.4.4 Inspection ................................................................................................... 10 1.4.5 Boiler Installation Report ............................................................................... 10

1.4.5.1 Boiler Installation Report I-1 .......................................................................................... 11 1.4.5.1.1 Guide for Completing National Board Boiler Installation Report ........................................ 12

Section 2 Power Boilers ................................................................................................................ 15 2.1 Scope ............................................................................................................................ 16

2.2 Definitions ............................................................................................... 16 2.3 General Requirements ............................................................................ 16

2.3.1 Supports, Foundations, and Settings ........................................................... 16 2.3.2 Structural Steel ........................................................................................... 16 2.3.3 Clearances ................................................................................................... 16

2.4 Boiler RoomEquipment room Requirements............................................ 17 2.4.1 Exit ............................................................................................................. 17 2.4.2 Ladders and Runways .................................................................................. 17 2.4.3 Drains ........................................................................................................... 18 2.4.4 Water (Cleaning) ......................................................................................... 18

2.5 Source Requirements .............................................................................. 18 2.5.1 Feedwater .................................................................................................. 18

2.5.1.1 Volume ................................................................................................................. 18 2.5.1.2 Connection ...................................................................................................... 18 2.5.1.3 Pumps ........................................................................................................... 19 2.5.1.4 Valves ...................................................................................................................... 19

2.5.2 Fuel ............................................................................................................ 20 2.5.3 Electrical ..................................................................................................... 20

2.5.3.1 Wiring ............................................................................................................ 20 2.5.3.2 Remote Emergency Shutdown Switches ....................................................... 20 2.5.3.3 Controls and Heat-Generating Apparatus ....................................................... 21

2.5.4 Ventilation and Combustion Air .................................................................... 21 2.5.5 Lighting ......................................................................................................... 21 2.5.6 Emergency Valves and Controls ................................................................... 22

2.6 Discharge Requirements ......................................................................... 22

PAGE 26


NATIONAL BOARD INSPECTION CODE 2013

PART 1 — INSTALLATION 3

2.6.1 Chimney or Stack ........................................................................................ 22 2.6.2 Ash Removal ................................................................................................ 22 2.6.3 Drains ........................................................................................................... 22

2.6.3.1 Connection ...................................................................................................... 22 2.6.3.2 Pressure Rating ............................................................................................... 22 2.6.3.3 Parts .............................................................................................................. 23

2.7 Operating Systems .................................................................................. 23 2.7.1 Breeching and Dampers ............................................................................... 23 2.7.2 Burners and Stokers ................................................................................... 23 2.7.3 Steam Supply ............................................................................................. 23 2.7.4 Condensate and Return ................................................................................ 24 2.7.5 Blowoff .......................................................................................................... 24

2.8 Controls and Gages ................................................................................. 26 2.8.1 Water ................................................................................................................. 26 2.8.2 Pressure Gage ........................................................................................... 27

2.8.2.1 Connection ...................................................................................................... 27 2.8.3 Temperature ...................................................................................................... 27

2.9 Pressure Relief Valves ..................................................................................... 27 2.9.1 Valve Requirements — General .................................................................. 27

2.9.1.1 Number ............................................................................................................ 28 2.9.1.2 Location ........................................................................................................... 28 2.9.1.3 Capacity ........................................................................................................... 28 2.9.1.4 Set Pressure .................................................................................................. 30

2.9.2 Forced-Flow Steam Generator ................................................................... 30 2.9.3 Superheaters .............................................................................................. 31 2.9.4 Economizers .............................................................................................. 31 2.9.5 Pressure-Reducing Valves ................................................................................ 31

2.9.6 Mounting and Discharge Requirements ........................................................................ 32 2.10 Testing and Acceptance ............................................................................. 33

2.10.1 General ........................................................................................................ 33 2.10.2 Pressure Test ................................................................................................................. 33 2.10.3 Nondestructive Examination ......................................................................... 33 2.10.4 System Testing ...................................................................................................... 34 2.10.5 Final Acceptance .......................................................................................... 34 2.10.6 Boiler Installation Report................................................................................. 34

2.11 Tables and Figures ..................................................................................... 34

Section 3 Steam Heating Boilers, Hot-Water Heating Boilers, Hot-Water Supply Boilers, and Potable Water Heaters ................................................................................. 35

3.1 Scope ............................................................................................................................ 36 3.2 Definitions ............................................................................................... 36 3.3 General Requirements ............................................................................ 36

3.3.1 Supports ..................................................................................................... 36 3.3.1.1 Methods of Support for Steam Heating, Hot-Water Heating,

and Hot-Water Supply Boilers ........................................................................................ 36 3.3.2 Settings ...................................................................................................... 38 3.3.3 Structural Steel ........................................................................................... 38 3.3.4 Clearances ................................................................................................... 38

3.4 Boiler RoomEquipment room Requirements............................................ 39 3.4.1 Exit ............................................................................................................. 39 3.4.2 Ladders and Runways .................................................................................. 39

3.5 Source Requirements .............................................................................. 40 3.5.1 Water ................................................................................................................. 40 3.5.2 Fuel ............................................................................................................ 40 3.5.3 Electrical ..................................................................................................... 40 3.5.4 Ventilation and Combustion Air .................................................................... 41 3.5.5 Lighting ......................................................................................................... 41 3.5.6 Emergency Valves and Controls ................................................................... 41

PAGE 27



SE

CT

ION

2

c) Boilers with a top-opening manhole shall have at least 84 in. (2135 mm) of unobstructed clearance above the manhole to the ceiling of the boiler roomequipment room.

d) Boilers without top-opening manholes shall have at least 36 in. (915 mm) of clearance from the top of the

boiler or as recommended by the manufacturer.

e) Boilers with a bottom opening used for inspection or maintenance shall have at least 12 in. (305 mm) of unobstructed clearance.

2.4 boIler roomequipment room requIrements

2.4.1 exIt

Two means of exit shall be provided for boiler roomequipment rooms exceeding 500 sq. ft. (46.5 sq. m) floor area and containing one or more boilers having a combined fuel capacity of 1,000,000 Btu/hr (293 kW) or more. Each elevation shall be provided with at least two means of exit, each to be remotely located from the other. A platform at the top of a single boiler is not considered an elevation.

2.4.2 ladders and runways

a) All walkways, runways, and platforms shall be:

1) of metal construction;

2) provided between or over the top of boilers that are more than 8 ft. (2.4 m) above the operating floor

to afford accessibility for normal operation, maintenance, and inspection;

3) constructed of safety treads, standard grating, or similar material and have a minimum width of 30 in. (760 mm);

4) of bolted, welded, or riveted construction;

5) equipped with handrails 42 in. (1070 mm) high with an intermediate rail and 4 in. (100 mm) toe-board.

b) Stairways that serve as a means of access to walkways, runways, or platforms shall not exceed an angle

of 45 degrees from the horizontal and shall be equipped with handrails 42 in. (1070 mm) high with an intermediate rail.

c) Ladders that serve as a means of access to walkways, runways, or platforms shall:

1) be of metal construction and not less than 18 in. (460 mm) wide;

2) have rungs that extend through the side members and are permanently secured;

3) have a clearance of not less than 30 in. (760 mm) from the front of rungs to the nearest permanent

object on the climbing side of the ladder;

4) have a clearance of not less than 6-1/2 in. (165 mm) from the back of rungs to the nearest permanent object;

PART 1 — INSTALLATION SECTION 2 17PAGE 28



SE

CT

ION

2

5) have a clearance width of at least 15 in. (380 mm) from the center of the ladder on either side across the front of the ladder.

d) There shall be at least two permanently installed means of exit from walkways, runways, or platforms that

exceed 6 ft. (1.8 m) in length.

2.4.3 draIns

At least one floor drain shall be installed in the boiler roomequipment room.

2.4.4 water (CleanIng)

A convenient water supply shall be provided for flushing out the boiler and its appurtenances, adding water to the boiler while it is not under pressure, and cleaning the boiler roomequipment room floor.

2.5 sourCe requIrements

2.5.1 feedwater

2.5.1.1 volume

The source of feedwater shall be capable of supplying a sufficient volume of water as determined by the boiler manufacturer in order to prevent damage to the boiler when all the safety relief valves are discharging at full capacity.

2.5.1.2 ConneCtIon

a) To prevent thermal shock, feedwater shall be introduced into a boiler in such a manner that the water will

not be discharged directly against surfaces exposed to high temperature gases or to direct radiation from the flame.

b) For boiler operating pressures of 400 psig (2.8 MPa) or higher, the feedwater inlet through the drum shall

be fitted with shields, sleeves, or other suitable means to reduce the effects of temperature differentials in the shell or head.

c) Feedwater other than condensate return shall not be introduced through the blowoff.

d) Boilers having more than 500 sq. ft. (46.5 sq. m) of water heating surface shall have at least two means of

supplying feedwater. For boilers that are fired with solid fuel not in suspension, and boilers whose setting or heat source can continue to supply sufficient heat to cause damage to the boiler if the feedwater supply is interrupted, one such means of supplying feedwater shall not be subject to the same interruption as the first method. Boilers fired by gaseous, liquid, or solid fuel in suspension may be equipped with a single means of supplying feedwater, provided means are furnished for the immediate removal of heat input if the supply of feedwater is interrupted.

18 SECTION 2 PART 1 — INSTALLATION PAGE 29



SE

CT

ION

2

d) On single boiler-turbine unit installations, the boiler feedwater stop valve may be located upstream from the boiler feedwater check valve.

e) If a boiler is equipped with duplicate feedwater supply arrangements, each such arrangement shall be

equipped as required by these rules.

f) A check valve shall not be a substitute for a stop valve.

g) A combination feedwater stop-and-check valve in which there is only one seat and disk and a valve stem is provided to close the valve when the stem is screwed down shall be considered only as a stop valve, a separate check valve shall be installed.

h) Whenever globe valves are used on feedwater piping, the inlet shall be under the disk of the valve.

i) Stop valves and check valves shall be placed on the inlet of economizers or feedwater-heating devices.

j) The recirculating return line for a high-temperature water boiler shall be provided with the stop valve, or

valves, required for the main discharge outlet on the boiler.

2.5.2 fuel

Fuel systems, whether firing coal, oil, gas, or other substance, shall be installed in accordance with jurisdictional and environmental requirements, manufacturer’s recommendations, and/or industry standards, as applicable.

2.5.3 eleCtrICal

2.5.3.1 wIrIng

All wiring for controls, heat generating apparatus, and other appurtenances necessary for the operation of the boiler or boilers should be installed in accordance with the provisions of national or international standards and comply with the applicable local electrical codes.

2.5.3.2 remote emergenCy shutdown swItChes

a) A manually operated remote shutdown switch or circuit breaker shall be located just outside the boiler roomequipment room door and marked for easy identification. Consideration should also be given to the type and location of the switch in order to safeguard against tampering.

b) For boiler roomequipment rooms exceeding 500 sq. ft. (46.5 sq. m) floor area or containing one or

more boilers having a combined fuel capacity of 1,000,000 Btu/hr (293kW) or more, additional manually operated remote emergency shutdown switches shall be located at suitably identified points of egress acceptable to the Jurisdiction.

c) Where a boiler is located indoors in a facility and not in a boiler roomequipment room, a remote

emergency shutdown switch shall be located within 50 feet of the boiler along the primary egress route from the boiler area.

d) Consideration should be given to the type and location of the remote emergency shutdown switch(es) in

order to safeguard against tampering. Where approved by the Jurisdiction, alternate locations of remote emergency switch(es) may be provided.

PAGE 30



20 SECTION 2 PART 1 — INSTALLATION

PAGE 31



SE

CT

ION

2

e) For atmospheric-gas burners and for oil burners where a fan is on the common shaft with the oil pump, the emergency remote shutdown switch(es) or circuit breaker(s) must disconnect all power to the burner controls.

f) For power burners with detached auxiliaries, the emergency remote shutdown switch(es) or circuit breaker(s)

need only shut off the fuel input to the burner.

2.5.3.3 Controls and heat-generatIng aPParatus

a) Oil and gas-fired and electrically heated boilers shall be equipped with suitable primary (flame safeguard)

safety controls, safety limit switches and controls, and burners or electric elements as required by a nationally or internationally recognized standard.

b) The symbol of the certifying organization that has investigated such equipment as having complied with

a nationally recognized standard shall be affixed to the equipment and shall be considered as evidence that the unit was manufactured in accordance with that standard.

c) These devices shall be installed in accordance with jurisdictional and environmental requirements, manu-

facturer’s recommendations, and/or industry standards, as applicable.

2.5.4 ventIlatIon and CombustIon aIr

a) The boiler roomequipment room shall have an adequate air supply to permit clean, safe combustion,

minimize soot forma- tion, and maintain a minimum of 19.5% oxygen in the air of the boiler roomequipment room. The combustion and ventilation air should be supplied by either an unobstructed air opening or by power ventilation or fans.1

b) Unobstructed air openings shall be sized on the basis of 1 sq. in. (650 sq. mm) free area per 2000 Btu/ hr (586 W) maximum fuel input of the combined burners located in the boiler roomequipment room, or as specified in the National Fire Protection Association (NFPA) standards for oil and gas burning installations for the particular job conditions. The boiler roomequipment room air supply openings shall be kept clear at all times.

c) Power ventilators or fans shall be sized on the basis of 0.2 cfm (0.0057 cu meters per minute) for each

1000 Btu/hr (293 W) of maximum fuel input for the combined burners of all boilers located in the boiler roomequipment room. Additional capacity may be required for any other fuel-burning equipment in the boiler roomequipment room.

d) When power ventilators or fans are used to supply combustion air, they shall be installed with interlock

devices so that the burners will not operate without an adequate number of ventilators/fans in operation.

e) The size of openings specified in NBIC Part 1, 2.5.4 b) may be reduced when special engineered air supply systems approved by the Jurisdiction are used.

f) Care should be taken to ensure that steam and water lines are not routed across combustion air openings,

where freezing may occur in cold climates.

2.5.5 lIghtIng

The boiler roomequipment room should be well lighted and it should have an emergency light source for use in case of power failure.

1 Fans – When combustion air is supplied to the boiler by an independent duct, with or without the employment of power ventilators or fans, the duct shall be sized and installed in accordance with the manufacturer’s recommendations. However, ventilation for the boiler PAGE 32



roomequipment room must still be considered.

PART 1 — INSTALLATION SECTION 2 21

PAGE 33



SE

CT

ION

3

b) Modular heating boilers that require individual units to be set side by side, front to back, or by stacking shall provide clearances in accordance with the manufacturer’s recommendations, subject to acceptance by the Jurisdiction.

c) Heating boilers shall be located so that adequate space is provided for proper operation, maintenance,3

and inspection of equipment and appurtenances.

3.4 boIler roomequipment room requIrements

3.4.1 exIt

Two means of exit shall be provided for boiler roomequipment rooms exceeding 500 sq. ft. (46.5 sq. m) of floor area and containing one or more boilers having a combined fuel capacity of 1,000,000 Btu/hr (293 kW) or more (or equivalent electrical heat input). Each elevation shall be provided with at least two means of exit, each to be remotely located from the other. A platform at the top of a single boiler is not considered an elevation.

3.4.2 ladders and runways

a) All walkways, runways, and platforms shall be:

1) of metal construction;

2) provided between or over the top of boilers that are more than 8 ft. (2.4 m) above the operating floor

to afford accessibility for normal operation, maintenance, and inspection;

3) constructed of safety treads, standard grating, or similar material and have a minimum width of 30 in. (760 mm);

4) of bolted, welded, or riveted construction; and

5) equipped with handrails 42 in. (1070 mm) high with an intermediate rail and 4 in. (100 mm) toe board.

b) Stairways that serve as a means of access to walkways, runways, or platforms shall not exceed an angle

of 45 degrees from the horizontal and be equipped with handrails 42 in. (1070 mm) high with an intermediate rail.

c) Ladders that serve as a means of access to walkways, runways, or platforms shall:

1) be of metal construction and not less than 18 in. (460 mm) wide;

2) have rungs that extend through the side members and are permanently secured;

3) have a clearance of not less than 30 in. (760 mm) from the front of rungs to the nearest permanent

object on the climbing side of the ladder;

4) have a clearance of not less than 6-1/2 in. (165 mm) from the back of rungs to the nearest permanent object; and

3 Maintenance – This includes the removal of tubes.

PAGE 34




PAGE 35



SE

CT

ION

3

5) have a clearance width of at least 15 in. (380 mm) from the center of the ladder on either side across the front of the ladder.

d) There shall be at least two permanently installed means of exit from walkways, runways, or platforms that

exceed 6 ft. (1.8 m) in length.

3.5 sourCe requIrements

3.5.1 water

a) A means to add water to or fill the boiler, while not under pressure, shall be provided. A valve or threaded

plug may be used to shut off the fill connection when the boiler is in service.

b) Water fill connections shall be installed. A means shall be provided at or near the boiler to prevent back- feeding. Such means shall be rated for the boiler design pressure and temperature.

c) Provision should also be made in every boiler roomequipment room for a convenient water supply that can be used to

flush out the boiler and to clean the boiler roomequipment room floor.

3.5.2 fuel

Fuel systems, whether firing coal, oil, gas, or other substance, shall be installed in accordance with jurisdictional and environmental requirements, manufacturer’s recommendations, and/or industry standards, as applicable.

3.5.3 eleCtrICal

a) All wiring for controls, heat generating apparatus, and other appurtenances necessary for the operation

of the boiler or boilers shall be installed in accordance with the provisions of national or international standards and comply with the applicable local electrical codes.

b) A manually operated remote shutdown switch or circuit breaker shall be located just outside the boiler

roomequipment room door and marked for easy identification. Consideration should also be given to the type and location of the switch to safeguard against tampering.

c) If the boiler roomequipment room door is on the building exterior, the switch shall be located just inside

the door. If there is more than one door to the boiler roomequipment room, there shall be a switch located at each door of egress.

1) For atmospheric-gas burners, and oil burners where a fan is on a common shaft with the oil pump,

the complete burner and controls should be shut off.

2) For power burners with detached auxiliaries, only the fuel input supply to the firebox need be shut off.

d) Controls and Heat Generating Apparatus

1) Oil- and gas-fired and electrically heated boilers and water heaters shall be equipped with suitable primary (flame safeguard) safety controls, safety limit controls, and burners or electric elements as required by a nationally or internationally recognized standard.

PAGE 36




PAGE 37



SE

CT

ION

3

2) The symbol of the certifying organization that has investigated such equipment as having complied with a nationally recognized standard shall be affixed to the equipment and shall be considered as evidence that the unit was manufactured in accordance with that standard.

3) These devices shall be installed in accordance with jurisdictional and environmental requirements,

manufacturer’s recommendations, and/or industry standards, as applicable.

3.5.4 ventIlatIon and CombustIon aIr

a) The boiler roomequipment room shall have an adequate air supply to permit clean, safe combustion,

minimize soot forma- tion, and maintain a minimum of 19.5% oxygen in the air of the boiler roomequipment room. The combustion and ventilation air may be supplied by either an unobstructed air opening or by power ventilation or fans.4

b) Unobstructed air openings shall be sized on the basis of 1 sq. in. (645 sq mm) free area per 2000 Btu/

hr (586 W) maximum fuel input of the combined burners located in the boiler roomequipment room, or as specified in the National Fire Protection Association (NFPA) standards for oil and gas burning installations for the particular job conditions. The boiler roomequipment room air supply openings shall be kept clear at all times.

c) Power ventilators or fans shall be sized on the basis of 0.2 cfm (.0057 cu meters per minute) for each

1,000 Btu/hr (293 W) of maximum fuel input for the combined burners of all boilers and/or water heaters located in the boiler roomequipment room. Additional capacity may be required for any other fuel burning equipment in the boiler roomequipment room.

d) When power ventilators or fans are used to supply combustion air, they shall be installed with interlock devices so that the burners will not operate without an adequate number of ventilators/fans in operation.

e) When combustion air is supplied to the heating boiler by an independent duct, with or without the employ-

ment of power ventilators or fans, the duct shall be sized and installed in accordance with the manufacturer’s recommendations. However, ventilation for the boiler roomequipment room must still be considered.

f) The size of openings specified in NBIC Part 1, 3.5.4 b) may be reduced when special engineered air supply systems approved by the Jurisdiction are used.

g) Care should be taken to ensure that steam and water lines are not routed across combustion air openings,

where freezing may occur in cold climates.

3.5.5 lIghtIng

The boiler roomequipment room should be well lighted, and it should have an emergency light source for use in case of power failure.

3.5.6 emergenCy valves and Controls

All emergency shut-off valves and controls shall be accessible from a floor, platform, walkway or runway. Ac- cessibility shall mean within a 6 ft. (1.8 m) elevation of the standing space and not more than 12 in. (305 mm) horizontally from the standing space edge.

4 Fans – When combustion air is supplied to the boiler by an independent duct, with or without the employment of power ventilators or fans, the duct shall be sized and installed in accordance with the manufacturer’s recommendations. However, ventilation for the boiler roomequipment room must still be considered.

PAGE 38




PAGE 39



SE

CT

ION

3

3.6 dIsCharge requIrements

3.6.1 ChImney or staCk

Chimneys or stacks shall be installed in accordance with jurisdictional and environmental requirements, manufacturer’s recommendations, and/or industry standards, as applicable.

3.6.2 ash removal

Ash removal systems shall be installed in accordance with jurisdictional and environmental requirements, manufacturer’s recommendations, and/or industry standards, as applicable.

3.6.3 draIns

Unobstructed floor drains, properly located in the boiler roomequipment room, will facilitate proper cleaning of the boiler roomequipment room. Floor drains that are used infrequently should have water poured into them periodically to prevent the entrance of sewer gasses and odors. If there is a possibility of freezing, an environmentally safe antifreeze mixture should be used in the drain traps. Drains receiving blowdown water should be connected to the sanitary sewer by way of an acceptable blowdown tank or separator or an air gap that will allow the blowdown water to cool to at least 140°F (60°C) and reduce the pressure to 5 psig (34 kPa) or less.

3.7 oPeratIng systems

3.7.1 oIl heaters

a) A heater for oil or other liquid harmful to boiler operation shall not be installed directly in the steam or water

space within a boiler.

b) Where an external-type heater for such service is used, means shall be provided to prevent the introduction into the boiler of oil or other liquid harmful to boiler operation.

3.7.2 breeChIng and damPers

Breeching and dampers shall be installed in accordance with jurisdictional and environmental requirements, manufacturer’s recommendations, and/or industry standards, as applicable.

3.7.3 burners and stokers

Burners and stokers shall be installed in accordance with jurisdictional and environmental requirements, manufacturer’s recommendations, and/or industry standards, as applicable.

PAGE 40




PAGE 41



SE

CT

ION

11

b boilers — Part 2 (2.2), (2.5.5.1)

watertube — Part 2 (2.2.12.1) black liquor — Part 2 - (2.2.12.2) organic and Inorganic fluid — Part 2 (2.2.12.3) waste heat — Part 2 (2.2.12.4) Cast Iron — Part 2 (2.2.12.5) electric — Part 2 (2.2.12.6) fired-storage water heaters — Part 2 (2.2.12.8) firetube — Part 2 (2.2.12.9) historical/hobby — Part 2 (Supplement 2) modular — Part 1 (3.7.8) locomotive — Part 2 (Supplement 1)

boiler Inspection guideline (historical) — Part 2 (S2.11)

boiler Installation,

Power boilers — Part 1 (Section 2) steam heating — Part 1 (Section 3) heating/Potable water heaters — Part 1 (Section 3) report — Part 1 (1.4.5), (2.10.6), (3.10.3)

boiler operators (historical) — Part 2 (S2.11)

boiler repair — Part 3 (3.3.4.2), (3.3.4.3), (Supplement 1),

(Supplement 2)

boiler relief devices — Part 2 (2.5.5.1)

boiler roomequipment room requirements — Part 1 (2.4), (3.4)

bonding — Part 3 (S4.10)

blowoff — Part 1 (2.7.5), (3.7.7); Part 2 (2.2.6)

braces — Part 3 (S1.2.6); Part 2 (S1.4.2)

brittle fracture — Part 2 (5.3.8.2)

bulges and blisters — Part 2 (3.4.7), (5.3.8.3), (S7.8.3);

Part 3 (3.3.4.2)

burners and stokers — Part 1 (2.7.2), (3.7.3)

C Calculations — Part 1 (7.3); Part 2 (S2.10.1), (S2.6.2), (7.3);

Part 3 (3.2.4), (3.2.5), (3.3.3), (3.3.4.3), (3.4.1), (3.4.2), (S1.1.4), (S4.6), (S4.16.3), (S4.17.4), (S4.17.5), (S4.18.2.3)

Capacity — Part 1 (2.9.1.3), (5.3.4); Part 2 (2.3.6.2),

(2.5.2), (2.5.4), (2.5.5.3), (2.5.7), (S2.8.1), (S2.11), (S5.3.1), (S5.9.3), (S6.8), (S6.13.9), (S6.13.11.3), (S6.13.11.4), (S6.15.1), (S6.15.4)

Cargo tanks — Part 2 (Supplement 6)

Capacity Certification — Part 1, Part 2 and Part 3 (5.9.3), (Section 9)

Caulking riveted seams — Part 3 (S1.2.12.1), (S2.13.13.1)

PART 1 — INSTALLATION SECTION 11 131PAGE 42


Action Item Request Form

8.3 CODE REVISIONS OR ADDITIONS

Request for Code revisions or additions shall provide the following:

a) Proposed Revisions or Additions

For revisions, identify the rules of the Code that require revision and submit a copy of the appropriate

rules as they appear in the Code, marked up with the proposed revision. For additions, provide the

recommended wording referenced to the existing Code rules.

Existing Text:

b) Statement of Need

Provide a brief explanation of the need for the revision or addition.

Part 1 – Section 2

2.7.3 Steam Supply

f) Ample provision for gravity drain shall be provided when a stop valve is so located that water or condensation may

accumulate. The gravity drain(s) shall be located such that the entire steam supply system can be drained.

2.9.6 M ounting and Discharge Requirements

h) All safety or safety relief valves shall be piped to a safe point of discharge so located or piped as to be carried clear

from running boards or platforms. Ample provision for gravity drain shall be made in the discharge pipe at or near each

safety or safety relief valve, and where water or condensation may collect. Each valve shall have an open gravity drain

through the casing below the level of the valve seat. For iron and steel‐ bodied valves exceeding NPS 2 (DN 50), the drain

hole shall be tapped not less than NPS 3/8 (DN 10).

It is the "gravity drain" that shall be ample not the "provision". This is also consistent with ASME

language in Section I and language adopted by SG Historical Boilers.

NB14-1501

PAGE 43


c) Background Information

Provide background information to support the revision or addition, including any data or changes in

technology that form the basis for the request that will allow the Committee to adequately evaluate the

proposed revision or addition. Sketches, tables, figures, and graphs should be submitted as appropriate.

When applicable, identify any pertinent paragraph in the Code that would be affected by the revision or

addition and identify paragraphs in the Code that reference the paragraphs that are to be revised or

added.

ASME Section I PG‐58.3.2 When two or more boilers are connected to a common steam header, or when a

single boiler is connected to a header having another steam source (e.g., a turbine extraction line), the

connection from each boiler having a manhole opening shall be fitted with two stop valves having an ample

free‐blow drain between them.

The proposed change will make the NBIC consistent with ASME Section I.

NB14-1501

PAGE 44


Changes suggested

Part 1 Section 2.7.3 Steam Supply f) Ample provisionProvision for an ample gravity drain shall be provided when a stopvalve is so located that water or condensation may accumulate. The gravity drain(s) shall be located such that the entire steam supply system can be drained.

2.9.6 Mounting and Discharge Requirements h) All safety or safety relief valves shall be piped to a safe point of discharge so locatedor piped as to be carried clear from running boards or platforms. Ample provisionProvision for an ample gravity drain shall be made in the discharge pipe at or near each safety or safety relief valve, and where water or condensation may collect. Each valve shall have an open gravity drain through the casing below the level of the valve seat. For iron and steel- bodied valves exceeding NPS 2 (DN 50), the drain hole shall be tapped not less than NPS 3/8 (DN 10).

NB14-1501

PAGE 45


subgroup on boilers - national board of boiler and pressure … meetings... · 2017-03-20 ·...

Documents