Customer-owned tank pre-inspection guidelines

To save time and costs, please review the following information prior to Air Products inspecting your tank.Any liquid bulk tank not installed by Air Products must pass an extensive inspection process conducted by an Air Products' technician. The inspection is done to ensure that the tank has been installed and equipped to meet all requirements associated with the storage of cryogenic or gaseous products, enabling safe delivery, storage and product use.

Our ultimate goals are safety and that all inspections pass during our technician's initial visit. Our experience tells us that the items listed on the next page are the most probable (but not only) causes why your tank system may fail our inspection. In an effort to help pass the inspection on the initial visit, please review these guidelines prior to scheduling our technician for the inspection.

Feel free to contact your Air Products sales representative if you are unsure about the status or intent of any items listed.

• The tank is not installed, anchored to the foundation and system piping is not completed

• The tank’s Maximum Allowable Working Pressure (MAWP) is =/< 150 psig

– If the tank’s MAWP is =/<150 psig, please contact us to purchase a Fill Line Closure Device (FLCD). This is a requirement before the tank can be filled to protect from overpressure scenarios.

• The tank’s fill line is > 15 feet long

– If so, please contact your Air Products sales representative for guidance.

• Tank vents are directed such that they discharge toward the driver during delivery

– Redirect vents so they will not discharge toward the driver.

• The tank does not have proper safety relief valve and rupture discs

– Must have full flow device for safety relief and not thermal relief.

– Is the device able to lift freely (not bolted or wired down)?

– The relief valve must have a set point equal to or lower than the MAWP of the tank.

– All relief discharges must be to the outdoors.

– Must have at least one rupture disc, in addition to, at least one safety relief valve.

• The tank was manufactured by Linde, Taylor Wharton or UCAR between 1964-1985 and still has the original brass tee between the stainless steel liquid fill penetration and the pressure build inlet

– Contact your sales representative and send a picture(s) of the fill line penetration and surrounding piping, if easily visible, to Air Products. Please make sure not to disturb the area around this joint, especially if the area is covered in ice, because if the joint has not been fixed, the ice could be holding it together.

• Oxygen tank is too close to flammables

– Minimum of 50’ required from flammable liquids and gas storage (see diagram).

• For oxygen deliveries, the required 8' x 12' unloading pad, made of concrete or gravel, is not present

• The site cannot be accessed by a tanker truck

• Tank pad greater than 12” above grade with no steps/railing

– Install steps and railing.

• Fill connection greater than 2’ to 3’ from grade

– Install steps and railing or re-pipe to lower fill connection.

• For tanks already in service, excessive ice and/or snow blocking relief, discharge or driver access to offloading valves

– De-ice system and/or remove snow.

Primary reasons tanks fail inspection

Figure 1: Gaseous or Liquid Oxygen Distance Requirements

0 5 10 15 20 255 3 8 17 50'

0 5 10 15 20 255 3 8 17 50'

StructuresBuildings of Wood Frame Construction

Air Intake: General

5,000 scfh or less (Consult Safety for large compressors)

Sewer - from Fill Connection Including Delivery TrailerOxy

gen

Vess

el

20'

3'

Wall Openings10'

8'

50'

Air Intake: Small Air Compressors

50'

50'

25'

5'

10'

3'

50'

75'

0 5 10 15 20 255 3 8 17 50'

75'

8.5' with firewall

25'8.5' with firewall

25' to mechanical joints15' to welded joints

25'8.5' with firewall

17' with firewall

17' with firewall

17' with firewall

25' with firewall

Rapidly-burning Combustible Solids

Underground Tank

Non-liquefied or Dissolved Gases (More than 25,000 scf)

Brush or Dry Vegetation15'

Non-flammable Cryogens

Class III B Combustible Liquids

LHY Tank

Vent or Fill Connection

Flammable and Combustible Liquid

Slow-burning Combustible Solids (i.e. coal)

Flammable Pipelines

Flammable GasNon-liquefied or Dissolved Gases (25,000 scf or less)

Above-ground Storage

Flammable Gas

50'

50'

Overhead Power Lines (Distance measured in plan view)

Miscellaneous

Parked Vehicles

Places of Public Assembly

Protective Structures/ Fire Wall

3' with firewallPublic Sidewalk

Open Flames or Welding

Buildings Other than Wood Frame Construction

Overhead Power Lines for Electric Trolly Train or Bus (Distance measured in plan view)

Property Lines which may be built upon

Oxy

gen

Vess

el

Flammables, Combustibles, and Oxidizers

distance in feet

Oxy

gen

Vess

el

10'

10'

3' with firewall

3'

5' with firewall 15'

25'8.5' with firewall

25'

5' with firewall 15'

Liquefied Gas Flammable and Combustible Liquid

(more than 1,000 gal.)

Above-ground Storage50'

(less than 1,000 gal.)

© Air Products and Chemicals, Inc., 2014 (37497) 320-14-002-US

Figure 2: Tanker Truck Access

Path of right rear tire

Path of left front tire

Path of overhang

Optimum manuvering area:Road width: 25'90o turn: 50' radius (internal) 75' radius (external)180o turn: 2x vehicle length

Air Products delivery tanker50o minimum

practical turning radius

2'- 4''

2'- 4"

90o

100' normal

8'

26'

45o

22'

45o

28'

28'

22'

50' R

68'

24'

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For more information , please contact us at:

Corporate Headquarters Air Products and Chemicals, Inc.7201 Hamilton BoulevardAllentown, PA 18195-1501T 800-654-4567T 610-706-4730F 800-272-4449F 610-706- 6980gigmrktg@airproducts.com