Lorri Grainawi

Steel Tank Institute

1985

1969

1992

1985

UL 58 - Standard for Steel Underground

Tanks for Flammable and Combustible

Liquids

ULC S615 - Standard for Reinforced Plastic Underground Tanks for Flammable and

Combustible Liquids

UL 1316 - Glass-Fiber-Reinforced Plastic Underground Storage Tanks for Petroleum

Products, Alcohols, and Alcohol-Gasoline

Mixtures

ULC S603 - Standard for Steel

Underground Tanks for Flammable And

Combustible Liquids

ULC S603.1 - External Corrosion Protection

Systems for Steel Underground Tanks for Flammable and Combustible Liquids

UL 1746 - Standard for External Corrosion

Protection Systems For Steel Underground Storage Tanks

UL 2085 - Standard for

Protected

Aboveground Tanks

for Flammable and

Combustible Liquids

SwRI - Southwest

Research Institute

SwRI 97-04

SwRI 93-01

API - American

Petroleum Institute

API 12F

API 650, App. J

UL 80 - Standard for

Steel Tanks for Oil-

Burner Fuel ULC ORD-C80.1 -

Non-Metallic Tanks for

Fuel Oil

UL 142 - Standard for

Steel Aboveground

Tanks for Flammable

and Combustible

Liquids

UL 2245 - Standard

for Below-Grade

Vaults for Flammable

Liquid Storage Tanks

ULC S601 - Standard

for Shop Fabricated

Steel Aboveground

Horizontal Tanks

UL 971 - Standard for Nonmetallic

Underground Piping For Flammable

Liquids

SU 971A - METALLIC UNDERGROUND FUEL

PIPE

SU means the document is an Outline of

Investigation, not a Standard

ULC S660 - Standard for Nonmetallic Underground Piping for Flammable and

Combustible Liquids

SU87A - Power-Operated Dispensing

Devices for Gasoline/Ethanol Blends with

Ethanol Content Greater Than 15 Percent

ULC ORD-C142.19 - Spill Containment

Devices for Aboveground Flammable and Combustible Liquid Storage Tanks

UL 157 - Standard for Gaskets and Seals

UL 330 - Standard for Hose and Hose Assemblies for Dispensing Flammable

Liquid

UL 525 - Standard for Flame Arresters

UL 536 - Standard for Flexible Metallic

Hose

UL 860 - Pipe Unions for Flammable and

Combustible Fluids and Fire-Protection

Service

UL 1106 - Standard for Marine Manually

Operated Shutoff Valves for Flammable

Liquids

SU 2583 - FUEL TANK ACCESSORIES

SU 2215 - OIL/WATER SEPARATORS

NLPA 631- Linings

API 1631 - Linings

Consistent

Cover all necessary requirements

Without unnecessary restrictions

Be able to test as efficiently as possible

Clear and concise

Anyone should be able to read test, understand it and duplicate the test

Fill in the blank… ________________

Prescriptive

ULC S603, Steel Underground Tanks

Performance

UL 971, Non-metallic piping

Calculation

UL 58, steel thickness

All three methods should cover

structural design, product

compatibility and safety issues

Steel head, or end plate thickness

Weld joints allowed

Fitting details

Specifies weld joint

designs

Air pressure shop

test, 3 – 5 psi

UL allows either a

calculated approach,

using formula known

as “Roark” OR

Performance test, with

limitations,

Roark is a conservative

approach. Does not

rely on backfill for

support.

Coating tests

mirrored after FRP

tank standard

Interstitial

communication is required

Mainly

performance standard, 2009

ANSI approved

Atmospheric Tank

Single wall

Double wall

Does not cover

heating coils or

compartment tanks

Mainly

performance, but

Steel fittings and

venting specified

UL 1316 ISBN 1-55989-385-0

Glass-Fiber-Reinforced Plastic Underground Storage Tanks for Petroleum Products, Alcohols, and Alcohol-Gasoline Mixtures 1996

Three tests

Water load test,

one hour

External Pressure on

buried tank

Internal pressure

12 External Pressure Test

12.1 A tank shall be tested as described in 12.2. The tank shall not implode or otherwise be damaged. 12.2 The empty tank is to be installed in a test pit using the specified anchoring system and the specified backfill procedure. The pit is then to be filled with water to such a level that the tank is submerged to its maximum specified burial depth. The tank is to remain submerged for 24 hours. While the tank is still submerged, it is to be subjected for 1 minute to a partial internal vacuum so that the internal pressure on the tank is 5.3 inches of mercury less than the external pressure imposed by the hydrostatic head. 13 Internal Pressure Test

A tank shall withstand without rupture for 1 minute to an internal pressure as specified: 10 ft dia or less, 25 psi

Greater than 10 ft, 15 psi

Immersion Testing - 180 to 270 days

Must maintain 50% of strength

Impact and Cold Exposure

16 hour conditioning

1.18 lb ball

Light and water exposure

180 to 360 hour exposure

Must maintain 80% strength

Comprehensive test

program with 27

possible tests

Interstitial

communication

Puncture & crush

resistance

Pressure & Vacuum

Permeation

Impact

Product

compatibility testing (100% ethanol & 100%

methanol

Failure to burst

Failure modes

include cracking,

splitting, bulging, collapse and

delamination

Scope currently covers vapor control,

emergency vents, normal vents, caps and

covers

Prescriptive in that it states min/max for pipe diameters

Performance to prove protection against

Rain entry

Ice Blocking

Test fluids include Biodiesel &

aggressive fuels

Scope includes

meters, hoses,

pumps, etc.

Product

compatibility testing includes

aggressive fuels

Cyclic endurance testing done for

moving parts

Test fluids vary

Only one standard

includes biodiesel

Two test with

aggressive fluids

Steel does not

require testing

Img_0211.mov

Interstitial

communication

required for three UL standards

Performance

based mixed with prescriptive

requirements with

some calculation

UL standards cover only to the

point the product leaves the

factory