Please note: All interim revisions for this edition available at time of your purchase will be included.

Safety Relief Valves for Anhydrous Ammonia and LP-Gas
UL 132
1 Scope

1.1 These requirements cover pressure and safety relief valves and hydrostatic relief valves for anhydrous ammonia and liquefied petroleum gas (LP-Gas) for use on containers built in accordance with ASME Pressure Vessel Code, Section VIII, Division 1 in nonrefrigerated systems in facilities covered by the following standards:

• a) Requirements for the Storage and Handling of Anhydrous Ammonia, (ANSI K61.1), ANSI/CGA G-2.1.
• b) Liquefied Petroleum Gas Code, NFPA 58.
• c) Utility LP-Gas Plant Code, NFPA 59.

1.2 These requirements do not apply to relief valves for use on cylinders constructed in accordance with Department of Transportation (DOT) specifications.