ul-132.7

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)     Safety 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.


1.1 revised July 30, 2009

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

1.2 revised July 30, 2009

1.3 Deleted July 30, 2009

UL 132 does not reference any other UL Standards.

Table of Contents for UL 132.