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

DETAILS
Edition Number:8SCC Approved:--
Edition Date:2015-06-30DOD Approved: --
Price Code:BANSI Approved: 2018-01-11
Type:ulstd

  • SCOPE

    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.

    1.3 The suitability of an accessory in combination with a relief valve shall be judged under the applicable requirements of this standard and NFPA 59.


    1.3 added January 12, 2018

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Components
            • 2.2 Units of measurement
            • 2.3 Undated references
          • 3 Glossary
          • 4 Unit Assemblies
        • CONSTRUCTION
          • 5 Assembly
          • 5A Field-Installed Accessories and Assemblies In Accordance With NFPA 59
          • 6 Materials
          • 7 Bodies
          • 8 Springs
          • 9 Diaphragms
          • 10 Marked Set Pressure
        • PERFORMANCE
          • 11 General
          • 12 Deformation Test
          • 13 External Leakage Test
          • 14 Hydrostatic Strength Test
          • 15 Bending Test
          • 16 Start-To-Discharge/Resealing Pressures of Safety Valves – Test No. 1
          • 17 Flow Capacity of Safety Valves – Test No. 2
          • 18 Recheck Start-To-Discharge/Resealing Pressures of Safety Valves – Test No. 3
          • 19 Time Test of Safety Relief Valves – Test No. 4
          • 20 Start-To-Discharge/Resealing Pressures of Hydrostatic Relief Valves – Test No. 5
          • 21 Exposure to Ultraviolet Light Test
          • 22 Moist Ammonia Air Stress Cracking Test – Test No. 6A
          • 23 Volume Change/Weight Loss of Rubber Parts – Test No. 7
          • 24 LP-Gas Compatibility Tests
          • 25 Accelerated Aging of Rubber Parts– Test No. 8
          • 26 Accelerated-Aging Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 27 General
        • MARKING
          • 28 General
          • 29 Instruction manual