UL 525
Standard for Flame Arresters

DETAILS
Edition Number:8SCC Approved:--
Edition Date:2008-05-09DOD Approved: --
Price Code:BANSI Approved: 2017-10-12
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover tank vent deflagration flame arresters and in-line detonation flame arresters.

    1.2 The requirements for tank vent deflagration flame arresters cover arresters for use on vents of storage tanks for petroleum oil and gasoline. These flame arresters are intended to prevent propagation of flame into the storage tank. Combination flame arrester-vent valves are also covered.

    1.3 The requirements for in-line detonation flame arresters cover arresters for use in piping systems containing flammable vapors and gases in mixture with air. These flame arresters are unidirectional or bidirectional and are intended to prevent the transmission of detonation and deflagration.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Glossary
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Terminology
        • CONSTRUCTION
          • 6 Materials
          • 7 Casings
          • 8 Provisions for Connection and Inspection
        • PERFORMANCE
          • GENERAL
          • 9 General
          • TANK VENT DEFLAGRATION FLAME ARRESTERS
          • 10 Flow Capacity
          • 11 Endurance Burn and Continuous Flame Tests
            • 11.1 General
            • 11.2 Endurance burn test
            • 11.3 Continuous flame test
          • 12 Explosion and Flashback Tests
            • 12.1 General
            • 12.2 Explosion tests
            • 12.3 Flashback tests
          • 13 Hydrostatic Pressure Test
          • 14 Corrosion Test
          • IN-LINE DETONATION FLAME ARRESTERS
          • 15 Samples
          • 16 Flow Capacity
          • 17 Endurance Burn and Continuous Flame Tests
            • 17.1 General
            • 17.2 Continuous flame
          • 18 Detonation and Deflagration Tests
            • 18.1 General
            • 18.2 Detonation tests
            • 18.3 Deflagration tests
          • 19 Hydrostatic-Pressure Test
          • 20 Pneumatic-Leakage Test
          • 21 Corrosion Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 22 Pneumatic-Leakage Test
        • MARKING
          • 23 General
          • 24 Tank Vent Deflagration Flame Arresters
          • 25 In-Line Detonation Flame Arresters