UL 252A
Standard for Compressed Gas Regulator Accessories

DETAILS
Edition Number:4SCC Approved:--
Edition Date:2010-09-16DOD Approved: 2002-08-12
Price Code:BANSI Approved: 2015-01-16
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover accessories intended for direct connection to the low or delivery pressure side of compressed gas regulators. These devices are not intended for direct connection to high or storage cylinder pressures.

    1.2 Accessories covered by these requirements are intended for use with compressed gases such as air, carbon dioxide, inert gases, fuel gases, nitrogen, nitrous oxide and oxygen.

    1.3 The suitability of an accessory in combination with a compressed gas regulator shall be judged under the applicable requirements of the Standard for Compressed Gas Regulators, UL 252.

    1.4 These requirements do not cover:

    a)    Flow characteristics,

    b)    The physiological effects of accessories to be used with medical gases,

    c)    Accuracy of pressure gauges and flow indicators, nor

    d)    Accessories that are covered by other UL standards.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Glossary
        • CONSTRUCTION
          • 5 Assembly
          • 6 Materials
          • 7 Connections
        • PERFORMANCE
          • 8 General
          • 9 Torque Test
          • 10 External Leakage Test
          • 11 Hydrostatic Strength Test
          • 12 Excess Pressure Test
          • 13 Volume Change and Weight Loss Tests
            • 13.1 General
            • 13.2 Tests using n-Hexane and IRM 903 Oil
            • 13.3 Tests using liquid MPS
          • 14 Accelerated Aging Test for Elastomers
          • 15 Comparative Corrosion Test
            • 15.1 General
            • 15.2 Tests in the presence of salt spray (fog)
            • 15.3 Tests in the presence of moist hydrogen sulfide-air mixture
            • 15.4 Tests in the presence of moist sulfur dioxide-carbon dioxide-air mixture
          • 16 Accelerated Aging Test for Nonmetallic Tubes of Flow Meters
          • 17 Endurance Test for Valves
          • 18 Seat Leakage Test
          • 19 Start-to-Discharge and Burst Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 20 General
        • MARKINGS
          • 21 General