UL 262
Standard for Gate Valves for Fire-Protection Service

DETAILS
Edition Number:8SCC Approved:--
Edition Date:2004-02-26DOD Approved: 1989-08-10
Price Code:CANSI Approved: --
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover gate valves intended for installation in piping systems supplying water for fire-protection service. Gate valves covered by these requirements are of the outside-screw-and-yoke type or of the nonrising stem type, the latter for installation either above or below ground.

    1.2 The gate valves covered by these requirements are intended for installation and use in accordance with the Standards for:

    a)     Low Expansion Foam , NFPA 11;

    b)     Installation of Sprinkler Systems, NFPA 13;

    c)     Installation of Standpipe and Hose Systems, NFPA 14;

    d)     Water Spray Fixed Systems for Fire Protection, NFPA 15;

    e)     Deluge Foam-Water Sprinkler and Foam-Water Spray Systems, NFPA 16;

    f)     Installation of Centrifugal Fire Pumps, NFPA 20;

    g)     Water Tanks for Private Fire Protection, NFPA 22; and

    h)     Installation of Private Fire Service Mains and Their Appurtenances, NFPA 24.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
    • UL Foreword
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
        • CONSTRUCTION
          • 5 Sizes
          • 6 Rated Pressure
          • 7 Bodies and Bonnets
          • 8 Valve Operation Feature
          • 9 Gates
          • 10 Seating Surfaces
          • 11 Stems
          • 12 Stuffing Boxes and Stem Seals
          • 13 Handwheels
          • 14 Wrench Nuts
          • 15 Indicator Post Flanges
        • PERFORMANCE
          • 16 General
          • 17 Metallic Materials Test
          • 18 10-Day Moist Ammonia Air Stress Cracking Test
          • 19 Elastomeric Parts (Except Gaskets) Test
          • 20 Tests on Organic Coating Materials for Seating Surfaces
            • 20.1 General
            • 20.2 Air oven exposure
            • 20.3 Water immersion
            • 20.4 Sodium chloride immersion
            • 20.5 Potassium biphthalate immersion
            • 20.6 Sodium carbonate immersion
            • 20.7 Impact test
          • 20A Comparative Corrosion Tests for Stems
            • 20A.1 General
            • 20A.2 Moist carbon dioxide-sulfur dioxide air mixture
            • 20A.3 Salt spray
          • 21 Resilient Seat Material Securement Test
          • 22 Resilient Seat Cycling Test
          • 23 Stuffing Box Repacking Test
          • 24 Leakage Test
          • 25 Friction Loss Test for Valves Having Reduced Waterways
          • 26 Mechanical Strength Test
          • 27 Hydrostatic Tests
        • MANUFACTURING AND PRODUCTION TESTS
          • 28 General
        • MARKING
          • 29 General