UL 668
Standard for Hose Valves for Fire-Protection Service

DETAILS
Edition Number:10SCC Approved:--
Edition Date:2004-04-28DOD Approved: --
Price Code:AANSI Approved: 2016-07-12
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover angle-pattern and straightway-pattern hose valves intended for use on standpipes, fire pumps, and hydrants supplying water for fire protection service.

    1.2 Requirements for the installation of hose valves include the Standards of the National Fire Protection Association for the Installation of Sprinkler Systems, NFPA 13; for Standpipe, Private Hydrants, and Hose Systems, NFPA 14; for Installation of Stationary Fire Pumps for Fire Protection, NFPA 20; and for Installation of Private Fire Service Mains and Their Appurtenances, NFPA 24.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
        • CONSTRUCTION
          • 5 Sizes
          • 6 Working Pressure
          • 7 Materials
          • 8 Castings
          • 9 Direction to Open
          • 10 Metallic Seat Rings
          • 11 Inlets and Attachment Means
          • 12 Outlet Nipples and Threads
          • 13 Hose Outlet Caps
          • 14 Valve Stems
          • 15 Stuffing Boxes and Seals
          • 16 Handwheels
          • 17 Angle Pattern Valves
          • 18 Straightway Pattern Valves
        • PERFORMANCE
          • 19 General
          • 20 10-Day Moist Ammonia Air Stress Cracking Test
          • 21 Elastomeric Parts Test
          • 22 Hydraulic Operation Test
          • 23 Leakage Tests
            • 23.1 General
            • 23.2 Seat leakage
            • 23.3 Body leakage
            • 23.4 Repacking test
            • 23.5 Body and stem leakage
          • 24 Strength of Body Test
          • 25 Mechanical Strength Test
            • 25.1 Internal and external valve parts
        • MANUFACTURING AND PRODUCTION TESTS
          • 26 General
        • MARKING
          • 27 General
    • APPENDIX A