UL 246
Standard for Hydrants for Fire-Protection Service

DETAILS
Edition Number:8SCC Approved:--
Edition Date:2011-05-25DOD Approved: 1982-06-01
Price Code:AANSI Approved: --
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover the performance of and methods for testing hydrants intended for use in piping systems supplying water for fire-protection service.

    1.2 Hydrant types covered by this standard include:

    a)    Base valve design and

    b)    Wet barrel design.

    1.2A Traffic model hydrants of both the base valve and wet barrel design may be covered by this Standard. However, these requirements are not intended to cover the performance of and methods for testing break features of traffic model hydrants.

    1.3 Requirements for the installation and use of hydrants covered by these requirements include, among others, the Standard for the Installation of Private Fire Service Mains, NFPA 24.

    1.4 A product that contains features, characteristics, materials, or systems new or different from those in use when the standard was developed, and that involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and end-product requirements as determined by the intent of this standard.

  • 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 Metallic Materials
        • CONSTRUCTION
          • 5 Outlets
          • 6 Rated Pressure
          • 7 Tops for Base Valve Hydrants
          • 8 Barrels
          • 9 Inlets
          • 10 Main Valves for Base Valve Hydrants
          • 11 Main Valves for Wet Barrel and Base Valve Hydrants
          • 12 Clearances
          • 13 Hydrant Drip Valves (Drain Valves) for Base Valve Hydrants
          • 14 Operating Stems and Mechanisms for Base Valve Hydrants
          • 15 Fire Hose and Pumper Connections and Valves
            • 15.1 General
            • 15.2 Base valve hydrants
            • 15.3 Wet barrel hydrants
          • 16 Hydrants With Monitor Elbows
          • 17 Hose Caps
          • 18 Stuffing Boxes and Seals
          • 18A Protective Interior Coatings
        • PERFORMANCE
          • 19 Samples
          • 20 Metallic Materials
          • 21 10-Day Moist Ammonia Air Stress Cracking Test
          • 22 Nonmetallic Materials Test
            • 22.1 Plastic or other nonmetallic parts (excluding rubber and synthetic elastomers)
            • 22.2 Elastomeric parts (except gaskets)
          • 23 Operation
          • 24 Leakage
          • 25 Strength of Body
          • 26 Loss of Head
          • 27 Operating Torque
          • 28 Tests on Organic Coating Materials (Deleted)
          • 28A Tests on Protective Interior Coatings
        • MANUFACTURING AND PRODUCTION TESTS
          • 29 General
        • MARKING
          • 30 General