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    ASTM F1793 - 97(2021)

    Standard Specification for Automatic Shut-Off Valves (Also Known as Excess Flow Valves, EFV) for Air or Nitrogen Service

    Active Standard ASTM F1793 | Developed by Subcommittee: F25.11

    Book of Standards Volume: 01.08


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    Abstract

    This specification covers self-contained automatic shutoff valves (also known as excess flow valves) for air or nitrogen service. They are intended to be installed as safety devices to quickly and automatically shut off flow under certain excess flow conditions caused by a downstream failure or casualty, such as a hose rupture. Automatic shut-off valves shall be of the following types, styles, sizes, pressure ratings, and end connections: Types I and II; Styles 1 and 2. Each automatic shut-off valve must pass the following tests: visual examination; hydrostatic shell test; seal tightness test; external leakage test; and set-point test.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers self-contained automatic shut-off valves (also known as excess flow valves) for air or nitrogen service. They are intended to be installed as safety devices to quickly and automatically shut off flow under certain excess flow conditions caused by a downstream failure or casualty, such as a hose rupture.

    1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

    1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASME Standards

    ASME B1.1 Unified Inch Screw Threads (UN, UNR, and UNJ Thread Forms)

    ASME B1.20.1

    ASME B16.11 Forged Fittings, Socket-Welding and Threaded

    ASME B16.25 Buttwelding Ends

    Military Standards and Specifications

    MIL-F-1183 Fitting, Pipe, Cast Bronze, Silver-Brazing, General Specification for

    MIL-S-901 Shock Tests, H.I. (High-Impact); Shipboard Machinery Equipment and Systems, Requirements for

    MIL-STD-167-1 Mechanical Vibrations of Shipboard Equipment (Type IEnvironmental and Type IIInternally Excited)

    MIL-STD-740-1

    ASTM Standards

    F992 Specification for Valve Label Plates


    ICS Code

    ICS Number Code 23.060.01 (Valves in general)

    UNSPSC Code

    UNSPSC Code 40141600(Valves)


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/F1793-97R21

    Citation Format

    ASTM F1793-97(2021), Standard Specification for Automatic Shut-Off Valves (Also Known as Excess Flow Valves, EFV) for Air or Nitrogen Service, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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