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API Valve Standards

  • API 5L
    Specification for Line Pipe

  • API 6D
    Pipe Line Valves, End Closures, Connectors and Swivels

  • API 6F
    Recommended Practice for Fire Test for valves

  • API STD 527
    Seat Tightness of Pressure Relief Valves R(2002)
    Describes methods of determining the seat tightness of metal and soft-seated pressure relief valves, including those of conventional bellows and pilot-operated designs

  • API 593
    Ductile Iron Plug Valves - Flanged Ends

  • API 598
    Valve Inspection and Test

  • API 600
    Steel Gate Valves

  • API 601
    Metallic Gaskets for Refinery Piping

  • API 602
    Compact Design Carbon Steel Gate Valves

  • API 604
    Ductile Iron Gate Valves
    Flanged Ends

  • API 605
    Large Diameter Carbon Steel Flanges

  • API 607
    Fire Test for Soft Seated Ball Valves

  • API 609
    Butterfly Valves

  • API 1104
    Standard for Welding Pipeline and Facilities