This standard specifies flanged, welded connections and threaded metal sealing ball valve (hereinafter referred to as "ball") the terms, structure, technical requirements, materials, assembly and commissioning, testing methods, inspection rules, marking, nameplates and supply.
    This standard applies to nominal size DN15 ~ DN600, nominal pressure PN16 ~ PN420 the ball.
Ball Valve 2 Normative references
    The terms of the following documents by the standard reference in the provisions of this standard. For dated references, subsequent to all of the amendments (excluding corrections) or revisions do not apply to this standard, however, encourage the parties to reach an agreement under this standard to explore the possibility to use the latest version of these documents . For undated reference documents, the latest versions apply to this standard.
    GB / T 70.1 Hexagon socket head screws (GB / T 70.1-2000, eqv ISO 4762:1997)
    GB / T 196 common thread of basic dimensions (GB / T 196-2003, ISO 724:1993, MOD)
    GB / T 197 common thread tolerance (GB / T 197-2003, ISO 965-1:1998, MOD)
    GB / T 228 Metallic materials Tensile testing method (GB / T 228-2002, ISO 6892:1998 (E), MOD)
    GB / T 897 stud bm = 1d
    GB / T 898 stud bm = 1.25d
    GB / T 901 Class B of equal length stud
    GB / T 4622.3 spiral wound gaskets
    GB / T 5782 Hexagon head bolts (GB / T 5782-2000, eqv ISO 4014:1999)
    GB / T 5783 Hexagon head bolts with thread (GB / T 5783-2000, eqv ISO 4017:1999)
    GB / T 6170 1 Hexagon nut (GB / T 6170-2000, eqv ISO 4032:1999)
    GB / T 6175 2-type hexagon nuts (GB / T 6175-2000, eqv ISO 4033:1999)
    GB / T 7306 55 ° sealing pipe thread (GB / T 7306-2000, eqv ISO 7-1:1994)
    GB / T 9113.1 ~ 9113.4 Integral steel pipe flanges
    GB / T 9124 steel flanges
    GB / T 9128 steel pipe flanges with metal ring pad size (GB / T 9128-2003, ISO 7483:1991, NEQ)
    GB / T 12220 Universal Valve logo (GB / T 12220-1989, idt ISO 5209:1977)
    GB / T 12221 Metal valve structure length (GB / T 12221-2005, ISO 5752:1982, MOD)
    GB / T 12224 General requirements for steel valves
    GB / T 12228 Universal Valve carbon steel forgings
    GB / T 12229 Universal Valve carbon steel castings
    GB / T 12230 Universal Valve Stainless steel castings
    GB / T 13927-1992 General Valve pressure test (neq ISO 5208:1982)
    JB / T 6899-1993 fire resistance testing valves
    JB / T 7370 flexible graphite braided packing
    JB / T 7928 General requirements valve supplier
    JB / T 9092-1999 Valve inspection and test