Specification for steel globe and globe stop and check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
石油、石化和相关工业用钢制截止阀、截止阀和止回阀（法兰和对焊端）规范

1975-04-30

石油、化工及相关工业用的钢制旋启式止回阀
Steel swing check valve for petroleum, petrochemical and allied industries

2008-02-02

石油和天然气工业用钢制闸阀、截止阀和止回阀（≤DN100）
Steel gate, globe and check valve for the petroleum and natural gas industries (for sizes DN100 and smaller)

2012-11-05

Steel gate, globe and check valves for sizes DN 100 and smaller, for the petroleum and natural gas industries
钢门 球阀和止回阀尺寸Dn 100和较小的石油和天然气工业

2020-08-25

Steel gate, globe and check valves for sizes DN 100 and smaller, for the petroleum and natural gas industries
石油和天然气工业用DN 100及以下尺寸的钢制闸阀、截止阀和止回阀

2020-09-23

Specification for steel check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
石油、石化和相关工业用钢制止回阀（法兰和对焊端）规范

2010-01-31