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See Chinese contents: GB/T 12235-2007 GB/T 12235-2007: Steel globe valves and lift check valve for petroleum, petrochemical and allied industries [including MODIFICATION 1]
This Standard specifies the structural types, technical requirements, materials, test methods and inspection rules, marking, packaging, storage and transportation of steel globe valves and lift check valves with bolted bonnets. This standard is applicable to the steel globe valves and lift check valves with bolted bonnets and flanged or welded ends, with a nominal pressure of PN 16~PN 420, nominal dimension of DN 15~DN 400 and service temperature of -29℃~538℃, for petroleum, petrochemical and allied industries. This standard is applicable to the straight pattern, angle or Y pattern globe valves, steel lift check valves and steel globe stop valves. Steel throttle valves may refer to this standard.
