This standard specifies the structural forms, technical requirements, materials, test methods, inspection rules, marking, packaging, transportation, storage and supply of drain valves.
This standard is applicable to PN10 to PN320 pressure vessels for liquid medium, PN10 to PN160 pressure pipelines for gas medium, and drain valves with a nominal dimension of DN15 to DN300.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 150 Steel pressure vessels
GB/T 228 Metallic materials - Tensile testing at ambient temperature
GB/T 1239.2 Cold coiled helical springs technical specifications - Part 2: Compressions spring
GB/T 1972 Disc spring
GB/T 9113 (All parts) Integral steel pipe flanges
GB/T 9124 Specification for steel pipe flanges
GB/T 12220 General purpose industrial valves - Marking
GB/T 12224 General requirements for industrial steel valves
GB/T 12226 General purpose industrial valves - Specification of flake graphite iron castings
GB/T 12227 General purpose industrial valves - Specification of spheroidal graphite iron castings
GB/T 12228 General purpose industrial valves - Specification of carbon steel forgings
GB/T 12229 General purpose industrial valves - Specification of carbon steel castings
GB/T 12230 General purpose industrial valves - Specification of stainless steel castings
GB/T 12233 General purpose industrial valves - Casting iron globe valves and lift check valves
