T/ZZB 0802-2018 Steel-made rotating check valve for use in petroleum, petrochemical, natural gas and related industries
T/ZZB 0802-2018 Steel-made rotating check valve for use in petroleum, petrochemical, natural gas and related industries
Basic Information
Scope
Main technical content: This standard specifies the terms and definitions, structural types, basic requirements, technical requirements, test methods, inspection rules, marking, supply requirements, and quality commitments for steel swing check valves used in the petroleum, petrochemical, natural gas, and related industries. This standard applies to nominal pressures of PN16 to PN400 or Class 150 to Class 2500, nominal sizes of DN50 to DN600 or NPS2 to NPS24, operating temperatures of -29°C to 538°C, bolt-connected valve covers, end connections in the form of flanges or welded ends, swing-type valve discs, and steel swing check valves (hereinafter referred to as valves) used in the petroleum, petrochemical, natural gas, and related industries. This standard also applies to steel swing check valves with pressure self-sealing valve covers.