GB/T 37621-2019 Buried type butterfly valve

GB/T 1220-1992 Stainless steel bars GB/T 1220-2007 Stainless steel bars GB/T 3098.6-2000 Mechanical properties of fasteners—Bolts, screws and studs made of stainless-steel GB/T 3098.6-2014 Mechanical properties of fasteners—Stainless steel Bolts,screws and studs GB/T 3098.6-2023 Mechanical properties of fasteners—Stainless steel bolts,screws and studs GB 4208-1993 Degrees of protection provided by enclosure (IP code) GB/T 4208-2008 Degrees of protection provided by enclosure(IP code) GB/T 4208-2017 Degrees of protection provided by enclosure(IP code) GB/T 6739-1996 Determination of film hardness by pencil test GB/T 6739-2006 Paints and varnishes—Determination of film hardness by pencil test GB/T 6739-2022 Paints and varnishes—Determination of film hardness by pencil test GB/T 9286-1998 Paints and varnishes—Cross cut test for films GB/T 9286-2021 Paints and varnishes—Cross-cut test GB/T 10002.3-1996 Unplasticized polyvinyl chloride(PVC-U) pipes for buried drainage and sewerage systems GB/T 10002.3-2011 Valves made of unplasticized poly(vinyl chloride)(PVC-U)for water supply GB/T 12220-1989 General purpose industrial valves—Marking GB/T 12220-2015 Industrial valves—Marking GB/T 12225-1989 General purpose industrial valves—Specification of copper alloy castings GB/T 12225-2005 General purpose industrial valves—Specification of copper alloy castings GB/T 12225-2018 General purpose industrial valves—Specification of copper alloy castings GB/T 12227-1989 General purpose industrial valves—Specification of spheroidal graphite iron castings GB/T 12227-2005 General purpose industrial valves—Specification of spheroidal graphite iron castings GB/T 12230-1989 General purpose industrial valves—Specification of austenitic steel castings GB/T 12230-2005 General purpose industrial valves—Specification of stainless steel castings GB/T 12230-2023 General purpose industrial valves—Specification of stainless steel castings GB/T 13663-2000 Polyethylene pipes for water supply GB/T 13663.1-2017 Polyethylene(PE)piping systems for water supply—Part 1:General GB/T 13663.2-2005 Polyethylene(PE)pipings systems for water supply—Part 2:Fittings GB/T 13663.2-2018 Polyethylene(PE)piping systems for water supply—Part 2:Pipes GB/T 13663.3-2018 Polyethylene(PE)piping systems for water supply—Part 3:Fittings GB/T 13663.5-2018 Polyethylene (PE) piping systems for water supply—Part 5:Fitness for purpose of the system GB/T 13927-1992 Pressure testing for general purpose valves GB/T 13927-2008 Industrial valves—Pressure testing GB/T 13927-2022 Industrial valves—Pressure testing GB/T 17219-1998 Standard for safety evaluation of equipment and protective materials in drinking water system GB/T 21873-2008 Rubber seals—Joint rings for water supply,drainage and sewerage pipelines—Specification for materials GB/T 26500-2011 General technical specification for pipes and fittings lined with fluoroplastics GB/T 32808-2016 Valves—Model designation method CJ/T 511-2017 Cast iron manhole cover JB/T 7928-2014 Industrial Valve Supply Requirements JB/T 8863-2017 "JB/T 8863-2017 Blade valve static pressure life test specification" JB/T 8863-2004 JB/T 8863-2004 Butterfly valve Static pressure life test procedure JB/T 106-2024 JB/T 106-2024 - Valve labeling and painting JB/T 7928-1999 JBT 7928-1999 General valve Supply requirements JB/T 106-2004 Valves marking and paint GB/T 17219-2025 Hygienic safety evaluation of distribution equipment,protective materials and treatment materials in drinking water system GB/T 26500-2025 Structure,main size and basic parameters of steel pipes and fitting lined with plastic GB/T 12227-2025 General purpose industrial valves—Technical specification for ductile iron castings GB/T 21873-2025 Rubber seals—Joint rings for water supply,drainage and sewerage pipelines—Specification for materials