GB/T 20801.1-2025 Pressure piping code—Part 1:Industrial piping

GB/T 20801.5-2025 Pressure piping code—Part 5:Hydrogen piping and pipelines

GB/T 20801.1-2020 Pressure piping code—Industrial piping—Part 1:General GB/T 20801.2-2020 Pressure piping code—Industrial piping—Part 2:Materials GB/T 20801.3-2020 Pressure piping code—Industrial piping—Part 3:Design and calculation GB/T 20801.4-2020 Pressure piping code—Industrial piping—Part 4:Fabrication and assembly GB/T 20801.5-2020 Pressure piping code—Industrial piping—Part 5:Inspection and testing GB/T 20801.6-2020 Pressure piping code—Industrial piping—Part 6:Safeguarding

GB/T 12239-2008 Industrial valves—Diaphragm valves made of metallic materials GB/T 12240-1989 General purpose industrial valves—Iron plug valves GB/T 12240-2008 Iron plug valves GB/T 12241-2005 Safety valves—General requirements GB/T 12241-2021 Safety valves—General requirements GB/T 12242-2005 Performance test code—Pressure relief devices GB/T 12242-2021 Pressure relief devices—Performance test code GB/T 12243-2005 Spring loaded safety valves GB/T 12243-2021 Spring loaded safety valves GB/T 12246-1989 Pilot-operated reducing valves GB/T 12246-2006 Pilot operated pressure reducing valves GB/T 12246-2025 Pilot operated pressure reducing valves GB/T 12459-1990 Steel butt-welding seamless pipe fittings GB/T 12459-2005 Steel butt-welding seamless pipe fittings GB/T 12459-2017 Steel buttwelding pipe fittings—Types and parameter GB/T 12459-2025 Steel buttwelding piping fittings—Types and parameters GB/T 12459-2017 Steel buttwelding pipe fittings—Types and parameter GB/T 12716-2002 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on the threads GB/T 12716-2011 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads GB/T 12771-2000 Welded stainless steel pipes for liquid delivery GB/T 12771-2008 Welded stainless steel pipes for liquid delivery GB/T 12771-2019 Welded stainless steel pipes for fluid transport GB/T 12777-1999 General specification for metal bellows expansion joints GB/T 12777-2008 General specification for metal bellows expansion joints GB/T 12777-2019 General specification for metal bellows expansion joints GB/T 13295-2003 Ductile iron pipes,fittings and accessories for water or gas applications GB/T 13295-2008 Ductile iron pipes,fittings and accessories for water or gas applications GB/T 13295-2013 Ductile iron pipes,fittings and accessories for water or gas applications GB/T 13295-2019 Ductile iron pipes,fittings and accessories for water or gas applications GB/T 13401-1992 Steel plate butt-welding pipe fittings GB/T 13401-2005 Steel plate butt-welding pipe fittings GB/T 13401-2017 Steel buttwelding pipe fittings—Technical specification GB/T 13401-2025 Steel buttwelding piping fittings—Technical specification GB/T 13402-1992 Large-diameter carbon steel pipe flanges GB/T 13402-2010 Large diameter steel pipe flanges GB/T 13402-2019 Large diameter steel pipe flanges GB/T 13403-1992 Gaskets for large-diameter cabon steel pipe flanges GB/T 13403-2008 Gaskets for large-diameter steel pipe flanges GB/T 13403-2023 Gaskets for large-diameter steel pipe flanges GB/T 13793-1992 Longitudinal electric resistance welded steel tubes GB/T 13793-2008 Steel pipes with a longitudinal electric (resistance) weld GB/T 13793-2016 Steel pipes with a longitudinal electric(resistance) weld 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 13932-1992 General purpose industrial valves—Cast iron swing check valves GB/T 13932-2016 Cast iron swing check valves GB/T 14382-1993 Tee strainers for fluids for pipes GB/T 14382-2008 Tee strainers for fluids for pipes GB/T 14383-1993 Forged steel socket welding pipe fittings GB/T 14383-2008 Forged fittings,socket-welding and threaded GB/T 14383-2021 Forged fittings,socket-welding and threaded GB/T 14976-2002 Stainless steel seamless tubes for fluid transport GB/T 14976-2012 Seamless stainless steel pipes for fluid transport GB/T 14976-2025 Seamless stainless steel pipes for fluid transport GB/T 15605-1995 Guide for venting of dust explosions GB/T 15605-2008 Guide for pressure venting of dust explosions GB 15605-2024 Specifications for pressure venting of dust explosion GB/T 15706-2012 Safety of machinery—General principles for design—Risk assessment and risk reduction GB/T 15706.1-1995 Safety of machinery—Basic concept, general principles for design—Part 1:Basic terminology, methodology GB/T 15706.1-2007 Safety of machinery—Basic concepts, general principles for design—Part 1:Basic terminology, methodology GB/T 15706.2-1995 Safety of machinery—Basic concepts, general principles for design—Part 2:Technical principles and specifications GB/T 15706.2-2007 Safety of machinery—Basic concepts, general principles for design—Part 2:Technical principles GB/T 16253-1996 Steel castings for pressure purposes GB/T 16253-2019 Steel castings for pressure purposes GB/T 17116.1-1997 Pipe supports and hangers—Part 1:Technical specification GB/T 17116.1-2018 Pipe supports and hangers—Part 1:Technical specification GB/T 17116.1-2018 Pipe supports and hangers—Part 1:Technical specification GB/T 17116.2-1997 Pipe supports and hangers—Part 2:Pipe attachments GB/T 17116.2-2018 Pipe supports and hangers—Part 2:Pipe attachments GB/T 17116.3等