CJ/T 3053-1995 Isolative gas-pressurized expansion device

CJ/T 501-2016 Isolated gas-pressurization device

GB 150-1998 Steel pressure vessels GB/Z 150-2025 Guide for magnetizing behaviour of permanent magnets GB/T 150.1-2011 Pressure vessels—Part 1:General requirements GB/T 150.1-2024 Pressure vessels—Part 1:General requirements GB/T 150.2-2011 Pressure vessels—Part 2:Materials GB/T 150.2-2024 Pressure vessels—Part 2:Materials GB/T 150.3-2011 Pressure vessels—Part 3:Design GB/T 150.3-2024 Pressure vessels—Part 3:Design GB/T 150.4-2011 Pressure vessels—Part 4:Fabrication,inspection and testing,and acceptance GB/T 150.4-2024 Pressure vessels—Part 4:Fabrication,inspection and testing,and acceptance GB 223.1 GB 223.2 GB/T 223.3-1988 Methods for chemical analysis of iron, steel and alloy—The diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus content GB/T 223.4-1988 Methods for chemical analysis of iron, steel and alloy The volumetric method for determination of manganese content by ammonium nitrate oxidation GB/T 223.4-2008 Alloyed steel—Determination of manganese content—Potentiometric or visual titration method GB/T 223.5-1997 Methods for chemical analysis of iron,steel and alloy—The reduced molybdosilicate spectro photometric method for the determination of acid-soluble silicon content GB/T 223.5-2008 Steel and iron—Determination of acid-soluble silicon and total silicon content—Reduced molybdosilicate spectrophotometric method GB/T 228-2002 Metallic materials—Tensile testing at ambient temperature GB/T 228.1-2010 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.2-2015 Metallic materials—Tensile testing—Part 2:Method of test at elevated temperature GB/T 228.3-2019 Metallic materials—Tensile testing—Part 3:Method of test at low temperature GB/T 228.4-2019 Metallic materials—Tensile testing—Part 4:Method of test in liquid helium GB/T 232-1999 Metallic materials—Bend test GB/T 232-2010 Metallic materials—Bend test GB/T 232-2024 Metallic materials—Bend testing method GB/T 528-1998 Rubber,vulcanized or thermoplastic—Determination of tensile stress-strain properties GB/T 528-2009 Rubber,vulcanized or thermoplastic—Determination of tensile stress-strain properties GB/T 531-1999 Rubber—Determination of indentation hardness by means of pocket hardness meters GB/T 531.1-2008 Rubber,vulcanized or thermoplastic—Determination of indentation hardness—Part 1:Duromerer method(Shore hardness) GB/T 531.2-2009 Rubber,vulcanized or thermoplastic—Determination of indentation hardness—Part 2:IRHD pocket meter method GB/T 3323-1987 Methods for radiographic inspection and classification of radiographs for fusion welded butt joints in steel GB/T 3323-2005 Radiographic examination of fusion welded joints in metallic materials GB/T 3323.1-2019 Non-destructive testing of welds—Radiographic testing—Part 1:X-and gamma-ray techniques with film GB/T 3323.2-2019 Non-destructive testing of welds—Radiographic testing—Part 2:X-and gamma-ray techniques with digital detectors GB/T 3512-2001 Rubber, vulcanized or thermoplastic—Accelerated ageing and heat resistance tests—Air-oven method GB/T 3512-2014 Rubber, vulcanized or thermoplastic—Accelerated ageing and heat resistance tests—Air-oven method GB 7251.1-1997 Low-voltage switchgear and control gear assemblies—Part 1:Type-tested and partially type-tested assemblies GB 7251.1-2005 Low-voltage switchgear and control gear assemblies—Part 1:Type-tested and partially type-tested assemblies GB/T 7251.1-2013 Low-voltage switchgear and controlgear assemblies—Part 1:General rules GB/T 7251.1-2023 Low-voltage switchgear and controlgear assemblies—Part 1:General rules GB 7251.2-1997 Low-voltage switchgear and control gear assemblies—Part 2:Particular requirements for busbar trunking systems(busways) GB 7251.2-2006 Low-voltage switchgear and controlgear assemblies—Part 2:Particular requirements for busbar trunking systems (busways) GB/T 7251.2-2023 Low-voltage switchgear and controlgear assemblies—Part 2:Power switchgear and controlgear assemblies GB 7251.3-1997 Low-voltage switchgear and control gear assemblies—Part 3:Particular requirements for low-voltage switchgear and control gear assemblies intended to be installed in places where unskilled persons have access for their use—Distribution boards GB/T 7251.3-2006 Low-voltage switchgear and control gear assemblies—Part 3:Particular requirements for low-voltage switchgear and control gear assemblies intended to be installed in places where unskilled persons have access for their use—Distribution boards GB/T 7251.3-2017 Low-voltage switchgear and controlgear assemblies—Part 3:Distribution boardsintended to be operated by ordinary persons(DBO) GB 7251.4-1998 Low-voltage switchgear and control gear assemblies—Part 4:Particular requirements for assemblies for construction sites(ACS) GB/T 7251.4-2006 Low-voltage switchgear and control gear assemblies—Part 4:Particular requirements for assemblies for construction sites(ACS) GB/T 7251.4-2017 Low-voltage switchgear and controlgear assemblies—Part 4:Particular requirements for assemblies for construction sites(ACS) GB 7251.5-1998 Low-voltage switchgear and control gear assemblies—Part 5:Particular requirements for assemblies intended to be installed outdoors in public places—Cable distribution cabinets (CDCs)for power distribution in networks GB/T 7251.5-2008 Low-voltage switchgear and controlgear assemblies—Part 5:Particular requirements for assemblies for power distribution in public networks GB/T 7251.5-2017 Low-voltage switchgear and controlgear assemblies—Part 5:Assemblies for power distribution in public networks GB/T 7251.5-2025 Low-voltage switchgear and controlgear assemblies—Part 5:Assemblies for power distribution in public networks GB/T 7251.6-2015 Low-voltage switchgear and controlgear assemblies—Part 6:Busbar trunking systems(busways) GB/T 7251.7-2015 Low-voltage switchgear and controlgear assemblies—Part 7:Assemblies for specific applications such as marinas,camping sites,market squares,electric vehicles charging stations GB/T 7251.7-2025 Low-voltage switchgear and controlgear assemblies—Part 7:Assemblies for specific applications such as marinas,camping sites,market squares,electric vehicle charging stations GB/T 7251.8-2005 Low-voltage switchgear and controlgear assemblies—General technology requirement for intelligent assemblies GB/T 7251.8-2020 Low-voltage switchgear and controlgear assemblies—Part 8:General technical requirements for intelligent assembly GB/T 7251.10-2014 Low-voltage switchgear and controlgear assemblies—Part 10:Guidance to specifying assemblies GB/T 7251.10-2025 Low-voltage switchgear and controlgear assemblies—Part 10:Guidance to specifying assemblies GB/T 7251.12-2013 Low-voltage switchgear and controlgear assemblies—Part 2:Power switchgear and controlgear assemblies JB/T 81-2015 Sheet steel plate welding flanged steel pipe flange JB 81-1994 Convex Panel-Type Flat-Weld Steel Pipe Flanges JB 2536 JB/T 4709 HG/T 4836-2015 Catalyst-based zinc oxide