GB/T 45472-2025 Prefabricated insulation pipes for overhead and utility tunnel

GB/T 2518-1988 Continual hot-dip zinc-coated steel sheets and strips GB/T 2518-2004 Continuous hot-dip zinc-coated steel sheets and strips GB/T 2518-2008 Continuously hot-dip zinc-coated steel sheet and strip GB/T 2518-2019 Continuously hot-dip zinc and zinc alloy coated steel sheet and strip GB 3087-1999 Seamless steel tubes for low and medium pressure GB/T 3087-2008 Seamless steel tubes for low and medium pressure boiler GB/T 3087-2022 Seamless steel tubes and pipes for low and medium pressure boiler GB/T 3091-2001 Welded steel pipe for low pressure liquid delivery GB/T 3091-2008 Welded steel pipes for low pressure liquid delivery GB/T 3091-2015 Welded steel pipes for low pressure liquid delivery GB/T 3091-2025 Welded steel pipes for low pressure fluid delivery GB/T 3280-1992 Cold rolled stainless steel sheets and plates GB/T 3280-2007 Cold rolled stainless steel plate, sheet and strip GB/T 3280-2015 Cold rolled stainless steel plate, sheet and strip GB/T 3880.2-2006 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 2:Mechanical properties GB/T 3880.2-2012 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 2:Mechanical properties GB/T 3880.2-2024 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 2:Mechanical properties GB/T 3880.3-2006 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 3:Tolerances on forms and dimensions GB/T 3880.3-2012 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 3:Tolerances on forms and dimensions GB/T 3880.3-2024 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 3:Tolerances on forms and dimensions GB/T 8163-1999 Seamless steel tubes for liquid service GB/T 8163-2008 Seamless steel tubes for liquid service GB/T 8163-2018 Seamless steel pipes for liquid service GB 8624-1997 Classification on burning behaviors for building materials GB 8624-2006 Classification for burning behavior of building materials and products GB 8624-2012 Classification for burning behavior of building materials and products GB 8624-2025 Classification for burning behavior of building materials and products GB/T 8923.1-2011 Preparation of steel substrates before application of paints and related products—Visual assessment of surface cleanliness—Part 1:Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings GB/T 9711-2011 Petroleum and natural gas industries—Steel pipe for pipeline transportation systems GB/T 9711-2017 Petroleum and natural gas industries—Steel pipe for pipeline transportation systems GB/T 9711-2023 Petroleum and natural gas industries—Steel pipe for pipeline transportation systems GB/T 9711.1-1997 Petroleum and natural gas industries—Steel pipe for pipelines—Technical delivery conditions—Part 1:Pipes of requirements class A GB/T 9711.2-1999 Petroleum and natural gas industries—Steel pipe for pipelines—Technical delivery conditions—Part 2:Pipes of requirement class B GB/T 9711.3-2005 Petroleum and natural gas industries—Steel pipe for pipelines—Technical delivery conditions—Part 3:Pipes of requirements class C GB/T 10699-1998 Calcium silicate insulation GB/T 10699-2015 Calcium silicate thermal insulation 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 12754-1991 Coloured paint coat steel plates and strips GB/T 12754-2006 Prepainted steel sheet GB/T 12754-2019 Prepainted steel sheet and strip GB/T 13350-2000 Glass wool and their products for thermal insulation GB/T 13350-2008 Glass wool and their products for thermal insulation GB/T 13350-2017 Glass wool and its products for thermal insulation 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 16400-1996 Aluminium silicate wool and their products for thermal insulation GB/T 16400-2003 Aluminium silicate wool and it's products for thermal insulation GB/T 16400-2015 Aluminium silicate wool and it's products for thermal insulation GB/T 16400-2023 Aluminosilicate wool and it’s products for thermal insulation 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 17116.2-1997 Pipe supports and hangers—Part 2:Pipe attachments GB/T 17116.2-2018 Pipe supports and hangers—Part 2:Pipe attachments GB/T 29046-2012 Test methods of technical specification for pre-insulated directly buried district heating pipes GB/T 29046-2023 Detection methods of technical specification for pre-insulated district heating pipes GB/T 29047-2012 Prefabricated directly buried insulating pipes and fittings with polyurethane [PUR]foamed-plastics and high density polyethylene [PE]casing pipes GB/T 29047-2021 Prefabricated directly buried insulating pipes and fittings with polyurethane foamed-plastics and high density polyethylene casing pipes GB/T 34336-2017 Reinforced nanoporous aerogel products for thermal insulation GB 50236-2011 Code for construction and acceptance of field equipment, industrial pipe welding engineering GB 50683-2011 Code for acceptance of field equipmemt,industrial pipe welding construction quality GB 50764-2012 Design code of power piping for power plant NB/T 47013.2-2015 Non-destructive testing of pressure equipment - Part 2: Radiographic testing NB/T 47013.3-2023 Non-destructive testing of pressure equipment - Part 3: Ultrasonic testing NB/T 47013.5-2015 Non-destructive testing of pressure equipment - Part 5: Penetrant testing NB/T 47014-2023 Pressure equipment welding process qualification SY 5257-1991 Steel Bending Pipe SY/T 5257-2012 Steel Induction Heating Bending Tubes for Oil and Gas Transportation SY/T 5257-2004 Steel bends for oil and gas transportation