CJ/T 246-2018 Preformed directly buried steam insulating pipes and fittings for urban heating

CJ/T 200-2004 Preformed directly buried steam insulating pipes technical-specification for heating in city CJ/T 246-2007 Technical specification of preformed directly buried steam insulating pipeline accessories for municipal heat-supply

GB/T 985.1-2008 Recommended joint preparation for gas welding,manual metal arc welding,gas-shield arc welding and beam welding GB/T 985.2-2008 Recommended joint preparation for submerged arc welding 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 3198-1996 Aluminium foil for general purpose GB/T 3198-2003 Aluminium and aluminium—Alloy foil GB/T 3198-2010 Aluminium and aluminium alloys foils GB/T 3198-2020 Aluminium and aluminium alloy foils 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/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 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 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 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 17393-1998 Standard specification of thermal insulation materials for use over austenitic stainless steel GB/T 17393-2008 Specification for thermal insulation for use in contact with austenitic stainless steel GB/T 17430-1998 Estimating the maximum use temperature of thermal insulation GB/T 17430-2015 Estimating the maximum service temperature of thermal insulation GB/T 28638-2012 Heat loss test for thermal insulation structure and evaluation methods for thermal insulation efficiency of district heating pipes 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 CJJ 28-2014 Code for construction and acceptance of city heating pipelines CJJ/T 104-2014 Technical specification for directly buried steam heating pipeline in city JC/T 618-2019 Chemical analysis methods for solutes such as chloride, fluoride, silicate, and sodium in insulation materials JC/T 618-2005 Chemical analysis methods for solutes containing chloride, fluoride, silicate, and sodium in thermal insulation materials NB/T 47013.2-2015 Non-destructive testing of pressure equipment - Part 2: Radiographic testing NB/T 47013.3-2015 Non-destructive testing of pressure equipment - Part 3: Ultrasonic testing NB/T 47013.4-2015 "Non-destructive testing of pressure equipment - Part 4: Magnetic particle testing" SY/T 5037-2023 Underground arc welding steel pipe for general fluid conveyance pipeline SY/T 5037-2018 Underground arc welding steel pipe for general fluid conveyance pipeline SY/T 5037-2012 Submerged arc welded steel pipe for general fluid conveying pipelines SY/T 5037-2000 SY/T 5037-2000 Screw-Gap Soldering Steel Pipe for Low-Pressure Pipeline Transportation System 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 ASTM C1371-04a