GB/T 31940-2025 Bi-metal composite steel pipes for fluid transportation

GB/T 31940-2015 Bi-metal composite corrosion resistance steel pipe for fluid transportation GB/T 32958-2016 Stainless steel clad pipes for fluid transport

GB/T 4336-2016 Carbon and low-alloy steel—Determination of multi-element contents—Spark discharge atomic emission spectrometric method (routine method) GB/T 4340.1-1999 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4340.1-2009 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4340.1-2024 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 5117-1995 Carbon steel covered electrodes GB/T 5117-2012 Covered electrodes for manual metal arc welding of non-alloy and fine grain steels GB/T 5118-1995 Low alloy steel covered electrodes GB/T 5118-2012 Covered electrodes for manual metal arc welding of creep-resisting steels GB 5135.11-2006 Automatic sprinkler system—Part 11:Grooved couplings and fittings GB 5135.11-2025 Automatic sprinkler systems—Part 11:Grooved pipe couplings and fittings GB/T 5293-1999 Carbon steel electrodes and fluxs for submerged arc welding GB/T 5293-2018 Solid wire electrodes,tubular cored electrodes and electrode/flux combinations for submerged arc welding of non alloy and fine grain steels GB 5310-1995 Seamless steel tubes and pipes for high pressure boiler GB/T 5310-2008 Seamless steel tubes and pipes for high pressure boiler GB/T 5310-2017 Seamless steel tubes and pipes for high pressure boiler GB/T 5310-2023 Seamless steel tubes and pipes for high pressure boiler GB/T 5777-1996 Seamless steel pipe and tubing—Methods for ultrasonic testing GB/T 5777-2008 Seamless steel pipe and tubing methods for ultrasonic testing GB/T 5777-2019 Automated full peripheral ultrasonic testing of seamless and welded(except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections GB/T 6396-1995 Clad plates—Machanical and technological test GB/T 6396-2008 Clad steel plates—Mechanical and technological test GB/T 7306.2-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 2:Taper internal and external threads GB/T 8110-1995 Welding wires for gas shielding arc welding of carbon and low alloy steels GB/T 8110-2008 Welding electrodes and rods for gas shielding arc welding of carbon and low alloy steel GB/T 8110-2020 Wire electrodes and weld deposits for gas shielded metal arc welding of non alloy and fine grain steels 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 8165-1997 Stainless steel clad plates and strips GB/T 8165-2008 Stainless steel clad plates,sheets and strips GB/T 8165-2025 Stainless steel clad plate,sheet and strip GB/T 8363-1987 Metallic materials—Drop-weight tear tests of ferritic steels GB/T 8363-2007 Test method for drop-weight tear tests of steel products GB/T 8363-2018 Steel—Drop-weight tear tests method 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 9124.1-2019 Steel pipe flanges—Part 1:PN designated 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 9948-1988 Seamless steel tubes for petroleum cracking GB 9948-2006 Seamless steel tubes for petroleum cracking GB/T 9948-2013 Seamless steel tubes for petroleum cracking GB/T 9948-2025 Seamless steel tubes and pipes for petrochemical and chemical facilities GB/T 11170-1989 Method for photoelectric emission spectroscopic analysis of stainless steel GB/T 11170-2008 Stainless steel—Determination of multi-element contents—Spark discharge atomic emission spectrometric method(Routine method) 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 12470-1990 Fluxes for the submerged arc welding of low alloy steel GB/T 12470-2003 Low-alloy steel electrodes and fluxes for submerged arc welding GB/T 12470-2018 Solid wire electrodes,tubular cored electrodes and electrode/flux combinations for submerged arc welding of creep-resisting steels 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 13305-1991 Austenitic stainless steels—Determination of area content of the α-phase—Micrographic method using standard diagrams GB/T 13305-2008 Micrographic method for determining area content of the α-phases in stainless steels GB/T 13305-2024 Method for determining content of the α-phase in stainless steels 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 13814-1992 Nickel and nickel alloy covered welding electrodes GB/T 13814-2008 Nickel and nickel alloy covered welding electrodes GB/T 13814-2025 Covered electrodes for manual metal arc welding of nickel and nickel alloys GB/T 14957-1994 Steel wires for melt welding GB/T 15007-2008 Designations of corrosion-resisting alloy GB/T 15007-2017 Designations of corrosion-resistant alloy GB/T 15260-1994 Nickel-based alloys—Determination of resistance to intergranular corrosion GB/T 15260-2016 Corrosion of metals and alloys—Test methods for intergranular corrosion of nickel alloys GB/T 15620-1995 Nickel and nickel alloy welding wires GB/T 15620-2008 Nickel and nickel alloy wires and rodes GB/T 15620-2025 Solid wire electrodes,solid strip electrodes, solid wires and solid rods for fusion welding of nickel and nickel alloys GB/T 16957-1997 Mechanical tests on welded joints in clad plates GB/T 16957-2012 Clad teel plates—Mechanical technical tests on welded joints GB/T 17219-1998 Standard for safety evaluation of equipment and protective materials in drinking water system GB/T 17219-2025 Hygienic safety evaluation of distribution equipment,protective materials and treatment materials in drinking water system GB/T 17854-1999 Stainless steel electrodes and fluxs for submerged arc welding GB/T 17854-2018 Solid wire electrodes/flux combinations for submerged arc welding of stainless steels GB/T 20066-2006 Steel and iron—Sampling and preparation of samples for the determination of chemical composition GB/T 20123-2006 Steel and iron—Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method) GB/T 20124-2006 Steel and iron—Determination of nitrogen content—Thermal conductimetric method after fusion in a current of inert gas (Routine method) GB/T 20125-2006 Low-alloy steel—Determination of multi-element contents—Inductively coupled plasma atomic emission spectrometric method GB/T 20490-2006 Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes—Ultrasonic testing for the detection of laminar imperfections GB/T 20490-2023 Non-destructive testing(NDT) methods of steel tubes—Automated ultrasonic testing of seamless and welded steel tubes for the detection of laminar imperfections GB/T 21832.2-2018 Welded austenitic-ferritic(duplex)stainless steel tubes and pipes—Part 2:Pipes for fluid transport GB/T 30062-2013 Terminology of steel pipes and tubes GB/T 36019-2018 Specification for grooved pipe fittings GB/T 40385-2021 Non-destructive testing of steel tubes—Digital radiographic testing of the weld seam of welded steel tubes for the detection of imperfections GB/T 40791-2021 Non-destructive testing of steel tubes—Radiographic testing of the weld seam of welded steel tubes for the detection of imperfections GB/T 42662-2023 Non-destructive testing of steel tubes—Automated ultrasonic testing for the detection of laminar imperfections in strip/plate used for the manufacture of welded steel tubes GB/T 42664-2023 Non-destructive testing of steel tubes—Automated ultrasonic testing of the weldseam of welded steel tubes for the detection of longitudinal and/or transverse imperfections GB/T 42677-2023 Non-destructive testing (NDT) methods of steel tubes—Liquid penetrant inspection of seamless and welded steel tubes for the detection of surface imperfections NB/T 47013.2-2015 Non-destructive testing of pressure equipment - Part 2: Radiographic testing NB/T 47013.5-2015 Non-destructive testing of pressure equipment - Part 5: Penetrant testing NB/T 47013.11-2023 Non-destructive testing of pressure equipment - Part 11: Digital imaging detection using X-ray technology NB/T 47013.11-2015 Non-destructive testing of pressure equipment - Part 11: X-ray digital imaging testing NB/T 47014-2023 Pressure equipment welding process qualification SY/T 6601-2017 Corrosion-resistant alloy pipeline tube SY/T 6601-2004 Corrosion-resistant alloy pipeline steel tube YB/T 4282-2012 Hot rolled stainless steel composite plate for pressure vessels YB/T 5092-2016 stainless steel wire for welding YB/T 5092-1996 Stainless steel wire for welding