GB/T 31940-2015 Bi-metal composite corrosion resistance steel pipe for fluid transportation

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

GB/T 222-1984 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB/T 222-2006 Permissible tolerances for chemical composition of steel products GB/T 222-2025 Steels and alloys—Permissible deviations of product analyzed chemical composition 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 223.11-1991 Methods for chemical analysis of iron, steel and alloy The ammonium persulfate oxidation volumetric method for the determination of chromium content GB/T 223.11-2008 Iron,steel and alloy—Determination of chromium content—Visual titration or potentiometric titration method GB/T 223.11-2025 Iron, steel and alloy—Determination of chromium content—Titrimetric method and spectrophotometric method GB/T 223.12-1991 Methods for chemical analysis of iron, steel and alloy—The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content GB/T 223.17-1989 Methods for chemical analysis of iron, steel and alloy The diantipyrylmethane photometric method for the determination of titanium content GB/T 223.18-1994 Methods for chemical analysis of iron, steel and alloy The sodium thiosulfate separation iodimetric method for the determination of cupper content GB/T 223.19-1989 Methods for chemical analysis of iron, steel and alloy The neocuproine-chloroform extraction photometric method for the determination of copper content GB/T 223.23-1994 Methods for chemical analysis of iron, steel and alloy—The dimethylglyoxime spectrophotometric method for the determination of nickel content GB/T 223.23-2008 Iron,steel and alloy—Determination of nickel content—The dimethylglyoxime spectrophotometric method GB/T 223.25-1994 Methods for chemical analysis of iron, steel and alloy The dimethylglyoxime gravimetric method for the determination of nickel content GB/T 223.28-1989 Methods for chemical analysis of iron, steel and alloy The α-benzoinoxime gravimetric method for the determination of molybdenum content GB/T 223.37-1989 Methods for chemical analysis of iron, steel and alloy The indophenol blue photometric method for the determination of nitrogen content after distillation separation GB/T 223.37-2020 Iron,steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation GB/T 223.40-1985 Methods for chemical analysis of iron, steel and alloy—The anion-exchange separation-sulphochlorophenol S photometric method for the determination of niobium content GB/T 223.40-2007 Iron,steel and alloy—Determination of niobium content by the sulphochlorophenol S spectrophotometric method GB/T 223.54-1987 Methods for chemical analysis of iron,steel and alloy—The flame atomic absorption spectrophotometric method for the determination of nickel content GB/T 223.54-2022 Iron,steel and alloy—Determination of nickel content—Flame atomic absorption spectrometric method GB/T 223.58-1987 Methods for chemical analysis of iron，steel and alloy--The extraction-absorption catalytic polarographic method for the determination of manganese content GB/T 223.59-2008 Iron,steel and alloy—Determination of phosphorus content—Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method GB/T 223.60-1997 Methods for chemical analysis of iron,steel and alloy—The perchloric acid dehydration gravimetric method for the determination of silicon content GB/T 223.60-2024 Iron,steel and alloy—Determination of silicon content—Gravimetric method GB/T 223.62-1988 Methods for chemical analysis of iron,steel and alloy—The butyl acetate extraction photometric method for the determination of phosphorus content GB/T 223.63-1988 Methods for chemical analysis of iron,steel and alloy—The sodium(potassium)periodate photometric method for the determination of manganese content GB/T 223.63-2022 Iron,steel and alloy—Determination of manganese content—Sodium(potassium) periodate spectrophotometric method GB/T 223.64-1988 Methods for chemical analysis of iron,steel and alloy—The flame atomic absorption spectrometric method forthe determination of manganese content GB/T 223.64-2008 Iron,steel and alloy—Determination of manganese content—Flame atomic absorption spectrometric method GB/T 223.67-1989 Methods for chemical analysis of iron, steel and alloy—The reducing distillation-methylene blue photometric method for the determination of sulfur content GB/T 223.67-2008 Iron,steel and alloy—Determination of sulfur content—Methylene blue spectrophotometric method GB/T 223.68-1997 Methods for chemical analysis of iron,steel and alloy The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content GB/T 223.69-1997 Methods for chemical analysis of iron,steel and alloy The gas- volumetric method after combustion in the pipe furnace for the determination of carbon content GB/T 223.69-2008 Iron,steel and alloy—Determination of carbon contents—Gas-volumetric method after combustion in the pipe furnace GB/T 223.71-1997 Methods for chemical analysis of iron,steel and alloy—The gravimetric method after combustion in the pipe furnace for the determination of carbon content GB/T 223.72-1991 Methods for chemical analysis of iron, steel and alloy—The alumina chromatographic separation-barium sulfate gravimetric method for the determination of sulphur content GB/T 223.72-2008 Iron,steel and alloy—Determination of sulfur content—Gravimetric method GB/T 226-1991 Etch test for macrostructure and defect of steels GB/T 226-2015 Test method for macrostructure and defect of steel by etching 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 229-1994 Metallic materials—Charpy notch impact test GB/T 229-2007 Metallic materials—Charpy pendulum impact test method GB/T 229-2020 Metallic materials—Charpy pendulum impact test method GB/T 241-1990 Metal tubes—Hydrostatic pressure testing GB/T 241-2007 Metal materials—Tube—Hydrostatic pressure test GB/T 241-2025 Metallic materials—Tube—Hydrostatic pressure test GB/T 246-1997 Metallic materials—Tube—Flattening test GB/T 246-2007 Metal materials—Tube—Flattening test GB/T 246-2017 Metallic materials—Tube—Flattening test GB/T 700-2006 Carbon structural steels GB/T 1591-2008 High strength low alloy structural steels GB/T 2102-1988 Acceptance, packing, marking, and certification of pipe GB/T 2102-2006 Acceptance, packing, marking and quality certification of steel pipe GB/T 2102-2022 Acceptance,packaging,marking and quality certification for steel tubular products GB/T 2650-1989 Method of impact test for welded joint GB/T 2650-2008 Impact test methods on welded joints GB/T 2650-2022 Destructive tests on welds in metallic materials—Impact tests GB/T 2651-1989 Method of tensile test for welded joint GB/T 2651-2008 Tensile test method on welded joints GB/T 2651-2023 Destructive tests on welds in metallic materials—Transverse tensile test GB/T 2653-1989 Methods of bend and compression tests for welded joint GB/T 2653-2008 Bend test methods on welded joints GB/T 2975-1998 Steel and steel products—Location and preparation of test pieces for mechanical testing GB/T 2975-2018 Steel and steel products—Location and preparation of samples and test pieces for mechanical testing GB/T 4334-2008 Corrosion of metals and alloys—Test methods for intergranular corrosion of stainless steels 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 4336-2002 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-Alloy steel(routine method) GB/T 4336-2016 Carbon and low-alloy steel—Determination of multi-element contents—Spark discharge atomic emission spectrometric method (routine method) GB/T 6396-2008 Clad steel plates—Mechanical and technological test GB/T 7734-2004 Method for ultrasonic testing of clad steel plates GB/T 7734-2015 Method for ultrasonic testing of clad steel plates GB/T 7735-1995 Steel tubes—The inspection method on eddy current test GB/T 7735-2004 Steel tubes-The inspection method on eddy current test GB/T 7735-2016 Automated eddy current testing of seamless and welded(except submerged arc-welded) steel tubes for detection of imperfections GB/T 9711-2011 Petroleum and natural gas industries—Steel pipe for pipeline transportation systems 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 13148-2008 Specification for welding of stainless steel clad plates 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 15260-1994 Nickel-based alloys—Determination of resistance to intergranular corrosion GB/T 17395-1998 Dimensions、shapes、masses and tolerances of seamless steel tubes GB/T 17395-2008 Dimensions,shapes,masses and tolerances of seamless steel tubes GB/T 17395-2024 Dimensions,shapes,masses and tolerances of steel tubes 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 21835-2008 Dimensions and masses per unit length of welded steel pipes JB/T 4730.5-2005 Nondestructive testing of pressure equipments—Part 5:Penetrant testing SY/T 6423.1-2013 Petroleum and natural gas industries - Non-destructive testing methods for steel pipes - Part 1: Radiographic testing of welded pipe welds SY/T 6423.1-1999 The non-destructive testing methods for pressure-bearing welded steel pipes used in the oil and natural gas industry and the radiation testing of weld defects in buried arc welding steel pipes SY/T 6423.2-2013 Petroleum and natural gas industries - Non-destructive testing methods for steel pipes - Part 2: Automatic ultrasonic testing of longitudinal and/or transverse defects in welded steel pipes welds SY/T 6423.2-1999 The non-destructive testing methods for pressure-resistant welded steel pipes used in the oil and natural gas industry include ultrasonic testing of longitudinal defects of welds for resistance welding and induction welding pipes SY/T 6423.4-2013 Petroleum and natural gas industries - Non-destructive testing methods for steel pipes - Part 4: Automatic ultrasonic testing of defects in seamless and welded steel pipes due to layering SY/T 6423.4-1999 SY/T 6476-2017 The SY/T 6476-2017 method for drop-hammer tearing test of pipeline steel pipes SY/T 6476-2000 SY/T 6476-2013 Drop hammer tearing test method for pipeline steel pipes SY/T 6476-2007 Dropped hammer testing method for conveying steel pipes