GB/T 37577-2019 Welded large diameter steel pipes for low-temperature-service piping

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 223.9-2000 Methods for chemical analysis of iron,steel and alloy The chrom azurol S photometric method for the determination of aluminium content GB/T 223.9-2008 Iron,steel and alloy—Determination of aluminium content—Chrome azurol S photometric 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 223.14-2000 Methods for chemical analysis of iron,steel and alloy The N-benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium 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 223.23-1994 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 223.26-1989 Methods for chemical analysis of iron, steel and alloy The thiocyanate direct photometric method for the determination of molybdenum content GB/T 223.26-2008 Iron,steel and alloy—Determination of molybdenum content—The thiocyanate spectrophotometric method 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 223.58-1987 Methods for chemical analysis of iron，steel and alloy--The extraction-absorption catalytic polarographic method for the determination of manganese content GB/T 223.62-1988 Methods for chemical analysis of iron,steel and alloy—The butyl acetate extraction photometric method for the determination of phosphorus content GB/T 223.68-1997 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 223.84-2009 Steel and iron—Determination of titanium content—Diantipyrylmethane spectrophotometric method GB/T 223.86-2009 Steel and iron—Determination of total carbon content—Infrared absorption method after combustion in an induction furnace 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 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 3531-1996 Low alloy steel plates for low temperature pressure vessels GB 3531-2008 Low alloy steel plates for low temperature pressure vessels GB/T 3531-2014 Steel plates for low temperature pressure vessels 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 19293-2003 Method of X-ray radioscopy for butt-weld 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 20125-2006 Low-alloy steel—Determination of multi-element contents—Inductively coupled plasma atomic emission spectrometric method GB/T 21835-2008 Dimensions and masses per unit length of welded steel pipes GB/T 26955-2011 Destructive tests on welds in metallic materials—Macroscopic and microscopic examination of welds NB/T 47014-2023 Pressure equipment welding process qualification 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 Non-destructive testing methods for pressure-bearing welded steel pipes used in the oil and gas industry. Ultrasonic testing of delamination defects near the welds of welded steel pipes SY/T 6423.5-2014 The NDT Methods for Oil and Gas Industry: Tubing and Tubular Goods Part 5: Digital Radiographic Inspection for Defects in Welded Tubular Goods SY/T 6423.5-1999 SY/T 6423.5-1999 Nondestructive testing methods for pressure-welded steel pipes used in the oil and natural gas industry - Ultrasonic testing of steel strips/sheets for welding pipe manufacturing