HG/T 20537.2-1992 Technical requirements for welded austenitic stainless steel pipes used in shell and tube heat exchangers

HG/T 20537.1-1992 Stainless steel welded pipes for AISI stainless steel specification selection HG/T 20537.3-1992 The technical requirements for welded steel pipes of austenitic stainless steel used in chemical installations HG/T 20537.4-1992 Technical requirements for large-diameter welded steel pipes made of austenitic stainless steel used in chemical equipment

GB/T 228-2002 Metallic materials—Tensile testing at ambient temperature 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 228.2-2015 Metallic materials—Tensile testing—Part 2:Method of test at elevated temperature GB/T 228.3-2019 Metallic materials—Tensile testing—Part 3:Method of test at low temperature GB/T 228.4-2019 Metallic materials—Tensile testing—Part 4:Method of test in liquid helium 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 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 230.1-2004 Metallic Rockwell hardness test—Part1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2009 Metallic materials—Rockwell hardness test—Part 1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2018 Metallic materials—Rockwell hardness test—Part 1:Test method GB/T 230.2-2002 Metallic rockwell hardness test—Part 2:Verification and calibration of hardness testers(scales A,B,C,D,E,F,G,H,K,N,T) GB/T 230.2-2012 Metallic materials—Rockwell hardness test—Part 2:Verification and calibration of testing machines GB/T 230.2-2022 Metallic materials—Rockwell hardness test—Part 2:Verification and calibration of testing machines and indenters GB/T 230.3-2002 Metallic rockwell hardness test—Part 3:Calibration of hardness reference blocks(scales A,B,C,D,E,F,G,H,K,N,T) GB/T 230.3-2012 Metallic materials—Rockwell hardness test—Part 3:Calibration of reference blocks(scales A,B,C,D,E,F,G,H,K,N,T) GB/T 230.3-2022 Metallic materials—Rockwell hardness test—Part 3:Calibration of reference blocks GB/T 241-1990 Metal tubes—Hydrostatic pressure testing GB/T 241-2007 Metal materials—Tube—Hydrostatic pressure test GB/T 242-1997 Metallic materials—Tube—Drift expanding test GB/T 242-2007 Metal materials—Tube—Drift-expending 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 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 4230 GB/T 4239-1991 Cold rolled stainless steel and heatresisting steel strips GB/T 4334.5-2000 Method of copper sulfate-sulfuric acid test for stainless steels 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 HG/T 20537.1-1992 Stainless steel welded pipes for AISI stainless steel specification selection GB/T 241-2025 Metallic materials—Tube—Hydrostatic pressure test GB/T 222-2025 Steels and alloys—Permissible deviations of product analyzed chemical composition