JG/T 381-2012 Cold-formed welded circular tubes for building structures

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 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 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 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 700-1988 Carbon structural steels GB/T 700-2006 Carbon structural steels GB/T 1591-1994 High strength low alloy structural steels GB/T 1591-2008 High strength low alloy structural steels GB/T 1591-2018 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 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 5313-1985 Steel plate with through-thickness characteristics GB/T 5313-2010 Steel plates with through-thickness characteristics GB/T 5313-2023 Steel plate with through-thickness properties GB/T 11345-1989 Method for manual ultrasonic testing and classification of testing results for ferritic steel welds GB/T 11345-2013 Non-destructive testing of welds—Ultrasonic testing—Techniques,testing levels,and assessment GB/T 11345-2023 Non-destructive testing of welds—Ultrasonic testing—Techniques, testing levels and assessment GB/T 13793-1992 Longitudinal electric resistance welded steel tubes GB/T 13793-2008 Steel pipes with a longitudinal electric (resistance) weld GB/T 13793-2016 Steel pipes with a longitudinal electric(resistance) weld GB/T 19879-2005 Steel plates for building structure GB/T 19879-2015 Steel plate for building structure GB/T 19879-2023 Steel Plate for building structure GB/T 21835-2008 Dimensions and masses per unit length of welded steel pipes GB 50205-2001 Code for acceptance of construction quality of steel structures GB 50205-2020 Standard for acceptance of construction quality of steel structures GB/T 222-2025 Steels and alloys—Permissible deviations of product analyzed chemical composition