GB/T 14383-2008 Forged fittings,socket-welding and threaded

GB/T 14383-1993 Forged steel socket welding pipe fittings GB/T 14626-1993 Forged steel threaded pipe fittings

GB/T 14383-2021 Forged fittings,socket-welding and threaded

GB/T 223.78-2000 Methods for chemical analysis of iron,steel and alloy—Curcumin spectrophotometric method for the determination of boron content GB/T 223.79-2007 Iron and steel—Determination of multi-element contents—X-ray fluorescence spectrometry(Routine method) GB/T 223.80-2007 Iron,steel and alloy—Determination of trace bismuth and arsenic contents—Hydride generation-atomic fluorescence spectrometric method GB/T 223.81-2007 Iron,steel and alloy—Determination of total aluminum and total boron contents—Microwave digestion-inductively coupled plasma mass spectrometric method GB/T 223.82-2007 Steel and iron—Determination of hydrogen content—Inert gas impulse fusion heat conductivity method GB/T 223.82-2018 Steel and iron—Determination of hydrogen content—Thermal conductivity/infrared method after fusion under inert gas GB/T 223.83-2009 Steel and iron—Determination of high sulfur content—Infrared absorption method after combustion in an induction furnace GB/T 223.84-2009 Steel and iron—Determination of titanium content—Diantipyrylmethane spectrophotometric method GB/T 223.85-2009 Steel and iron—Determination of sulfur content—Infrared absorption method after combustion in an induction furnace GB/T 223.86-2009 Steel and iron—Determination of total carbon content—Infrared absorption method after combustion in an induction furnace GB/T 223.87-2018 Iron, steel and alloy—Determination of calcium and magnesium—Inductively coupled plasma mass spectrometric method GB/T 223.88-2019 Iron,steel and alloy—Determination of calcium and magnesium contents—Inductively coupled plasma atomic emission spectrometric method GB/T 223.89-2019 Iron,steel and alloy—Determination of tellurium content—Hydride generation-atomic fluorescence spectrometric method GB/T 223.90-2021 Iron,steel and alloy—Determination of silicon content—Inductively coupled plasma atomic emission spectrometric method GB/T 223.91-2021 Iron,steel and alloy—Determination of copper—2,2′-Biquinoline spectrophotometric method GB/T 223.92-2023 Iron, steel and alloy—Determination of lanthanum, cerium, praseodymium, neodymium and samarium content—Inductively coupled plasma mass spectrometry 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 699-1999 Quality carbon structural steels GB/T 699-2015 Quality carbon structure 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 1220-1992 Stainless steel bars GB/T 1220-2007 Stainless steel bars GB/T 1221-1992 Heat-resisting steel bars GB/T 1221-2007 Heat-resistant steel bars 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 3077-1999 Alloy structure steels GB/T 3077-2015 Alloy structure steels GB/T 4334-2008 Corrosion of metals and alloys—Test methods for intergranular corrosion of stainless steels GB/T 4334-2020 Corrosion of metals and alloys—Test methods for intergranular corrosion of austenitic and ferritic-austenitic (duplex) stainless steels GB/T 4334.1-2000 Method of 10 per cent oxalic acid etch test for stainless steels GB/T 4334.2-2000 Method of ferric sulfate-sulfuric acid test for stainless steels GB/T 4334.3-2000 Method of 65 percent nitric acid test for stainless steels GB/T 4334.4-2000 Method of nitric-hydrofluoric acid test for stainless steels GB/T 4334.5-2000 Method of copper sulfate-sulfuric acid test for stainless steels GB/T 4334.6-2000 Method of 5 per cent sulfuric acid test for stainless steels GB/T 4334.6-2015 Test method for stainless steels in 5% sulfuric acid GB/T 4338-1995 Metallic materials—Tensile testing at elevated temperature GB/T 4338-2006 Metallic materials—Tensile testing at elevated temperature GB/T 6394-2002 Metal-methods for estimating the average grain size GB/T 6394-2017 Determination of estimating the average grain size of metal GB/T 10561-2005 Steel—Determination of content of nonmetallic inclusions—Micrographic method using standards diagrams GB/T 12716-2002 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on the threads GB/T 12716-2011 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads GB/T 17394-1998 Metallic materials—Leeb hardness test GB/T 17394.1-2014 Metallic materials—Leeb hardness test—Part 1:Test method GB/T 17394.1-2025 Metallic materials—Leeb hardness test—Part 1:Test method GB/T 17394.2-2012 Metallic materials—Leeb hardness test—Part 2:Verification and calibration of hardness testers GB/T 17394.2-2022 Metallic materials—Leeb hardness test—Part 2:Verification and calibration of hardness testers GB/T 17394.3-2012 Metallic materials—Leeb hardness test—Part 3:Calibration of reference blocks GB/T 17394.3-2022 Metallic materials—Leeb hardness test—Part 3:Calibration of reference test blocks GB/T 17394.4-2014 Metallic materials—Leeb hardness test—Part 4:Tables of hardness values conversation GB/T 18253-2000 Steel and steel products—Types of inspection documents GB/T 18253-2018 Steel and steel products—Types of inspection documents GB/T 20066-2006 Steel and iron—Sampling and preparation of samples for the determination of chemical composition JB/T 4730.3-2005 Nondestructive testing of pressure equipments—Part 3:Ultrasonic testing JB/T 4730.4-2005 Nondestructive testing of pressure equipments—Part 4:Magnetic particle testing JB/T 4730.5-2005 Nondestructive testing of pressure equipments—Part 5:Penetrant testing ASME B36.10M

ASME B16.11:2005