GB/T 26147-2010 Specification for ball of ball valve

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 231.1-2002 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2009 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2018 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 1220-1992 Stainless steel bars GB/T 1220-2007 Stainless steel bars GB/T 1801-2009 Geometrical Product Specifications (GPS)—Limits and fits—Selection of tolerance zones and fits 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 5270-2005 Metallic coatings on metallic substrates—Electrodeposited and chemically deposited coatings—Review of methods available for testing adhesion GB/T 5270-2024 Metallic coatings on metallic substrates—Electrodeposited and chemically deposited coatings—Review of methods available for testing adhesion GB/T 6461-2002 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates—Rating of test specimens and manufactured articles subjected to corrosion tests GB/T 9790-1988 Metallic and related coatings—Vickers and Knoop microhardness tests GB/T 9790-2021 Metallic materials—Vickers and Knoop microhardness tests of metallic and other inorganic coatings GB/T 12228-1989 General purpose industrial valves—Specification of carbon steel forgings GB/T 12228-2006 General purpose industrial valves—Specification of carbon steel forgings GB/T 12228-2025 General purpose industrial valves—Technical specification for carbon steel forgings GB/T 13913-2008 Metallic coatings—Autocatalytic(Electroless) nickel-phosphorus alloy coatings—Specification and test methods GB/T 15007-2008 Designations of corrosion-resisting alloy GB/T 15007-2017 Designations of corrosion-resistant alloy GB/T 19356-2003 Thermal spraying—Powders—Composition and technical supply conditions JB 4726 JB 4727 JB 4728 JB/T 6396-1992 Large alloy structural steel forgings JB/T 6396-2006 Specification for the heavy alloy structural steel forgings JB/T 6439-2008 Valve pressure parts are inspected by magnetic particle testing JB/T 6439-1992 The valve is subjected to magnetic particle inspection of the pressure die-cast steel parts JB/T 6902-2008 Check method for liquid penetration in valves JB/T 6903-1993 Valve forged steel parts ultrasonic inspection method YS/T 541-2025 Metal thermal spray coating surface Rockwell hardness test method YS/T 542-2025 Method for Determining the Tensile Strength of Metal Thermal Spray Coating