General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 32957-2016
Scope
This standard specifies the classification and code, order content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and Quality certificate. This standard applies to cold-drawn or cold-rolled precision inner-diameter seamless steel pipes (hereinafter referred to as steel pipes) for hydraulic and pneumatic system equipment with an inner diameter of 25 mm to 500 mm.
GB/T 32957-2016 Referenced Document
GB/T 1031 Geometrical Product Specifications(GPS).Surface texture:Profile method.Surface roughness parameters and their values
GB/T 1591-2008 High strength low alloy structural steels
GB/T 2102 Acceptance, packaging, marking and quality certification for steel tubular products*， 2022-10-14 Update
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.12 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 223.23 Iron,,steel and alloy.Determination of nickel content.The dimethylglyoxime spectrophotometric method
GB/T 223.26 Iron,steel and alloy.Determination of molybdenum content.The thiocyanate spectrophotometric method
GB/T 223.5 Steel and iron.Determination of acid-soluble silicon and total silicon content.Reduced molybdosilicate spectrophotometric method
GB/T 223.53 Methods for chemical analysis of iron,steel and alloy--The flame atomic absorption spectrophotometric method for the determination of copper content
GB/T 223.59 Iron,steel and alloy.Determination of phosphorus content.Bismuth phosphomolybdate blue spectrophotometic method and antimony phosphomolybdate blue spectruophotometric method
GB/T 223.63 Iron, steel and alloy—Determination of manganese content—Sodium (potassium) periodate spectrophotometric method*， 2022-07-11 Update
GB/T 223.68 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 223.69 Iron,steel and alloy.Determination of carbon contents.Gas-volumetric method after combustion in the pipe furnace
GB/T 228.1 Metallic materials—Tensile testing—Part 1: Method of test at room temperature*， 2021-12-31 Update
GB/T 229 Metallic materials—Charpy pendulum impact test method*， 2020-09-29 Update
GB/T 242 Metal materials.Tube.Drift-expending test
GB/T 4336 Determination of multi-element content in carbon steel and medium and low alloy steel Spark discharge atomic emission spectrometry (conventional method) Amendment No. 1
GB/T 6394 Determination of estimating the average grain size of metal*， 2017-02-28 Update