This standard specifies the classification and designation method, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marks and quality certificates of wide and thick steel plates for oil and natural gas pipelines. This standard applies to wide and thick steel plates (hereinafter referred to as steel plates) with a thickness of 6 mm to 50 mm for oil and natural gas pipelines produced in accordance with ISO 3183, GB/T 9711 and API Spec 5L. Wide and thick steel plates for other fluid transport welded pipes can also be used. Refer to this standard.
GB/T 21237-2018 Referenced Document
GB/T 10561 Standard grading chart microscopic examination method for determination of non-metallic inclusion content in steel*， 2023-05-23 Update
GB/T 13299 Determination of free cementite, pearlite and Widmanstaten structure in steel*， 2022-07-11 Update
GB/T 14977 General requirement for surface condition of hot-rolled steel plates
GB/T 17505 Steel and steel products.General technical delivery requirements
GB/T 20066 Steel and iron.Sampling and preparation of samples for the determination of chemical composition
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method)
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 223.16 Methods for chemical analysis of iron,steel and alloy--The chromotropic acid photometric method for the determination of titanium content
GB/T 223.19 Methods for chemical analysis of iron,steel and alloy--The neocuproine-chloroform extraction photometric method for the determination of copper content
GB/T 223.26 Iron,steel and alloy.Determination of molybdenum content.The thiocyanate spectrophotometric method
GB/T 223.40 Iron, steel and alloy Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.5 Steel and iron.Determination of acid-soluble silicon and total silicon content.Reduced molybdosilicate spectrophotometric method
GB/T 223.54 Iron, steel and alloy—Determination of nickel content—Flame atomic absorption spectrometric method*， 2022-07-11 Update
GB/T 223.58 Methods for chemical analysis of iron,steel and alloy--The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese 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 223.68 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 223.76 Methods for chemical analysis iron,steel and alloy.The flame atomic absorption spertrometric method for the determination of vanadium content
GB/T 223.78 Methods for chemical analysis of iron,steel and alloy-Curcumin spectrophotometric method for the determination of boron content
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 232 Metallic materials - Bend test methods*， 2024-03-15 Update
GB/T 247 General rule of package,mark and certification for steel plates(sheets)and strips
GB/T 2975 Steel and steel products.Location and preparation of samples and test pieces for mechanical testing
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