Detail of GB/T 42678-2023

Introduction of GB/T 42678-2023

Hot-rolled steel sections for petroleum and natural gas engineering 1 Scope This document specifies the order contents, designation expression method, dimensions, shapes and weights as well as technical requirements, test methods, inspection rules, packaging, marking and quality certificate of hot-rolled steel sections for petroleum and natural gas engineering. This document is applicable to hot-rolled H section steel, angle steel, channel steel and other steel sections (hereinafter referred to as "section steels") with flange (or edge) thickness not greater than 50mm for onshore and offshore petroleum and natural gas engineering. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method GB/T 223.9 Iron, steel and alloy - Determination of aluminium content - Chrome azurol S photometric 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 223.14 Methods for chemical analysis of iron, steel and alloy - The N-benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content GB/T 223.17 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane 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 223.23 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 223.37 Iron, steel and alloy - Determination of nitrogen content - Indophenol blue spectrophotometric method after distillation separation GB/T 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method GB/T 223.62 Methods for chemical analysis of iron, steel and alloy - The butyl acetate extraction photometric method for the determination of phosphorus content GB/T 223.64 Iron, steel and alloy - Determination of manganese content - Flame atomic absorption spectrometric method GB/T 223.72 Iron, steel and alloy - Determination of sulfur content - Gravimetric method GB/T 223.78 Methods for chemical analysis of iron, steel and alloy - Curcumin spectrophotometric method for the determination of boron content GB/T 223.86 Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature GB/T 229 Metallic materials - Charpy pendulum impact test method GB/T 232 Metallic materials - Bend test GB/T 706 Hot rolled section steel GB/T 2101 General requirement of acceptance, packaging, marking and certification for section steel GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method) GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values GB/T 11263 Hot rolled H and cut T section steel 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 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (routine method) GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method GB/T 41749 General requirements for surface condition of hot-rolled sections GB/T 42899 Test method for weldability of ocean engineering structural steel YB/T 4811 Ultrasonic testing of hot rolled H section steel YB/T 4932 Magnetic testing method for hot rolled section steel 3 Terms and definitions No terms and definitions are listed in this document. 4 Order contents Contracts or orders made based on this document shall include but not be limited to the following contents: a) product name; b) serial number of this document; c) designation; d) model and specification; e) delivery length; f) weight and quantity; g) delivery state; h) other special requirements proposed by the purchaser, such as special specification requirements and special surface quality requirements.

Contents of GB/T 42678-2023

Contents Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Order contents 5 Designation expression method 6 Dimensions, shapes and weights 7 Technical requirements 8 Test methods 9 Inspection rules 10 Packaging, marking and quality certificate