GB/T 42678-2023Hot-rolled steel sections for petroleum and natural gas engineering (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

1 Scope

This document specifies the ordering content, grade representation method, size, shape, weight, technical requirements, Test methods, inspection rules, packaging, marking and quality certificates.

This document is applicable to hot-rolled H-shaped steel, angle steel, etc. with flange (or edge) thickness not greater than 50mm for land and offshore oil and gas engineering Channel steel and other shaped steel (hereinafter referred to as "shaped steel").

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 222 Allowable deviations in chemical composition of finished steel products

GB/T 223.5 Determination of acid-soluble silicon and total silicon content in iron and steel Reduced silicomolybdate spectrophotometry

GB/T 223.9 Determination of aluminum content in steel and alloys Chromium Azure S spectrophotometry

GB/T 223.12 Methods for chemical analysis of steel and alloys - sodium carbonate separation-diphenylcarbazide photometric method for determination of chromium content

GB/T 223.14 Methods for chemical analysis of steel and alloys - Determination of vanadium content by tantalum reagent extraction photometry

GB/T 223.17 Methods for chemical analysis of steel and alloys - Determination of titanium content by diantipyrine methane photometry

GB/T 223.19 Chemical analysis method for steel and alloys - Determination of copper content by new cuproline-chloroform extraction photometry

GB/T 223.23 Determination of nickel content in steel and alloys by diacetyl oxime spectrophotometry

GB/T 223.26 Determination of molybdenum content in steel and alloys Thiocyanate spectrophotometry

GB/T 223.37 Determination of nitrogen content in steel and alloys by distillation and separation of indophenol blue spectrophotometry

GB/T 223.40 Determination of niobium content in steel and alloys by chlorosulfenol S spectrophotometry

GB/T 223.62 Methods for chemical analysis of steel and alloys - Determination of phosphorus content by butyl acetate extraction photometric method

GB/T 223.64 Determination of manganese content in steel and alloys by flame atomic absorption spectrometry

GB/T 223.72 Gravimetric method for determination of sulfur content in steel and alloys

GB/T 223.78 Methods for chemical analysis of steel and alloys - Curcumin direct photometric method for determination of boron content

GB/T 223.86 Determination of total carbon content of steel and alloys - Infrared absorption method after combustion in induction furnace

GB/T 228.1 Tensile testing of metallic materials Part 1: Room temperature test method

GB/T 229 Charpy pendulum impact test method for metal materials

GB/T 232 Bending test method for metal materials

GB/T 706 hot rolled steel

GB/T 2101 General provisions for acceptance, packaging, marking and quality certificates of section steel

GB/T 2975 Sampling location and sample preparation for mechanical property testing of steel and steel products

GB/T 4336 Determination of multi-element content in carbon steel and medium-low alloy steel Spark discharge atomic emission spectrometry (conventional method)

GB/T 8170 Numerical rounding rules and expression and determination of limit values

GB/T 11263 Hot-rolled H-shaped steel and split T-shaped steel

GB/T 20066 Methods for sampling and preparation of samples for determination of chemical composition of steel and iron