Valid

GB/T 31032-2023Welding and acceptance standard for steel pipings and pipelines (English PDF)

钢质管道焊接及验收

Preview PDF

This is a limited preview

Buy now to download the full PDF (87 pages)

Need quotation for your management?

Get a formal quotation for GB/T 31032-2023 in 30 minutes.

Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 28, 2023

Implementation date

April 1, 2024

Scope

GB/T 31032-2023 is the English-translated version of 钢质管道焊接及验收.

GB/T 31032-2023 is the Chinese national standard covering welding and acceptance standard for steel pipings and pipelines. Issued on 28 December 2023, it has been in force since 1 April 2024, replacing GB/T 31032-2014.

Found what you need?

Document preview — GB/T 31032-2023

National Standard of the People's Republic of China

ICS: 25.160.40
Classification: P 94
Replacing: GB/T 31032-2014

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviations
5 Basic requirements
6 Welding procedure qualification
7 Welder qualification
8 Field weld
9 Weld inspection and personnel qualification
10 Nondestructive testing acceptance
11 Removal and repair of defects
12 Nondestructive testing methods
13 Mechanized welding with filling metal

Foreword

1 Scope

This document specifies the arc welding process for butt joints, corner joints and socket joints of carbon steel and low alloy steel pipes and pipe fittings of long-distance pipings and pipelines and gathering pipings and pipelines with crude oil, refined oil, natural gas, carbon dioxide and nitrogen.

The welding methods to which this document applies are electrode arc welding, submerged arc welding, fused and non-fused gas shielded arc welding, flux-cored wire arc welding, plasma arc welding or a combination thereof. The welding methods are manual welding, semi-automatic welding, mechanized welding, automatic welding or a combination thereof. The welding position is position welding, roll welding or a combination thereof.

This document also specifies the acceptance requirements for radiographic inspection, X-ray digital imaging inspection, X-ray computer-aided imaging inspection, magnetic particle inspection, penetrant inspection, ultrasonic inspection, fully automatic ultrasonic inspection, phased array ultrasonic inspection and the use of destructive tests for welded joints.

This document is applicable to the welding of newly built, renovated, expanded and in-service pipings and pipelines.

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 dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 226 Test method for macrostructure and defect of steel by etching

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 2653 Bend test methods on welded joints

GB/T 3091 Welded steel pipes for low pressure liquid delivery

GB/T 4157 Laboratory testing of metals for resistance to sulfide stress cracking and stress corrosion cracking in H2S environment

GB/T 4340 (All parts) Metallic materials - Vickers hardness test

GB/T 5117 Covered electrodes for manual metal arc welding of non-alloy and fine grain steels

GB/T 5293 Solid wire electrodes, tubular cored electrodes and electrode/flux combinations for submerged arc welding of non alloy and fine grain steels - Classification

GB/T 5310 Seamless steel tubes and pipes for high pressure boiler

GB/T 6479 Seamless steel tubes for high-pressure for chemical fertilizer equipment

GB/T 8110 Wire electrodes and weld deposits for gas shielded metal arc welding of non alloy and fine grain steels

GB/T 8163 Seamless steel pipes for liquid service

GB/T 8650 Evaluation of pipeline and pressure vessel steels for resistance to hydrogen-induced cracking

GB/T 9711 Petroleum and natural gas industries - Steel pipe for pipeline transportation systems

GB/T 10045 Tubular cored electrodes for non-alloy and fine grain steels

GB/T 13401 Steel buttwelding pipe fittings - Technical specification

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1 preliminary welding procedure specification

welding procedure document prepared for welding procedure qualification

3.2 welding procedure qualification record

report that records the details of welding procedure evaluation factors, verification tests and inspection results of welding joints, and qualifies the proposed preliminary welding procedure specification

4 Abbreviations

For the purposes of this document, the following abbreviations apply.

CE: Carbon Equivalent

CTOD: Crack Tip Open Displacement

Contents of GB/T 31032-2023 Foreword i

Remaining clauses in the full document

5 Basic requirements
5.1 Welding equipment and instrument
5.2 Materials
5.3 Personnel
5.4 Welding procedures
5.5 Welding environment
6 Welding procedure qualification
6.1 General requirements
6.2 Records
6.3 Procedure specification
6.4 Basic elements of welding procedure qualification
6.5 Welding of test pipe joints - butt welding
6.6 Testing of welded joints - butt welding
6.7 Welding of test pipe joints - fillet welding
6.8 Testing of welded joints - fillet welding
7 Welder qualification
7.1 General requirements
7.2 Qualification examination
7.3 Single-item qualification
7.4 All-item qualification
7.5 Appearance inspection of welding joints for exams
7.6 Collapse test
7.8 Make-up exam
7.9 Records
8 Field weld
8.1 General requirements
8.2 Pipe orifice assembling
8.3 Requirements for use of aligners
8.4 Groove
8.5 Climatic conditions
8.6 Working space
8.7 Interlayer cleaning
8.8 Welding
8.9 Marking of weld joint
9 Weld inspection and personnel qualification
9.1 Inspection contents
9.2 Inspection methods
9.3 Requirements for nondestructive testing personnel
10 Nondestructive testing acceptance
10.2 Magnetic particle testing
10.3 Penetrant testing
10.5 Visual inspection of undercut edges
10.6 Visual inspection of internal concavity
11 Removal and repair of defects
11.1 Crack
11.2 Non-crack defects
11.3 Repair requirements
11.4 Repair welding procedure specification
11.5 Basic elements of repair welding procedure qualification
11.6 Welding of butt welded test pipe joints
11.7 Testing of butt welded joints
11.8 Repair welder qualification examination
11.9 Acceptance standard
12 Nondestructive testing methods
12.1 Radiographic testing
12.2 X-ray digital imaging testing
12.3 X-ray computed radiographic testing
12.4 Magnetic particle testing
12.5 Penetrant testing
12.6 Ultrasonic testing
12.7 Phased array ultrasonic testing
12.8 Fully automatic ultrasonic testing
13 Mechanized welding with filling metal
13.1 Applicable welding methods
13.2 Welding procedure qualification
13.3 Records
13.4 Welding procedure specification (WPS)
13.6 Welding of butt welded test pipe joints
13.7 Qualification examination for mechanized welding welders
13.8 Records of qualified mechanized welding operators
13.9 Inspection and testing of field welds
13.10 Acceptance standard for nondestructive testing
13.11 Repair and removal of defects
13.12 Radiographic testing
13.13 Ultrasonic testing

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 87 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 4340 · GB/T 6479 · GB/T 29168

Cited by

Editions of GB/T 31032

Edition	Title	Revision	Status
GB/T 31032-2023	Welding and acceptance standard for steel pipings and pipelines	current edition	Current

This page sells the current edition, GB/T 31032-2023. Earlier editions are listed for reference only.

How to Download GB/T 31032-2023

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.