GB/T 18591-2026Welding - Measurement of preheating temperature, interpass temperature and preheat maintenance temperature (English PDF)
焊接 预热温度、道间温度及预热维持温度的测量
Also coversGB/T18591-2026 + GBT18591-2026
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 28, 2026
Implementation date
April 1, 2027
Scope
GB/T 18591-2026 is the English-translated version of 焊接 预热温度、道间温度及预热维持温度的测量.
Preheat and interpass temperatures strongly influence weld quality in many steels, and this standard concerns how to measure preheating temperature, interpass temperature and preheat maintenance temperature in welding. It is intended for welding engineers, supervisors, inspectors, fabricators and procedure qualification laboratories that must verify temperatures during production and keep documentation of them.
A reliable measuring practice supports compliance with welding procedure specifications and helps both contractors and clients to show that temperature requirements were met in the shop or on site. It replaces GB/T 18591-2001, a long interval, so organisations that still rely on the earlier edition may find that their measurement practice needs review. The standard adopts an international standard and is a recommended national standard (GB/T). It becomes effective on 1 April 2027.
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Document preview — GB/T 18591-2026
National Standard of the People's Republic of China
- ICS
- 25.160.10
- Classification
- J33
- Replacing
- GB/T 18591-2001
Issued by: State Administration for Market Regulation; Standardization Administration of China
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
Foreword
GB/T 18591-2026 is a recommended national standard (GB/T) of the People's Republic of China, issued on 28 September 2026 by the State Administration for Market Regulation and the Standardization Administration of China, with effect from 1 April 2027.
This edition replaces GB/T 18591-2001.
The document adopts an international standard (ISO or IEC).
It is under the responsibility of the Standardization Administration of China.
Classification: ICS 25.160.10; CCS J33.
1 Scope
Preheat and interpass temperatures strongly influence weld quality in many steels, and this standard concerns how to measure preheating temperature, interpass temperature and preheat maintenance temperature in welding. It is intended for welding engineers, supervisors, inspectors, fabricators and procedure qualification laboratories that must verify temperatures during production and keep documentation of them.
A reliable measuring practice supports compliance with welding procedure specifications and helps both contractors and clients to show that temperature requirements were met in the shop or on site. It replaces GB/T 18591-2001, a long interval, so organisations that still rely on the earlier edition may find that their measurement practice needs review. The standard adopts an international standard and is a recommended national standard (GB/T). It becomes effective on 1 April 2027.
Remaining clauses in the full document
- 2 Normative references
- 3 Terms and definitions
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Cited by
- GB/T 25774.1-2023Test methods for welding consumables - Part 1: Preparation of deposited metal test pieces and specimens for mechanical properties in steel, nickel and nickel alloys
- GB/T 41110-2021Tubular cored electrodes for gas shielded and non-gas shielded metal arc welding of nickel and nickel alloys
- GB/T 39279-2020Wire electrodes, wires, rods and deposits for gas shielded arc welding of creep-resisting steels
- GB/T 39280-2020Rods, wires and deposits for tungsten inert gas welding of non alloy and fine grain steels
- GB/T 39281-2020Wire electrodes, wires, rods and deposits for gas shielded arc welding of high strength steels
- GB/T 37400.3-2019Heavy machinery general technical specification - Part 3: Welded parts
Editions of GB/T 18591
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 18591-2026 | Welding - Measurement of preheating temperature, interpass temperature and preheat maintenance temperature | current edition | Current |
| GB/T 18591-2001 | Welding - Guidance on the masurement of preheating temperature, interpass temperature and preheat maintenance temperature | previous edition | In force until 1 April 2027 |
This page sells the current edition, GB/T 18591-2026. Earlier editions are listed for reference only.
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