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GB/T 46082.1-2025: Safety devices for gas welding equipment - Part 1: Flame arrestor
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Safety devices for gas welding equipment - Part 1: Flame arrestor
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Basic data
| Standard ID | GB/T 46082.1-2025 (GB/T46082.1-2025) |
| Description (Translated English) | Safety devices for gas welding equipment - Part 1: Flame arrestor |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | J64 |
| Classification of International Standard | 25.160.30 |
| Word Count Estimation | 22,226 |
| Date of Issue | 2025-08-29 |
| Date of Implementation | 2026-03-01 |
| Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 46082.1-2025: Safety devices for gas welding equipment - Part 1: Flame arrestor
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT46082.1-2025
ICS 25.160.30
CCSJ64
National Standard of the People's Republic of China
Safety devices for gas welding equipment - Part 1.Flame arresters
[ISO 5175-1.2017,Gasweldingequipment-Safetydevices-
Released on August 29, 2025
Implementation on March 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Design and Materials 3
5 Technical Requirements 4
6 Test methods 6
7 Factory test 9
8 Instructions 9
9 Logo 10
Appendix A (informative) Structure numbering of this document compared with ISO 5175-1.2017 11
Appendix B (Informative) Technical differences between this document and ISO 5175-1.2017 and their causes 13
Appendix C (Informative) Third Party Testing 14
Appendix D (Informative) Factory Test 15
Appendix E (Informative) Flow Characteristics 16
Appendix F (Informative) Gas Marking 17
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is Part 1 of GB/T 46082 "Safety devices for gas welding equipment". GB/T 46082 has been published in the following parts.
--- Part 1.Flame arresters;
--- Part 2.Other devices.
This document is modified to adopt ISO 5175-1.2017 "Safety devices for gas welding equipment — Part 1.Devices with flame arresters".
Compared with ISO 5175-1.2017, this document has many structural adjustments. The structural number comparison table between the two documents is attached.
Record A.
This document has many technical differences compared to ISO 5175-1.2017.
A list of these technical differences and their reasons is given in Appendix B.
The following editorial changes have been made to this document.
--- Change the name of the standard to "Safety devices for gas welding equipment Part 1.Flame arresters";
--- Added unit conversion content and converted some gas pressure units into MPa;
---Change "safety device" in the document to "flame arrester";
--- Adjust the clause numbers of the technical requirements in Table 1 so that they correspond to the clause numbers of the test methods in accordance with the test sequence;
--- Added "Appendix A Structure numbering of this document compared with ISO 5175-1.2017";
--- Added "Appendix B Technical differences between this document and ISO 5175-1.2017 and their reasons".
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed and coordinated by the National Technical Committee for Standardization of Welding and Related Processes (SAC/TC55).
This document was drafted by. Ningbo Longxing Welding Technology Co., Ltd., China Machinery Engineering Corporation Harbin Welding Research Institute Co., Ltd.
Company, Hebei Vocational University of Science and Technology, Changzhou Junheng Welding Equipment Co., Ltd., Ningbo Jiangbei Xingda Welding and Cutting Pressure Reducer Instrument Factory, Ningbo
Jinding Industry and Trade Co., Ltd., Dongfang Electric Corporation Dongfang Steam Turbine Co., Ltd., Shanghai Nuclear Engineering Research and Design Institute Co., Ltd., Qingdao Guo
Sheng Welding and Cutting Equipment Co., Ltd., Ningbo Yinzhou Yongsheng Tool Manufacturing Co., Ltd., Beijing Jingye Technology Co., Ltd., China Coal Beijing Coal Mining Machinery
Limited Liability Company, Shandong Huaming Welding and Cutting Equipment Co., Ltd., Beijing Aerospace Petrochemical Technology Equipment Engineering Co., Ltd., Beijing Shougang Electromechanical Co., Ltd.
Company, Jiangsu Bafang Safety Equipment Co., Ltd., Qingdao Zhendeheng Welding and Cutting Tools Co., Ltd., Hebei Chuangli Electromechanical Technology Co., Ltd., Tongling Xue
Institute, Shaanxi Huaqin New Energy Technology Co., Ltd.
The main drafters of this document are. Zhao Songbai, Chen Yi, Li Lei, Ma Hui, Gao Yunfang, Gong Guodong, Zhu Chengwei, Li Zhuren, Xu Jian, Huang Yifeng, Xu Guozun,
Wang Jianping, Wang Yong, Liu Guozhu, Liu Xiaoqing, Ding Daijie, Ding Yingren, Zhou Decheng, Liu Lili, Qi Zhende, Li Xu, Pang Yuanlei, Wang Songlin, Lan Tongjun,
Wang Zhixin and Han Ying.
introduction
GB/T 46082 "Safety devices for gas welding equipment" is the product standard for safety devices for gas welding equipment, which establishes the safety devices for gas welding equipment.
Technical requirements and test methods for equipment.
GB/T 46082 is intended to consist of the following parts.
--- Part 1.Flame arresters. The purpose is to standardize the design and materials, technical requirements and test methods of flame arresters.
--- Part 2.Other devices. The purpose is to standardize the design and materials, technical requirements,
Test method.
--- Part 3.Low-pressure acetylene decomposition blocker. The purpose is to standardize the technology of low-pressure acetylene decomposition blocker below 0.15MPa
Requirements and test methods.
This document is intended to address the functional reliability and stability of flame arrester safety devices for gas welding equipment during design, production and application.
Provide a basis for the safe application of gas welding process.
Safety devices for gas welding equipment - Part 1.Flame arresters
1 Scope
This document specifies the terms and definitions, design and materials,
Technical requirements, test methods, factory tests, instructions, and markings. Flame arresters are used in gas storage tanks, confluence systems, or pressure reducers in gas circuit systems.
downstream outlet of the welding torch and upstream inlet of the welding torch.
This document does not specify the specific installation location of the flame arrester in the gas system.
This document does not apply to other safety devices without flame arresters specified in GB/T 46082.2.
This document does not apply to premixed gas piping systems of oxygen and fuel gas or air and fuel gas. For example, gas mixers or water electrolysis hydrogen
Gas line downstream of the oxygen mixed gas generator.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 3375 Welding Terminology
GB/T 5107 Hose connectors for welding, cutting and related process equipment for gas welding equipment
GB/T 40337 Gas welding and related process equipment - Air tightness (GB/T 40337-2021, ISO 9090.2019, MOD)
GB/T 40371 Gas welding equipment - Materials for welding, cutting and related process equipment (GB/T 40371-2021, ISO 9539.
2010, MOD)
GB/T 46082.2 Safety devices for gas welding equipment Part 2.Other devices (GB/T 46082.2-2025, ISO 5175-2.2017,
MOD)
GB/T 46073 Gas welding equipment Quick connectors with shut-off valves for welding, cutting and related process equipment (GB/T 46073-
2025, ISO 7289.2018, MOD)
3 Terms and Definitions
The terms and definitions defined in GB/T 3375 and the following apply to this document.
3.1
flame arrester flamearrestor
A device that prevents flames from spreading upstream in gas pipelines.
Example. Sintered powder metal fire stop tube has good thermal conductivity, high porosity, small pore size (large surface area), which can extinguish the flame.
Examples of typical flame arrester structures.
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