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Basic data
| Standard ID | GB/T 24626-2025 (GB/T24626-2025) |
| Description (Translated English) | Explosion resistant equipment |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | K35 |
| Classification of International Standard | 29.260.20 |
| Word Count Estimation | 22,241 |
| Date of Issue | 2025-10-31 |
| Date of Implementation | 2026-05-01 |
| Older Standard (superseded by this standard) | GB/T 24626-2009 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB/T 24626-2025: Explosion resistant equipment
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 29.260.20
CCSK35
National Standards of the People's Republic of China
Replaces GB/T 24626-2009
Explosion-resistant equipment
Published on 2025-10-31
Implemented on May 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
Introduction IV
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.General Requirements for Explosion-Resistant Equipment 2
4.1 General Rules 2
4.2 Design Pressure 3
4.3 Design Temperature 3
4.4 Additional Load 3
4.5 Wall thickness tolerance 3
5.Explosion-resistant pressure equipment 3.
6.Explosion-resistant pressure shock equipment 3
6.1 General Rules 3
6.2 Design Procedure 3
6.3 Materials designed to withstand explosive pressure shock 4
6.4 Explosion-resistant pressure shock design 4
6.5 Design Quality Test Procedure for Resistance to Explosive Pressure Shock 7
6.6 Design and test documents for explosion-resistant pressure shock equipment 8
7.Quality documents for explosion-proof equipment 9.
7.1 Pressure Vessels 9
7.2 Dimensions 9
7.3 Materials 9
7.4 Welding 9
7.5 Report 10
8.Information on usage 10
8.1 Mark 10
8.2 Random File 10
Appendix A (Informative) Calculation of Design Pressure for a Single Vessel 11
Appendix B (Informative) Explosions in Pipelines and Interchange Containers 12
B.1 General Rule 12
B.2 Maximum Explosion Pressure Design 12
B.3 Pressure relief and inhibition 12
B.4 Explosion in the Pipeline 12
B.5 Using numerical models to estimate design pressure 13
Appendix C (Informative) Design of Explosion-Resistant Pressure Shock Equipment Using Finite Element Analysis (FEA) 14
C.1 Software 14
C.2 Verification 14
Appendix D (Informative) Example 15 of Constraining Stress Concentration
Reference 17
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.
This document replaces GB/T 24626-2009 "Explosion-resistant Equipment". Compared with GB/T 24626-2009, the main differences are structural adjustments and editorial changes.
Aside from the modifications, the main technical changes are as follows.
---A design procedure for explosion-resistant pressure shock equipment has been added (see 6.2);
---Requirements for materials resistant to explosive pressure shock have been added (see 6.3);
---The requirements for explosion-proof design have been changed (see 6.4.2, 6.2 in the.2009 edition);
---Special requirements have been added for bolted connection structures (see 6.4.4);
---Added a design quality test procedure for explosion pressure shock (see 6.5);
---Added design and testing documentation requirements for shock-resistant equipment (see 6.6).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Technical Committee on Standardization of Explosion-proof Electrical Equipment (SAC/TC9).
This document was drafted by. Nanyang Explosion-proof Electrical Research Institute Co., Ltd., Wuhan University of Technology, and China Coal Technology & Engineering Group Shenyang Research Institute Co., Ltd.
Company, Shanghai Coal Science & Technology Testing Technology Co., Ltd., Huarong Technology Co., Ltd., China Petroleum & Chemical Engineering Construction Co., Ltd., Nanyang Zhongtian Explosion-proof Electric
Gas Co., Ltd.
The main drafters of this document are. Wang Jun, Liu Qinghua, Zhang Hongkui, Chen Xianfeng, Zhou Jing, Li Bin, Wang Qiaoli, Ma Qiuju, Huang Chuyuan, Zhang Gang, and Lin Sen.
Zhang Peng, Wang Yingying, Zhu Guanghui, Guo Fei.
The release history of this document and the document it replaces is as follows.
---First published in.2009 as GB/T 24626-2009;
---This is the first revision.
Introduction
A complete set of explosion safety principles includes the following measures that manufacturers are required to take.
a) Prevent the formation of an explosive atmosphere;
b) Prevent ignition of explosive atmospheres;
c) If an explosion still occurs, immediately stop and/or limit the range of the explosion flame and pressure to a sufficiently safe level.
If the ignition hazard assessment of the equipment indicates that it does not meet the requirements of the equipment protection level, then the method described in c) above needs to be adopted.
Specified explosion-resistant equipment is one such method. Explosion-resistant is a term applied to enclosure structures, indicating their ability to withstand anticipated blast pressures.
Without cracking. The term "explosion-resistant" can be used for equipment, components, and protective systems.
Explosion-resistant equipment
1 Scope
This document specifies the general requirements for explosion-resistant equipment, the requirements for explosion-resistant pressure equipment, the requirements for explosion-resistant pressure impact equipment, and quality control requirements.
Requirements for components and usage information.
This document applies to equipment and devices where explosions are considered abnormal load conditions, deflagration may occur, and where explosion resistance is provided by metallic materials.
combination.
The atmospheric conditions applicable to this document are. pressure range of 80kPa to 110kPa and temperature range of -20℃ to 60℃.
Note. This document may also be helpful for the design, manufacture, testing, and marking of equipment used in environments outside the scope of the above-mentioned scope, provided that such equipment does not pose a risk to...
The corresponding standard requirements.
This document does not apply to equipment and equipment combinations that may detonate, equipment designed with explosion-proof enclosures, or offshore facilities.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 228.1 Metallic materials – Tensile testing – Part 1.Test method at room temperature
GB/T 2900.35 Electrical Engineering Terminology. Explosive Atmospheres
GB/T 9445 Qualification and Certification of Nondestructive Testing Personnel
GB/T 18253-2018 Types of Inspection Documents for Steel and Steel Products
3 Terms and Definitions
The terms and definitions defined in GB/T 2900.35 and the following terms and definitions apply to this document.
3.1
Explosion
Violent oxidation or decomposition reactions that lead to increased temperature and/or pressure.
Note. The "explosion" here mainly refers to a "chemical explosion".
3.2
deflagration
An explosion that propagates at subsonic speeds.
3.3
Detonation
An explosion that propagates at supersonic speeds and has shock wave characteristics.
3.4
Explosion resistant
Containers and equipment are designed to withstand explosive pressure or explosive pressure shocks.
Note. Explosion-resistant equipment has this characteristic.
...
