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GB/T 33215-2025: Pressure relief devices for gas cylinders
Status: Valid GB/T 33215: Evolution and historical versions
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| GB/T 33215-2025 | English | 439 |
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Pressure relief devices for gas cylinders
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GB/T 33215-2025
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| GB/T 33215-2016 | English | 270 |
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Pressure relief devices for gas cylinders
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GB/T 33215-2016
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Basic data | Standard ID | GB/T 33215-2025 (GB/T33215-2025) | | Description (Translated English) | Pressure relief devices for gas cylinders | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J74 | | Classification of International Standard | 23.020.30 | | Word Count Estimation | 22,284 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 33215-2016 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB/T 33215-2025: Pressure relief devices for gas cylinders---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/GBT33215-2025
ICS 23.020.30
CCSJ74
National Standard of the People's Republic of China
Replaces GB/T 33215-2016
Gas cylinder safety pressure relief device
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
1 Scope 1
2 Normative references 1
3 Terms, definitions and symbols 1
4 Type and structure of safety pressure relief device 2
5 Requirements for the installation of safety pressure relief devices 3
6 Requirements for the selection of safety pressure relief devices 3
7 Basic requirements for safety pressure relief devices 4
8 Safety relief volume and rated displacement of safety pressure relief device 5
9 Requirements for determining the operating pressure and operating temperature of safety pressure relief devices 6
10 Marking, installation and maintenance of safety pressure relief devices 6
Appendix A (Informative) Gas Compressibility 8
Reference 15
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 replaces GB/T 33215-2016 "Safety Pressure Relief Devices for Gas Cylinders". Compared with GB/T 33215-2016, except for the structural adjustment and
In addition to editorial changes, the main technical changes are as follows.
a) Added the terms and definitions of “temperature-driven safety pressure relief device” and “relief area” (see 3.1.4 and 3.1.5);
b) Added the description of fusible alloy drive device (see 4.2);
c) Added the description of the glass bulb drive device (see 4.3);
d) The requirement that a safety pressure relief device should be installed has been modified (see 5.1, 5.1 of the.2016 edition);
e) The provision that safety pressure relief devices may not be installed has been modified (see 5.3, 5.2 of the.2016 edition);
f) Added the requirement that oxygen, nitrogen and inert gas cylinders not be equipped with safety pressure relief devices (see 5.5);
g) Changed the selection requirements for safety pressure relief devices for cryogenic insulated gas cylinders (see 6.4, 6.4 of the.2016 edition);
h) Added vehicle liquefied petroleum gas cylinders, vehicle liquefied dimethyl ether cylinders, vehicle compressed natural gas cylinders, vehicle compressed hydrogen cylinders,
Non-refillable welded cylinders, fiber-wound cylinders for breathing apparatus, seamless steel cylinder clusters for liquefied gas, and their
Selection requirements for safety pressure relief devices for other types of gas cylinders (see 6.5 to 6.11);
i) Added requirements for TPRD installed on compressed hydrogen cylinders for vehicles (see 7.1.6);
j) The location requirements for safety pressure relief devices for non-refillable welded cylinders have been changed (see 7.3.2, 7.3.3 of the.2016 edition);
k) Added acetylene cylinders, large-volume cylinders for tube trailers and tube bundle containers, cryogenic insulated cylinders, and metal hydride reversible storage
Requirements for the installation of safety pressure relief devices for gas cylinders used in hydrogen discharge systems (see 7.3.3, 7.3.4, 7.3.5, 7.3.7 and 7.3.8);
l) Added requirements for the installation of bursting discs in bursting disc-fusible alloy plug composite devices (see 7.3.9);
m) Added requirements for the installation of safety pressure relief devices for longer gas cylinders (see 7.3.10);
n) The provisions for the value of the discharge coefficient K have been changed (see 8.2, 8.2 of the.2016 edition);
o) Added provisions for calculating the rated displacement of safety relief devices for compressed hydrogen cylinders for vehicles (see 8.4);
p) Added the calculation of the rated displacement of the safety pressure relief device of the cylinders used in tube trailers and tube bundle containers containing compressed hydrogen
Provisions (see 8.5);
q) The requirements for the operating pressure of the bursting disc device have been changed (see 9.1, 9.1 of the.2016 edition);
r) Added the provisions on TPRD operating temperature (see 9.3);
s) Added requirements for marking of safety pressure relief devices (see 10.1).
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 Gas Cylinders (SAC/TC31).
This document was drafted by. Dalian Boiler and Pressure Vessel Inspection and Testing Institute Co., Ltd., China Special Equipment Inspection and Research Institute, Dalian
University of Science and Technology, Beijing Tianhai Industrial Co., Ltd., Sinoma Science & Technology (Suzhou) Co., Ltd., Zhejiang University, Dalian Duda Polytechnic Safety System Co., Ltd.
Co., Ltd., Shanghai Special Equipment Supervision and Inspection Technology Research Institute, and Shijiazhuang Enric Gas Machinery Co., Ltd.
The main drafters of this document are. Han Bing, Hu Jun, Li Bei, Huang Qianghua, Yan Xingqing, Wang Yanhui, Zhang Baoguo, Yang Minggao, Ma Xin, Li Qinan, Song Xuesi,
Yu Youliang, Sun Li, Wang Hongxia, and Zhu Yongjiang.
This document was first published in.2016 and this is the first revision.
Gas cylinder safety pressure relief device
1 Scope
This document specifies the types and structural types, installation requirements, selection requirements, basic requirements, safe discharge volume and
Calculation of rated displacement, determination of operating pressure or operating temperature, as well as marking, installation and maintenance.
This document is applicable to gas cylinders of various structures and containing various types of gases.
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 8337 Fusible alloy plug devices for gas cylinders
GB/T 13005 Gas Cylinder Terminology
GB/T 16918 Bursting disc safety devices for gas cylinders
GB/T 17268 Industrial non-refillable welded steel cylinders
GB 18428 Glass balls for automatic fire extinguishing systems
GB/T 42536 Combined valve for high-pressure hydrogen storage cylinders for vehicles
3 Terms, definitions and symbols
3.1 Terms and Definitions
The terms and definitions defined in GB/T 13005 and the following apply to this document.
3.1.1
Safety pressure relief device pressure relief device
In order to enable the gas cylinder to quickly and automatically exhaust and release pressure in an unexpected high temperature environment to protect the cylinder from explosion, it is installed on the gas cylinder.
pressure relief device.
NOTE. This includes pressure relief devices activated by temperature or pressure.
3.1.2
In order to prevent the gas pressure in the cylinder from continuing to rise after reaching the allowable pressure of the cylinder in an unexpectedly high temperature environment, the cylinder needs to be vented.
The minimum flow rate.
3.1.3
Rated capacity
Under the set discharge conditions, the gas mass that the safety relief device can discharge per unit time.
3.1.4
Temperature activated safety relief device.
Note. Includes fusible alloy plug device, fusible alloy drive device and glass bulb drive device.
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