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GB/T 32566.1-2026: Welded stainless steel cylinders - Part 1: Test pressure 6 MPa and below
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GB/T 32566.1: Evolution and historical versions
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Welded stainless steel cylinders - Part 1: Test pressure 6 MPa and below
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Basic data | Standard ID | GB/T 32566.1-2026 (GB/T32566.1-2026) | | Description (Translated English) | Welded stainless steel cylinders - Part 1: Test pressure 6 MPa and below | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J74 | | Classification of International Standard | 23.020.30 | | Word Count Estimation | 46,468 | | Date of Issue | 2026-02-27 | | Date of Implementation | 2026-09-01 | | Older Standard (superseded by this standard) | GB/T 32566-2016 | | Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China | GB/T 32566.1-2026: Welded stainless steel cylinders - Part 1: Test pressure 6 MPa and below---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 23.020.30
CCSJ74
National Standards of the People's Republic of China
Replaces GB/T 32566-2016
Stainless steel welded gas cylinder
Part 1.Test pressure less than or equal to
6MPa gas cylinder
Published on 2026-02-27
Implemented on 2026-09-01
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
Introduction V
1.Scope 1
2 Normative References 1
3.Terms and Definitions 2
4.Symbols and Explanations 2
5 Materials and Heat Treatment 4
5.1 General Provisions 4
5.2 Material Category 4
5.3 Heat Treatment 4
5.4 Test Requirements 4
6 Design 4
6.1 General Requirements 4
6.2 Calculation of cylinder wall thickness 5
6.3 Convex head design 5
6.4 Minimum wall thickness requirement 6
6.5 Other Shaped Heads 7
6.6 Opening Design 7
7 Manufacturing and Process Requirements
7.1 General Requirements 7
7.2 Welding Process 7
7.3 Welded joints of pressure-bearing components 7
7.4 Non-pressure bearing accessories 7
7.5 Valve Protection 8
7.6 Bottle neck thread 8
7.7 Visual Inspection 8
8.Type testing 9.
8.1 General Requirements 9
8.2 Verification and Testing 9
8.3 Test Requirements 10
8.4 Type Test Certificate 10
9 Batch testing 10
9.1 General Requirements 10
9.2 Document 11
9.3 Tensile test 11
9.4 Bending Test 13
9.5 Macroscopic inspection of weld cross-section 14
9.6 Inspection and Verification 14
10.Inspect each item individually. 15.
10.1 Pressure Resistance Test 15
10.2 Hardness Test 15
10.3 Leakage Test 15
11 Requirements for unqualified test results 15
12 Marks 15
13 Product Certificate of Conformity and Batch Quality Certificate 16
Appendix A (Informative) A list of structural number comparisons between this document and ISO 18172-1.2007 17
Appendix B (Informative) A summary of the technical differences between this document and ISO 18172-1.2007 and the reasons thereof (Table 22)
Appendix C (Normative) Radiographic Inspection of Welds 26
C.1 General Requirements 26
C.2 Requirement 26
C.3 Defect Detection 27
Appendix D (Normative) Evaluation of Manufacturing Defects and Acceptance Standards for Visual Inspection of Steel Cylinders 28
D.1 Overview 28
D.2 General Requirements 28
D.3 Manufacturing Defects 28
D.4 29 Substandard Steel Cylinders
Appendix E (Informative) Templates for Certificates of Conformity and Batch Quality Certificates 30
E.1 Certificate of Conformity 30
E.2 Batch Quality Certificate 33
References 36
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 is Part 1 of GB/T 32566 "Stainless Steel Welded Gas Cylinders". GB/T 32566 has already published the following parts.
---Part 1.Gas cylinders with a test pressure less than or equal to 6 MPa;
---Part 2.Gas cylinders with a test pressure greater than 6 MPa.
This document replaces GB/T 32566-2016 "Stainless Steel Welded Gas Cylinders". Compared with GB/T 32566-2016, the main differences are in structural adjustments and rewriting.
Aside from the logical changes, the main technical changes are as follows.
a) The scope has been changed (see Chapter 1, Chapter 1 of the.2016 edition);
b) Added terms and definitions for "yield strength", "solution treatment", "cold working strengthening", "strain strengthening", "batch", and "minimum guaranteed thickness".
(See 3.1~3.5, 3.7);
c) The permitted materials have been expanded (see Chapter 5);
d) The wall thickness calculation formula has been modified (see Chapter 6, Chapter 5 of the.2016 edition);
e) The permitted manufacturing processes have been expanded (see Chapter 7);
f) The requirements for picking up parts during batch inspection have been changed (see Chapter 9, 6.14 and 8.3 of the.2016 edition);
g) Some manufacturing tolerance requirements have been removed (see 6.6~6.9, 6.12 in the.2016 edition);
h) The type testing coverage has been changed (see 8.1, 9.3 in the.2016 edition);
i) The non-destructive testing ratio requirement has been changed (see C.2, 6.4.2 of the.2016 version);
j) The requirement for color marking of stainless steel welded gas cylinders has been removed (see Appendix A of the.2016 edition).
This document is modified to adopt ISO 18172-1.2007 "Refillable stainless steel welded gas cylinders – Part 1.Test pressure less than..."
Or equal to 6 MPa.
This document has undergone significant structural adjustments compared to ISO 18172-1.2007.A comparison of the structural numbering changes between the two documents is provided below.
See Appendix A for the table.
This document differs significantly from ISO 18172-1.2007.The relevant clauses are indicated in the margins using vertical markers.
Straight lines (|) are marked. A summary of these technical differences and their reasons can be found in Appendix B.
The following editorial changes have been made to this document.
---Some clauses have had the requirements within parentheses in ISO 18172-1.2007 changed to the requirements within the clauses themselves, i.e., the parentheses have been removed;
---Some clauses have removed the word "any" from ISO 18172-1.2007;
---The second paragraph of Chapter 1 of ISO 18172-1.2007 has been deleted, as its content is redundant with the preceding text of Chapter 1 and section 7.4.4.
---The term "stress reduction factor" has been changed to "weld joint factor";
---Added a note stating "Cylinder material and gas compatibility refer to ISO 11114-1" (see 5.1.2);
---The redundant requirement regarding material quality certificates in section 4.3.3 of ISO 18172-1.2007 has been removed (see section 5.3.3);
---The pressure unit has been uniformly changed to MPa, and the corresponding wall thickness calculation formula has been changed (see 6.2);
---Note 6.7 in ISO 18172-1.2007 has been deleted;
---The term "new design experiment" is now referred to as "type experiment" (see Chapter 8);
---The redundant requirement in ISO 18172-1.2007 that "test bottles must have an intact stamp" in sections 7.3.1.1 and 7.3.2.1 has been removed;
---ISO 18172-1.2007 does not indicate the thickness represented by 't' in Figure 7, but it is indicated in Figure 8.This document will explain the symbol 't'.
The reference illustration in the Ming Dynasty has been changed to Figure 8 (see Table 1);
---The redundant description of test items in section 8.3.1 of ISO 18172-1.2007 has been removed;
---The redundant description of the specimen sampling location for intergranular corrosion testing in ISO 18172-1.2007 has been removed (see 8.3.3);
---The reference to the informative appendix on type testing certificates in section 7.4 of ISO 18172-1.2007 has been deleted (see section 8.4);
---The reference clauses in explanatory notes 3 of Figure 5 in ISO 18172-1.2007 and the corrosion test in explanatory notes 6 of explanatory notes 5 have been amended.
Incorrect description of the number of test samples (see Figure 5);
---The symbol for the fillet dimension of the curved specimen edge in Figure 7 of ISO 18172-1.2007 has been changed.
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 and is under the jurisdiction of the National Technical Committee on Standardization of Gas Cylinders (SAC/TC31).
This document was drafted by. Jiangsu Tianhai Special Equipment Co., Ltd., and Shanghai Special Equipment Supervision and Inspection Technology Research Institute Co., Ltd.
Zhejiang Taote Container Technology Co., Ltd., Jiangsu Rongdao Semiconductor Technology Co., Ltd., Yantai Special Equipment Inspection and Research Institute, Ningbo Jin
Dunmeike Gas Cylinder Intelligent Manufacturing Co., Ltd., Jiangsu Minsheng Heavy Industry Co., Ltd., Jiangsu University of Science and Technology, Shandong University, Beijing Institute of Petrochemical Technology, Beijing
Tianhai Industrial Co., Ltd., Jinan Special Equipment Inspection and Research Institute, Henan Provincial Boiler and Pressure Vessel Inspection Technology Research Institute, Qingdao Special Equipment Inspection and Research Institute
Special Equipment Inspection and Research Institute, Chongqing Special Equipment Inspection and Research Institute, Qujing Inspection and Testing Certification Institute, Dalian Boiler and Pressure Vessel Inspection and Testing Institute
Research Institute Co., Ltd.
The main drafters of this document are. Dai Dewei, Xu Weipu, Shi Tianxiang, Lu Xiang, Chen Deyuan, Yan Weihua, Wang Jingxiong, Ni Fei, Hu Qingxian, and Zhu Hongbo.
Ye Yanchi, Zhang Baoguo, Wang Juan, Zhang Hua, Wang Yanhui, Li Anhua, Cui Weidong, Du Liming, Li Xiuquan, Jin Yunhai, Tao Siwei.
This document was first published in.2016, and this is its first revision.
Introduction
In order to adapt to the rapid development of the market economy, implement the grand goals of the "Belt and Road" initiative, expand international trade, and improve my country's...
Regarding product quality and technical level, the GB/T 32566 series standards have been revised and adopted in accordance with the ISO 18172 series standards.
This was developed to align with international standards. By converting ISO standards, various low-pressure and high-pressure stainless steel products can be developed more rapidly.
Welding gas cylinders contributes to my country's industrial development.
GB/T 32566 "Stainless Steel Welded Gas Cylinders" is proposed to consist of the following two parts.
---Part 1.Gas cylinders with a test pressure less than or equal to 6 MPa. The purpose is to provide specifications for gas cylinders with a test pressure less than or equal to 6 MPa.
Requirements for the design, manufacture and inspection of stainless steel welded gas cylinders.
---Part 2.Gas Cylinders with Test Pressures Greater Than 6 MPa. The purpose is to provide specifications for stainless steel welded gas cylinders with test pressures greater than 6 MPa.
Requirements for design, manufacturing, and inspection.
The technical specifications in this document include the technical requirements that must be followed in the production process of stainless steel welded gas cylinders (i.e., design, manufacturing, and inspection).
This document is neither necessary nor possible to include all the technical details of the production of stainless steel welded gas cylinders within its applicable scope.
Stainless steel welded gas cylinder
Part 1.Test pressure less than or equal to
6MPa gas cylinder
1 Scope
This document specifies the basic requirements for materials, design, production process, manufacturing procedures, and testing of stainless steel welded gas cylinders (hereinafter referred to as "cylinders").
This requirement.
This document applies to ambient temperatures ranging from -40℃ to 60℃, hydrostatic test pressures less than or equal to 6MPa (gauge pressure), and nominal volumes of [missing information].
Steel cylinders ranging from 0.5L to 500L that can be refilled with compressed gas, liquefied gas, and dissolved gas.
For steel cylinders filled with acetylene, GB/T 11638 specifies the requirements for the cylinder body and porous packing.
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 192 Standard Thread Profile
GB/T 196 Basic Dimensions of Ordinary Threads
GB/T 197 Tolerances for Standard Threads
GB/T 228.1 Metallic materials—Tensive testing—Part 1.Tests at room temperature (GB/T 228.1-2021, ISO 6892-1)
2019, MOD)
GB/T 231.1 Metallic materials – Brinell hardness test – Part 1.Test methods (GB/T 231.1-2018, ISO 6506-1)
2014, MOD)
GB/T 232 Metallic materials - Bending test method (GB/T 232-2024, ISO 7438.2020, MOD)
GB/T 713.7 Steel plates and strips for pressure equipment - Part 7.Stainless steel and heat-resistant steel
GB/T 4334 Corrosion of metals and alloys - Test methods for intergranular corrosion of austenitic and ferritic-austenitic (duplex) stainless steel
(GB/T 4334-2020, ISO 3651-1.1998, ISO 3651-2.1998, MOD)
GB/T 5100 Steel Welded Gas Cylinders
GB/T 8335 Gas Cylinder Threads
GB/T 9251 Method for hydrostatic testing of gas cylinders
GB/T 9252 Pressure Cyclic Test Method for Gas Cylinders
GB/T 12137 Test Method for Air Tightness of Gas Cylinders
GB/T 13005 Gas Cylinder Terminology
GB/T 14976 Stainless steel seamless pipes for conveying fluids
GB/T 15385 Test method for hydraulic bursting of gas cylinders
GB/T 17925 X-ray digital imaging inspection of butt welds on gas cylinders
GB/T 19418 Guide to the Classification of Defects in Arc Welded Joints of Steel (GB/T 19418-2003, ISO 5817.1992, IDT)
GB/T 33209 Welding Procedure Qualification for Welded Gas Cylinders
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