GB 33147-2025 Liquefied dimethyl ether steel gas cylinders English, Anglais, Englisch, Inglés, えいご
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ICS
CCS H
National Standard of the People's Republic of China
GB 33147-2025
Replaces GB 33147-2016
Liquefied dimethyl ether steel gas cylinders
液化二甲醚钢瓶
Issue date: 2025-12-02 Implementation date: 2027-01-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Cylinder Types
5.1 Cylinder Model Designation Method
5.2 Cylinder Models and Parameters
5.3 Cylinder Structure Type
6 Materials
6.1 General Requirements
6.2 Chemical Composition
6.3 Mechanical Properties
7 Design
7.1 General Requirements
7.2 Calculation of Cylinder Body Wall Thickness
7.3 Attachments
8 Manufacturing
8.1 Heads
8.2 Shell
8.3 Assembly
8.4 Welding
8.5 Heat Treatment
9 Testing and Inspection Requirements
9.1 Radiographic Testing of Welds
9.2 Individual Testing
9.3 Batch Testing
9.4 Pressure Cycling Test
9.5 Repeat Testing
9.6 Type Testing
9.7 Factory Inspection and Type Testing Items
10 Marking, Coating, Packaging, Storage, Transport, and Factory Documentation
10.1 Marking
10.2 Coating
10.3 Packaging, Storage, and Transport
10.4 Public Website and Factory Documentation
Appendix A (Normative) Cylinder Stamped Marks
Appendix B (Informative) Format of Product Qualification Certificate
Appendix C (Informative) Format of Quality Certificate
1 Scope
This document specifies the types, materials, design, manufacturing, testing and inspection, marking, packaging, coating, storage and transport, design life, and factory documentation requirements for liquefied dimethyl ether steel cylinders (hereinafter referred to as "cylinders").
This document applies to welded steel cylinders used under normal ambient temperatures (-40℃ to 60℃), with a nominal working pressure of 1.6 MPa, a nominal volume not exceeding 150 L, and intended for repeated filling with liquefied dimethyl ether conforming to GB/T 25035.
2 Normative References
The following documents contain provisions that, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition corresponding to that date applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 150.3 Pressure Vessels — Part 3: Design
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 228.1 Metallic Materials — Tensile Testing — Part 1: Method of Test at Room Temperature
GB/T 1804 General Tolerances — Tolerances for Linear and Angular Dimensions Without Individual Tolerance Indications
GB/T 2651 Destructive Tests on Welds in Metallic Materials — Transverse Tensile Test
GB/T 2653 Bend Testing of Welded Joints
GB/T 6653 Steel Plates and Strips for Welded Gas Cylinders
GB/T 8335 Special Threads for Gas Cylinders
GB/T 9251 Hydraulic Pressure Test Method for Gas Cylinders
GB/T 9252 Pressure Cycling Test Method for Gas Cylinders
GB/T 12137 Leak Test Method for Gas Cylinders
GB/T 13005 Terminology for Gas Cylinders
GB/T 15385 Hydraulic Burst Test Method for Gas Cylinders
GB/T 17925 X-Ray Digital Imaging Inspection of Butt Welds in Gas Cylinders
GB/T 25035 Dimethyl Ether for Town Gas
GB 33146 Valves for Liquefied Dimethyl Ether Cylinders
GB/T 33209 Welding Procedure Qualification for Welded Gas Cylinders
GB/T 45439 Technical Specification for Traceability QR Code Application for Gas Cylinders and Gas Cylinder Valves
NB/T 47013.2 Nondestructive Testing of Pressure Equipment — Part 2: Radiographic Testing
TSG 23 Technical Supervision Regulation for Gas Cylinder Safety
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 13005 and the following apply.
3.1
allowable filling weight
The maximum allowable weight of liquefied dimethyl ether that can be filled.
3.2
cylinder unique number for traceability
A unique and traceable product serial number for the cylinder.
4 Symbols
The symbols listed in Table 1 apply to this document.
Table 1 Symbols and Descriptions
5 Cylinder Types
5.1 Cylinder Model Designation Method
The cylinder model designation method is as follows:
Note: The modification serial number indicates changes in the structure, wall thickness, or weight of a specific cylinder model within the DME series. If no changes have been made, the modification serial number may be omitted.
Example 1: DME26.2/15.0 denotes a vapor phase cylinder with a nominal volume of 26.2 L and an allowable filling weight of liquefied dimethyl ether of 15.0 kg.
Example 2: DME26.2//15.0 denotes a vapor phase cylinder with a nominal volume of 26.2 L, an allowable filling weight of liquefied dimethyl ether of 15.0 kg, and is the first modification.
Example 3: DME87//49.5 denotes a liquid phase cylinder with a nominal volume of 87 L and an allowable filling weight of liquefied dimethyl ether of 49.5 kg.
5.2 Cylinder Models and Parameters
Cylinders shall be designed and manufactured according to the model specifications in Table 2. Cylinders of models DME87/49.5 and DME87/液/49.5 shall not be installed indoors within the buildings they serve. Cylinders of other models shall not be installed indoors in densely populated places.
Table 2 Liquefied Dimethyl Ether Cylinder Models and Parameters
5.3 Cylinder Structure Type
The structural type of the cylinder is shown in Figure 1, where the protective guard consists of three pieces.
6 Materials
6.1 General Requirements
6.1.1 The material for the main parts of the cylinder (referring to pressure-bearing components such as the shell, heads, etc.) shall have good ductility and weldability; and shall be accompanied by the original material quality certificate or an electronic QR code version of the material quality certificate.
6.1.2 The cylinder manufacturer shall perform verification analysis of the chemical composition for the main materials by heat or melt number, and verify the mechanical properties by batch number. Materials verified as qualified shall bear material identification marks.
