GB/T 11640-2021Seamless aluminum alloy gas cylinders (English PDF)

Foreword

All technical contents of this part of GB 21551 are mandatory.

This standard was drafted in accordance with the rules given in GB/T 1.1-2009

"Directives for standardization – Part 1.Rules for the structure and drafting of

standards".

This standard replaces GB/T 11640-2001 "Seamless aluminum alloy gas

cylinders".

As compared with GB/T 11640-2001, the main changes of this standard are as

follows.

- In the provisions on the scope, DELETE the lower limit of nominal working

pressure and the lower limit of nominal capacity (SEE Chapter 1 of 2001

version);

- In the technical requirements, DELETE the 6351 aluminum alloy material

(SEE 5.1.1 of 2001 version);

- ADD the requirements for lead and bismuth elements in aluminum alloys

(SEE 5.1.1 and 5.1.6);

- MODIFY the requirement for the inner bottom radius (SEE 5.2.2.4);

- MODIFY the requirements for the collar design (SEE 5.2.5);

- MODIFY the requirements for the measured burst pressure (SEE 6.12);

- ADD Appendix B (normative) Anti-constant load crack test (SEE 5.1.2);

- ADD Appendix D (informative) Calculation method of thread shear stress

safety factor (SEE 5.2.3);

- ADD Appendix F (informative) Description and determination of aluminum

cylinder manufacture defects (SEE 6.2);

- ADD Appendix G (normative) Flattening test method (SEE 6.9).

This standard was proposed by the National Gas Cylinder Standardization

Technical Committee (SAC/TC 31).

The drafting organizations of this standard. Shenyang Gas Cylinder Safety

Technology Co., Ltd., Heilongjiang Huaan Machinery Co., Ltd., Shanghai High

Pressure Containers Co., Ltd.

1 Scope

This standard specifies the type and parameters, technical requirements, test

methods and qualification criteria, inspection rules and marking, coating,

packaging, transportation and storage requirements of seamless aluminum

alloy gas cylinders (hereinafter referred to as aluminum cylinders).

This standard applies to the design and manufacture of aluminum cylinders

which have a nominal working pressure of not more than 30 MPa, the nominal

volume of not more than 50 L, the use temperature is -40 °C ~ 60 °C, AND can

be re-filled with permanent gas or liquefied gas.

2 Normative references

The following documents are essential to the application of this document. For

the dated documents, only the versions with the dates indicated are applicable

to this document; for the undated documents, only the latest version (including

all the amendments) are applicable to this Standard.

GB/T 191 Packaging – Pictorial marking for handling of goods

GB/T 192 General purpose metric screw threads – Basic profile

GB/T 196 General purpose metric screw threads – Basic dimensions

GB/T 197 General purpose metric screw threads – Tolerances

GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1.Method of test

at room temperature

GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1.Test

method (scales A, B, C, D, E, F, G, H, K, N, T)

GB/T 231.1 Metallic materials - Brinell hardness test - Part 1.Test method

GB/T 232 Metallic materials – Bend test

GB/T 3191 Extrusion rods and bars of aluminum and aluminum alloy

GB/T 3246.1 Inspection method for structure of wrought aluminum and

aluminum alloy products – Part 1.Inspection method for microstructure

GB/T 3246.2 Inspection method for structure of wrought aluminum and

aluminum alloy products – Part 2.Inspection method for macrostructure

GB/T 3880.1 ~ 3880.3 Wrought aluminum and aluminum alloy plates,

sheets and strips for general engineering

4 Type and parameters

6 Test methods and qualification criteria