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GB 11640-2011 English PDF (GB11640-2011)

GB 11640-2011 English PDF (GB11640-2011)

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GB 11640-2011: [GB/T 11640-2011] Seamless aluminum alloy gas cylinders [Renamed to GB/T 11640-2011]

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.
GB 11640-2011
GB
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 23.020.30
J 74
Replacing GB/T 11640-2001
Seamless aluminum alloy gas cylinders
ISSUED ON. DECEMBER 30, 2011
IMPLEMENTED ON. DECEMBER 01, 2012
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
3. No action is required - Full-copy of this standard will be automatically and immediately delivered to your EMAIL address in 0~60 minutes.
Table of contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions, symbols ... 6
4 Type and parameters ... 7
5 Technical requirements ... 9
6 Test methods and qualification criteria ... 13
7 Inspection rules ... 16
8 Marking, coating, packaging, transportation and storage ... 19
9 Product certificate and batch inspection quality certificate ... 20
Appendix A (Normative) Corrosion test ... 22
Appendix B (Normative) Anti-constant load crack test ... 31
Appendix C (Informative) Gases preferable to be filled in aluminum cylinder 37 Appendix D (Informative) Calculation method of stress safety factor for thread shear stress ... 38
Appendix E (Normative) Valve installation torque of aluminum cylinder ... 41 Appendix F (Informative) Description and judgment of defects in aluminum cylinder manufacturing ... 42
Appendix G (Normative) Flattening test method ... 48
Appendix H (Informative) Seamless aluminum alloy cylinder batch inspection quality certificate ... 51
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.
The main drafters of this standard. Jiang Jiang, Liu Shouzheng, Deng Hong, Wang Shuxian, Chen Weiming.
Seamless aluminum alloy gas cylinders
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
3.2 symbols
The following symbols apply to this document.
A. elongation at fracture, %;
C. Thickness from bottom grounding point to the inner wall, mm;
d. Circumferential tear length of rupture opening, mm;
D0. Nominal outer diameter of cylinder, mm;
Df. Indenter diameter of bending test, mm;
H. External height of spherical part (cylinder shoulder and bottom), mm; L. Length of cylinder part, mm;
n. The ratio of the indenter diameter to the average thickness of sample; ph. Pressure of hydraulic test, MPa;
pb. Pressure of hydraulic blasting test, MPa;
r. Inner bottom corner radius, mm;
r1. Inner bottom radius, mm;
R. Indenter cutting edge radius of flattening test, mm;
Rm. Measured tensile strength, MPa;
Rp0.2. Specified non-proportional extension strength, MPa;
S. Designed wall thickness of cylinder, mm;
Sa0. Measured average wall thickness of cylinder, mm;
S1. Cylinder bottom center wall thickness, mm;
T. Indenter spacing of flattening test, mm.
4 Type and parameters
4.1 Type
The typical structure of aluminum cylinders shall generally comply with the type as shown in Figure 1.
5.1.5 The cylinder material must have the product quality certificate from the material manufacturing unit, AND it can only be used after passing the
re-testing by the aluminum cylinder manufacturing unit.
5.1.6 The chemical composition shall be re-tested in accordance with the material furnace number. The Pb and Bi contents can be confirmed in
accordance with the data of the product quality certificate.
5.1.7 The casting ingot shall be subjected to ultrasonic test in accordance with ??2 mm equivalent flat bottom hole, AND the inspection method shall comply with the provisions of GB/T 6519.
5.2 Design
5.2.1 Wall thickness design
5.2.1.1 In the wall thickness calculation for cylinder body design, it shall use the specified non-proportional extension strength guaranteed value after material heat treatment, AND such value shall not exceed 85% of the tensile strength guaranteed value.
5.2.1.2 It shall be based on pressure of the hydraulic pressure test, AND such pressure is 1.5 times the nominal working pressure.
5.2.1.3 The design wall thickness of the cylinder shall not be less than the calculated values of the formula (1) and formula (2), AND shall not be less than 1.5 mm.
5.2.2 End design
5.2.2.1 The thickness and shape of the bottom and shoulders shall comply with the requirements of hydraulic rupture tests and fatigue tests.
5.2.2.2 In order to make the stress distribution evenly, the wall thickness from the cylinder body to the shoulder and from the cylinder body to the bottom shall be gradually increased, AND the typical structure of the shoulder and the bottom is as shown in Figure 2.
5.2.2.3 The thickness of any part of the bottom shall not be less than the design wall thickness of the cylinder.
5.2.2.4 The inner bottom radius (r1) shall not be more than 1.2 times the inner diameter of the cylinder, AND the inner bottom corner radius (r) shall not be less than 10% of the inner diameter of the cylinder.
6 Test methods and qualification criteria
6.1 Wall thickness
It shall use the ultrasonic thickness gauge OR special measurement tools for testing.
Qualification criteria. the wall thickness of the cylinder at any point shall not be less than the d...

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