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AS 1777-2005
[Current]Aluminium cylinders for compressed gases — Seamless — 0.1 kg to 130 kg
Specifies requirements for seamless aluminium cylinders having a water capacity exceeding 0.1 kg but not exceeding 130 kg intended for the storage and transport of compressed gases, and designed for a hydrostatic test pressure of not less than 1.75 MPa.
Published: 16/11/2005
Pages: 31
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope
2 Application
3 Referenced documents
4 Definitions
5 Aluminium alloy
5.1 Chemical composition
5.2 Tensile properties (from cylinder)
5.3 Freedom from defects
5.4 Grain size
5.5 Aluminium log identification
5.6 Certification
6 Design and construction
6.1 Form of base ends
6.2 Thickness and dimensions
6.2.1 Wall thickness of cylindrical portion
6.2.2 Thickness of base end
6.2.3 Wall thickness of valve end
6.2.4 Dimensions at base end
6.3 Provision for valve and safety devices
6.4 Valve protection
7 Manufacture
7.1 Processes
7.2 Inspection and repair
7.2.1 Thickness and surface defects
7.2.2 Folding at valve end
7.2.3 Repair and re-examination
8 Heat treatment
9 Testing (see Appendix B)
9.1 Mechanical properties (batch tests)
9.1.1 Test cylinders
9.1.2 Tensile test
9.1.3 Bend test
9.1.4 Corrosion test
9.1.5 Retests
9.2 Pressure tests
9.2.1 General
9.2.2 Hydrostatic stretch test
9.3 Type tests
9.3.1 General
9.3.2 Hydrostatic-type test
9.3.3 Pulsation-type test
9.3.4 Stress corrosion test
9.3.5 New design of cylinder
10 Record and test certificate(s)
11 Marking
12 Preparation for dispatch
Appendix A
Appendix B
Appendix C
Appendix D
D1 Evaluation of sensitivity to intercrystalline corrosion
D1.1 Principle
D1.2 Procedure
D1.3 Preparation of surface before etching
D1.3.1 Reagents
D1.3.2 Solution preparation
D1.3.3 Procedure
D1.4 Preparation of corrosive solution
D1.5 Etching
D1.6 Preparation of test pieces for examination
D1.6.1 Materials
D1.6.2 Method
D1.7 Micrographic examination of specimens
D1.8 Interpretation of micrographic examination
D1.8.1 Alloys with an equiaxial crystal structure
D1.8.2 Alloys with crystal structure oriented in one direction as a result of cold working
D2 Test to evaluate sensitivity to stress corrosion
D2.1 Principle
D2.2 Tests specimens
D2.3 Preparation of surfaces before corrosion testing
D2.4 Preparation of corrosive solution
D2.5 Stressing rings
D2.6 Interpretation of results
D2.7 Metallographic examination
D2.8 Test report
Appendix E
E1 General
E2 Method A
E3 Method B
Appendix F
Cited references in this standard
CGA V-1
Compressed gas cylinder valve outlet and inlet connections
BS 5045
Transportable gas containers, Part 8: Specification for seamless aluminium alloy gas containers of water capacity 0.5 litre up to 15 litre and up to 300 bar charged pressure at 15°C for special portable application
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