AS 2470-1998

1 - AS 2470-1998 STEEL CYLINDERS FOR COMPRESSED GASES-WELDED THREE-PIECE CONSTRUCTION WITH LONGITUDINAL JOINT-11 kg TO 150 kg
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
6 - 3 DEFINITIONS
6 - 3.1 Attachment
6 - 3.2 Competent person or body
6 - 3.3 Inspection Body
6 - 3.4 Inspector
6 - 4 CARBON STEEL
6 - 4.1 Cylindrical sections and ends
6 - 4.1.1 Steelmaking process
7 - 4.1.2 Cast analysis
7 - 4.1.3 Residual elements
7 - 4.1.4 Weldability
7 - 4.1.5 Mechanical properties
7 - 4.2 Attachments
7 - 5 DESIGN AND CONSTRUCTION
7 - 5.1 Minimum thickness
7 - 5.1.1 Cylindrical portions of shell (not including any part of the ends)
8 - 5.1.2 Ends
8 - 5.2 Form of ends
8 - 5.3 Footring
9 - 5.4 Length to outside diameter ratio
9 - 5.5 Valve protection
9 - 5.6 Pressure-retaining joints
9 - 5.6.1 General
9 - 5.6.2 Longitudinal joint
10 - 5.6.3 Circumferential joint
10 - 5.6.4 Non-pressure-retaining joints
11 - 5.7 Openings in cylinder
11 - 5.7.1 Location
11 - 5.7.2 Size, proportions and construction
11 - 5.7.3 Cylinder neck thread
11 - 5.7.4 Provision for safety device(s)
11 - 6 WELDING
11 - 6.1 Supervision of welding
11 - 6.2 Competence of welder
11 - 6.3 Repair of welds
13 - 6.4 Welding to attachments
13 - 7 INSPECTION AND TESTING
13 - 7.1 Radiographic examination
13 - 7.1.1 General
13 - 7.1.2 Frequency and extent
13 - 7.1.3 Methods and sensitivity
13 - 7.1.4 Acceptance standards
14 - 7.1.5 Treatment of imperfections disclosed by radiographic examination
14 - 7.1.6 Radiography of repairs
15 - 7.2 Visual inspection
15 - 7.2.1 Welded cylindrical section and unassembled end
15 - 7.2.2 Finished gas cylinder
15 - 8 HEAT TREATMENT
15 - 9 MECHANICAL TESTS
15 - 9.1 General
16 - 9.2 Test specimens
16 - 9.3 Tensile tests of parent metal
16 - 9.4 Transverse tensile test of longitudinal joint
16 - 9.5 Bend test(s) of longitudinal joint
16 - 9.6 Tensile test of circumferential joint
17 - 9.7 Bend test(s) of circumferential joint(s)
17 - 9.8 Retests for mechanical properties
17 - 10 PRESSURE TESTS
17 - 10.1 General
17 - 10.2 Proof test
17 - 10.3 Leakage test
18 - 11 TYPE TESTS
18 - 11.1 General
18 - 11.2 Stretch test
18 - 11.3 Hoop stress test
19 - 11.4 Pulsation test
19 - 11.5 Strength test of valve protection
20 - 12 SURFACE COATINGS
20 - 13 RECORD AND TEST CERTIFICATE(S)
21 - 14 STAMPING
22 - 15 PREPARATION FOR DISPATCH
23 - APPENDIX A - WELDED STAINLESS STEEL GAS CYLINDERS
23 - A1 GENERAL
23 - A2 REFERENCE DOCUMENTS
23 - A3 MATERIAL
23 - A3.1 Cylindrical sections and ends
23 - A3.2 Attachments
23 - A3.3 Intergranular corrosion tests
24 - A4 DESIGN AND CONSTRUCTION
24 - A4.1 General
24 - A4.2 Cylinder neck thread
24 - A5 WELDING
24 - A6 INSPECTION AND TESTING
24 - A7 SURFACE COATINGS
24 - A8 STAMPING
24 - A9 LOCATION OF TEST SPECIMENS
25 - APPENDIX B - SUGGESTED MINIMUM INFORMATION TO BE SUPPLIED BY THE PURCHASER
26 - APPENDIX C - LIST OF REFERENCED STANDARDS
28 - APPENDIX D - RESISTANCE SPOT WELDING FOR NON-PRESSURE-RETAINING ATTACHMENTS
28 - D1 GENERAL
28 - D2 VERIFICATION
28 - D3 PRODUCTION
29 - APPENDIX E - TEST SPECIMENS
30 - APPENDIX F - SUGGESTED FORM OF MANUFACTURER'S RECORD AND TEST CERTIFICATE

Introduces requirements for stainless steel in addition to the previously specified carbon steel for the manufacture of these compressed gas cylinders. It also includes the use of quality control procedures for manufacturers in Australia or checks on its implementation by overseas manufacturers at the point of entry into Australia.

This Standard specifies requirements for welded carbon and stainless steel cylinders with one longitudinal and two circumferential joints, of water capacity not less than 11 kg nor more than 150 kg, which have test pressures from 1750 kPa to 7000 kPa, and are intended for the storage and transport of compressed gases in accordance with AS 2030.1. Requirements for stainless steel cylinders are set out in Appendix A.NOTES:1 A gas cylinder manufactured by welding but which includes any brazing of, or on, the pressure-retaining portions is, for the purpose of this Standard, considered to be a brazed gas cylinder.2 Other Australian Standards for brazed and welded gas cylinders are AS 2468, AS 2469 and AS 3577.3 Appendix B lists the suggested minimum information that should be supplied by the purchaser when ordering gas cylinders to this Standard.

First published in part as part of AS B15-1950.
Revised and redesignated AS B115-1958.
Second edition 1966.
AS B239 first published 1970.
AS B239-1970 and part of AS B115-1966 revised, amalgamated and redesignated AS 2470-1981.
Second edition 1989.
Third edition 1995.
Fourth edition 1998.