AS 2473-1990

1 - AS 2473-1990 VALVES FOR COMPRESSED GAS CYLINDERS (THREADED OUTLET)
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE.
6 - 2 REFERENCED DOCUMENTS.
6 - 3 DEFINITIONS.
6 - 4 THREADS.
6 - 4.1 Valve stem (inlet) thread.
6 - 4.1 Valve outlet connection thread.
6 - 5 DIMENSIONS.
6 - 5.1 Spindle.
6 - 5.2 Outlet connection.
6 - 6 VALVE OPERATION.
6 - 7 MATERIALS.
7 - 8 MANUFACTURE.
7 - 9 PRESSURE RATING.
7 - 10 TESTING.
7 - 10.1 Tests.
7 - 10.2 Pressure tests.
7 - 10.2.1 Hydrostatic.
7 - 10.2.2 Pneumatic.
7 - 11 MARKING.
8 - TABLE 1 SPECIAL TAPER STEM THREAD PRINCIPAL THREAD DIMENSIONS AND LIMITS
9 - TABLE 2 SPECIAL PARALLEL STEM THREAD PRINCIPAL THREAD DIMENSIONS AND LIMITS
10 - TABLE 3 VALVE DETAILS FOR SPECIFIC GASES AT STANDARD PRESSURES (UP TO 20 000 kPa)
13 - TABLE 4 VALVE DETAILS FOR SPECIFIC GASES AT EXTRA HIGH PRESSURES (EHP) (20 000 kPa AND GREATER)
13 - TABLE 5 DIMENSIONS OF SPINDLE EXTENSION END
13 - TABLE 6 RECOMMENDED OUTLET DETAILS FOR GASES AND GAS MIXTURES NOT SPECIFICALLY LISTED IN TABLE 3 OR TABLE 4
14 - TABLE 7(a) FOR TYPE 10 CONNECTION
15 - TABLE 7(b) FOR TYPE 11 CONNECTION
16 - TABLE 7(c) FOR TYPE 20 CONNECTION
17 - TABLE 7(d) FOR TYPE 21 CONNECTION
18 - TABLE 7(e) FOR TYPE 30 CONNECTION
19 - TABLE 7(f) FOR TYPE 31 CONNECTION
20 - TABLE 7(g) FOR TYPE 32 CONNECTION
21 - TABLE 7(h) FOR TYPE 33 CONNECTION
22 - TABLE 7(i) FOR TYPE 34 CONNECTION
23 - TABLE 7(j) FOR TYPE 40 CONNECTION
24 - TABLE 7(k) FOR TYPE 41 CONNECTION
25 - TABLE 7(l) FOR TYPE 42 CONNECTION
26 - TABLE 7(m) FOR TYPE 43 CONNECTION
27 - APPENDIX A - RECOMMENDED GAUGES FOR CYLINDER NECK AND VALVE STEM THREADS
27 - A1 GENERAL APPLICATION.
27 - A2 DIMENSIONS AND FORMS.
27 - A3 USE.
27 - A4 HARDNESS.
27 - A5 MARKING.
28 - TABLE A1 BASIC FORM AND TOLERANCES* FOR GAUGES FOR 0.6, 0. 715, AND 1.0 THREADS (TAPER THREADS, WHITWORTH FORM NORMAL TO CONE)
29 - TABLE A2 DIMENSIONS AND TOLERANCES* FOR GAUGES, 3/ 4 NGS THREAD
30 - TABLE A3 FULL FORM PLUG SCREW GAUGE
30 - TABLE A4 PLUG SCREW GAUGE FOR EFFECTIVE DIAMETER
31 - TABLE A5 PLUG SCREW GAUGE FOR EFFECTIVE DIAMETER
31 - TABLE A6 RING SCREW GAUGE
32 - TABLE A7 PLAIN RING GAUGE FOR MAJOR DIAMETER
33 - APPENDIX B - SUGGESTED SAMPLE SELECTION FOR TEST PURPOSES
34 - APPENDIX C - 3/8 IN BSP PARALLEL THREAD CYLINDER VALVE WITH SOFT-SOLDERED SEAL
35 - APPENDIX D - IMPACT STRENGTH TEST FOR VALVES/VALVE PROTECTION
35 - D1 GENERAL.
35 - D2 ACCEPTANCE CRITERIA. When a
35 - D3 TEST RIG.
35 - D4 IMPACT VALUE.
35 - D5 PROCEDURE.
35 - D6 REPORT.
36 - TABLE D1 IMPACT VALUE

Specifies inlet and outlet connection threads, material, testing, valve spindle dimensions and operations, and marking requirements, for compressed gas cylinder valves with threaded outlet connections for a nominated range of gases.

This Standard specifies inlet and outlet connection threads, material, testing, valve spindle dimensions and operations, and marking requirements for compressed gas cylinder valves with threaded outlet connections for a nominated range of gases. It also specifies dimensional details of the outlet connecting parts.Appendix A specifies a special valve for use on small seamless gas cylinders filled with carbon dioxide and its future use is undecided (see Note 2).NOTES:1 Requirements for compressed gas cylinder valves, with a pin-indexed system of outlet connections (for medical application) or with a diameter-indexed system of outlet connections, are specified in AS 2472 and AS 2474.2 Comment is sought as to whether this special valve is relevant in today's industry.This Standard does not apply to valves for portable gas cylinders of less than 11 kg capacity for self-contained breathing apparatus, or to valves for fire extinguishers.NOTE: Comment is sought, especially from the 'self-contained breathing apparatus' (SCBA) industries, as to the relevance of this 11 kg capacity in today's industry.

Obsolescent 1996
Under Revision See DR 95102