AS 4647-2005

1 - AS 4647-2005 DOMESTIC DIAPHRAGM GAS METERS
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE, REFERENCES AND DEFINITIONS
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 DEFINITIONS
7 - 1.3.1 Accelerated life test
7 - 1.3.2 Badge
7 - 1.3.3 Badge capacity
7 - 1.3.4 Capacity
7 - 1.3.5 Cyclic capacity
7 - 1.3.6 Fast registration
7 - 1.3.7 Meter
7 - 1.3.8 Meter connections
7 - 1.3.9 Meter error
7 - 1.3.10 Meter index
7 - 1.3.11 Metered cubic metre
7 - 1.3.12 Pressure absorption
8 - 1.3.13 Pressure differential
8 - 1.3.14 Pressure oscillation
8 - 1.3.15 Proving dial
8 - 1.3.16 Proving drum
8 - 1.3.17 Slow registration
8 - 1.3.18 Standard conditions
8 - 1.3.19 Test pressure
8 - 1.3.20 Type test
9 - SECTION 2 WORKING ENVIRONMENT
9 - 2.1 GAS TYPE
9 - 2.2 TEMPERATURE
9 - 2.3 PRESSURE
10 - SECTION 3 METER CONSTRUCTION
10 - 3.1 MATERIALS OF CONSTRUCTION
10 - 3.1.1 General
10 - 3.1.2 Aluminium components
10 - 3.1.3 Steel components
10 - 3.1.4 Metal castings
10 - 3.1.5 Case jointing materials
10 - 3.1.6 Valve covers and grids
10 - 3.1.7 Sealing glands
11 - 3.1.8 Diaphragms, synthetic
11 - 3.1.9 Gearing
11 - 3.1.10 Solder
11 - 3.1.11 Miscellaneous components
11 - 3.2 METER CASE
11 - 3.2.1 Meter connections for diaphragm meters
11 - 3.2.2 Mechanical strength
11 - 3.2.3 Soldered joints
12 - 3.2.4 Jointing of cast and fabricated case meters
12 - 3.2.5 Protective coating
12 - 3.2.6 Heat resistance
12 - 3.2.7 Indices
13 - 3.2.8 Index housing
13 - 3.2.9 Labelling meters
13 - 3.2.10 Sealing of meters
13 - 3.2.11 Protection of interior of meters
13 - 3.3 INTERNAL CONSTRUCTION
13 - 3.3.1 General
14 - 3.3.2 Attachment of gears and collars
14 - 3.3.3 Soldered joints
14 - 3.3.4 Bearings
14 - 3.3.5 Diaphragms
14 - 3.3.6 Valves
14 - 3.4 UNIFORMITY OF METERS
15 - SECTION 4 PERFORMANCE
15 - 4.1 NOISE IN OPERATION
15 - 4.2 INITIAL PERFORMANCE
16 - SECTION 5 ROUTINE TESTING AND INSPECTION
16 - 5.1 GENERAL
16 - 5.2 TESTS TO BE CONDUCTED
16 - 5.2.1 Performance tests
16 - 5.2.2 Case soundness
16 - 5.2.3 External examination
16 - 5.3 PERIODIC TESTS
17 - APPENDIX A - REQUIREMENTS AND TYPE TESTS FOR PLASTIC AND GLASS INDEX WINDOWS
17 - A1 REQUIREMENTS
17 - A1.1 General
17 - A1.2 Visual inspection
17 - A1.3 Rigidity
17 - A1.4 Impact
17 - A1.5 Flammability
17 - A2 ACCELERATED DETERIORATION TESTS
17 - A2.1 General
18 - A2.2 Effect of ultraviolet light and loss of volatile plasticizer
19 - APPENDIX B - TEST REQUIREMENTS FOR SYNTHETIC DIAPHRAGMS
19 - B1 HYDROCARBON IMMERSION TEST
19 - B2 WATER ABSORPTION TEST
19 - B3 ACCELERATED AGEING TEST
19 - B4 FATIGUE RESISTANCE TEST
20 - B5 LOW TEMPERATURE FLEXIBILITY TEST
20 - B6 POROSITY TEST
21 - APPENDIX C - TEST REQUIREMENTS FOR MECHANICAL STRENGTH OF METER CASES
21 - C1 METER CASE DISTORTION TEST
21 - C2 METER CASE AND CONNECTION RIDGIDITY TEST
22 - APPENDIX D - TEST REQUIREMENTS FOR DROP TESTING OF STANDARD DIAPHRAGM DOMESTIC GAS METERS
22 - D1 TEST PROCEDURE
23 - APPENDIX E - TEST REQUIREMENTS FOR PROTECTIVE COATING OF DOMESTIC GAS METERS
23 - E1 TEST PROCEDURE
24 - APPENDIX F - TEST REQUIREMENT FOR ELECTROMAGNETIC SUSCEPTIBILITY
24 - F1 TEST OUTCOMES
24 - F2 TEST PROCEDURE
25 - APPENDIX G - TEST REQUIREMENT FOR PERFORMANCE AFTER OPERATION
26 - APPENDIX H - TENDER REQUIREMENTS
26 - H1 SCOPE
26 - H2 QUANTITY OF METERS TO BE SUPPLIED
26 - H3 TENDER CLOSING DATE
26 - H4 PARTICULAR REQUIREMENTS
26 - H5 CONTRACT DATES
26 - H6 GUARANTEE
26 - H7 SPARE PARTS
26 - H7.1 Availability
27 - H7.2 Delivery
27 - H8 DUMPING DUTY
27 - H9 QUALITY ASSURANCE POLICY
28 - APPENDIX I - WILLIAM TORSION TEST OF STIFFNESS
28 - I1 Principle
28 - I2 Apparatus
28 - I3 Procedure
29 - I4 Calculation of the percentage change in stiffness
30 - APPENDIX J - SYNTHETIC DIAPHRAGM POROSITY TEST
30 - J1 Procedure
31 - APPENDIX K - FIGURES

Provides basic requirements for domestic diaphragm gas meters under tender, to ensure optimum performance, both, when purchased, and after extended service; and to satisfy the requirements of statutory authorities after due consideration is given to variations in accuracies of meter testing. Covers the working environment, materials of construction and performance required of domestic diaphragm meters of badge capacity up to 6 m3/h when tested at standard conditions (MSC) on air.

This Standard covers the working environment, materials of construction and performance required of domestic diaphragm meters of badge capacity up to 6m3/h when tested at standard conditions (MSC) on air. Materials used, methods of construction and finish shall be suitable to enable a working life of twenty years between repairs.

Originated as AG 702-1976.
Previous edition 1996.
Revised and redesignated as AS 4647-2005.