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