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AS 4630-2005
[Current]Specifies the uniform minimum requirements for manufacturers, designers, regulatory authorities, testing laboratories and similar organizations for the safety, performance and use of leakage detection systems. These leakage detection systems are intended for use with natural gas, town gas, tempered liquefied petroleum gas and liquefied petroleum gas.
Published: 01/06/2005
Pages: 17
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND DEFINITIONS
1.1 SCOPE
1.2 DEFINITIONS
2 DESIGN AND CONSTRUCTION
2.1 MATERIALS
2.1.1 Continuity of satisfactory operation
2.1.2 Suitability of materials for conditions of use
2.1.3 Materials in contact with gas
2.1.4 Melting point of materials
2.1.5 Brass parts
2.1.6 Component parts materials selected to appropriate Standards
2.2 CONSTRUCTION
2.2.1 Continuity of satisfactory operation
2.2.2 Castings and hot pressings
2.2.3 Sealing of porous castings or cracks
2.2.4 Assembled device to be clean
2.2.5 Accidental displacement of parts
2.2.6 Prevention of accidental shift after calibration
2.2.7 Securing of parts together
2.2.8 Sharp edges
2.2.9 Self-tapping screws
2.2.10 Construction of parts not covered by this Standard
2.3 DESIGN
2.3.1 Fail-safe type
2.3.2 Safety device cannot be overridden
2.3.3 Adjusting device
2.3.4 Accessibility of integral parts
2.3.5 Adjusting device
2.3.6 Locking device
2.3.7 Components requiring servicing
2.3.8 Special tools not required for servicing or replacement
2.3.9 Protection of mechanism
2.3.10 Connections
2.3.11 Pressure-sensing line connection(s)
2.3.12 Mounting method
2.3.13 Location or enclosure of electrical parts
2.3.14 Separation of operating parts from stowed wiring
2.3.15 Switch contacts
2.4 MARKINGS
2.4.1 General
2.4.2 Marking of electrical connections
2.4.3 Durability of markings
2.5 INSTRUCTIONS
2.5.1 General
2.5.2 Leakage rate when commissioned according to manufacturer’s instructions
3 PERFORMANCE REQUIREMENTS
3.1 GENERAL
3.1.1 Lockout if leak is greater than specified minimum
3.1.2 Resetting of the system
3.1.3 Lockout due to auxiliary fluid supply failure
3.1.4 Satisfactory performance over declared temperature range
3.2 GAS LEAKAGE
3.2.1 External leakage
3.3 VOLTAGE VARIATION
3.3.1 Device functions fully and correctly above and below rated voltage range
3.4 DURABILITY
3.4.1 Cycling test
3.4.2 Satisfactory operation of electrical contacts
3.4.3 Moisture resistance
3.4.4 Electrical load connections
3.4.5 Thermal resistance
Appendix A
Appendix B
B.1 TEST MEDIUM AND TEST GASES
B.1.1 TEST MEDIUM
B.1.2 TEST GASES
B.2 SAMPLES
B.3 LUBRICANTS
B.4 M.O.T. 2.4.3 – 95 MARKINGS AND LABELS
B.4.1 SCOPE
B.4.2 METHOD
B.4.3 APPARATUS
B.4.4 MATERIALS
B.4.5 PROCEDURE
B.4.6 RESULT
B.5 M.O.T. 3.1.1/3.1.4 – 85 LEAKAGE DETECTION
B.5.1 SCOPE
B.5.2 METHOD
B.5.3 APPARATUS
B.5.4 PREPARATION OF APPARATUS
B.5.5 PROCEDURE
B.5.6 RESULT
B.6 M.O.T. 3.2.1 – 85 FUNCTIONAL RESET TEST UPON SUPPLY INTERRUPTION TO LEAK DETECTION SYSTEM
B.6.1 SCOPE
B.6.2 METHOD
B.6.3 APPARATUS
B.6.4 MATERIALS
B.6.5 PREPARATION OF APPARATUS
B.6.6 PROCEDURE
B.6.7 RESULT
B.7 M.O.T. 3.1.3 – 85 FAILURE OF AUXILIARY FLUID SUPPLY
B.7.1 SCOPE
B.7.2 METHOD
B.7.3 APPARATUS
B.7.4 MATERIALS
B.7.5 PREPARATION OF APPARATUS
B.7.6 PROCEDURE
B.7.7 RESULT
B.8 M.O.T. 3.2.1 – 85 EXTERNAL LEAKAGE
B.8.1 SCOPE
B.8.2 METHOD
B.8.3 APPARATUS
B.8.4 MATERIALS
B.8.5 PREPARATION OF APPARATUS
B.8.6 PROCEDURE
B.8.7 RESULT
B.9 M.O.T. 3.4.1/3.4.2/3.4.3/3.4.4/3.4.5 – 85 DURABILITY
B.9.1 SCOPE
B.9.2 METHOD
B.9.3 APPARATUS
B.9.4 PROCEDURE
B.9.5 RESULT
Appendix C
Appendix D
AMENDMENT CONTROL SHEET
Amendment No. 1 (2017)
REVISED TEXT
Cited references in this standard
[Current]
Method for detecting the susceptibility of copper and its alloys to stress corrosion cracking using the mercurous nitrate test
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