Standard
UPDATE AVAILABLE
AS 4629-2005
[Superseded]Automatic shut off valves and vent valves
Specifies the uniform minimum requirements for manufacturers, designers, regulatory authorities, testing laboratories and similar organizations for the safety, performance and use of automatic shut off valves and vent valves. These automatic shut off valves and vent valves are intended for use with natural gas, town gas, tempered liquefied petroleum gas and liquefied petroleum gas.
Published: 01/06/2005
Pages: 50
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope, definitions and classification
1.1 Scope
1.2 Definitions
1.3 Classification
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 Attachment of knobs, handles, dials and pointers
2.2.8 Springs
2.2.9 Securing of parts
2.2.10 Sharp edges
2.2.11 Holes for assembly or mounting
2.2.12 Permanent sealing of non-functional holes
2.2.13 Self tapping screws
2.2.14 Construction of parts not covered by this Standard
2.2.15 Tightening of a gland or any other adjustments
2.2.16 Proof-of-closure and position indicating switches
2.3 Design
2.3.1 Fail-safe type
2.3.2 Safety device cannot be overridden
2.3.3 Automatic shut off valves and vent valves
2.3.4 Proof-of-closure switches
2.3.5 Vent valves
2.3.6 Position indicating switches
2.3.7 Adjusting device
2.3.8 Locking device
2.3.9 Connections
2.3.10 Special tools not required for servicing or replacement
2.3.11 Lubricant not required for safe closure of valve
2.3.12 Location or enclosure of electrical parts
2.3.13 Separation of operating parts from stowed wiring
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
3 Performance requirements
3.1 General
3.1.1 Satisfactory performance in all mounting positions
3.1.2 Satisfactory performance over declared temperature range
3.2 Opening and closing times
3.2.1 Class 1 and Class 2 valves
3.2.2 Class 3 valves
3.2.3 Vent valves
3.3 Opening pressure
3.3.1 Automatic valves to open up to rated working pressure
3.3.2 Vent valves to open up to 1.5 times rated working pressure
3.4 Operating effort
3.4.1 Manual torque or force to reset valve
3.4.2 Maximum instantaneous torque or force to reset valve
3.5 Gas leakage
3.5.1 External leakage
3.5.2 Internal leakage—Forward flow
3.5.3 Internal leakage—Reverse flow direction for shut off valves
3.5.4 Internal leakage—Reverse flow direction for vent valves
3.6 Flow rate
3.6.1 Flow rate for a given pressure
3.6.2 Flow capacity of vent valves
3.7 Voltage variation
3.7.1 Device functions fully and correctly above and below rated voltage range
3.8 Mechanical strength
3.8.1 Resistance to applied torque
3.8.2 Resistance to applied bending moments
3.9 Durability
3.9.1 Cycling test—Class 1 and Class 2 valves
3.9.2 Cycling test—Class 3 valves
3.9.3 Moisture resistance
3.9.4 Electrical load connections
3.9.5 Electrically operated automatic shut off valves
3.9.6 Operation of switches after durability test
Appendix A
Appendix B
B1 Test medium and gases
B1.1 Test medium
B1.2 Test gases
B2 Samples
B3 Lubricants
B4 M.O.T. 2.1.3 – 85 Non-metallic materials
B4.1 Scope
B4.2 Method
B4.3 Apparatus
B4.4 Materials
B4.5 Preparation of apparatus
B4.6 Procedure
B4.7 Result
B5 M.O.T. 2.1.4 – 85 Melting point of valve body
B5.1 Scope
B5.2 Method
B5.3 Apparatus
B5.4 Preparation of apparatus
B5.5 Procedure
B5.6 Result
B6 M.O.T. 2.3.4 – 90 Proof-of-closure switches
B6.1 Scope
B6.2 Method
B6.3 Apparatus
B6.4 Materials
B6.5 Preparation of apparatus
B6.6 Procedure
B6.7 Result
B7 M.O.T. 2.3.6(A) – 90 Position indicating switches
B7.1 Scope
B7.2 Method
B7.3 Apparatus
B7.4 Preparation of apparatus
B7.5 Procedure
B7.6 Result
B8 M.O.T. 2.3.6(B) – 90 Flow capacity
B8.1 Scope
B8.2 Method
B8.3 Apparatus
B8.4 Materials
B8.5 Preparation of apparatus
B8.6 Procedure
B8.7 Result
B9 M.O.T. 2.4.3 – 95 Markings and labels
B9.1 Scope
B9.2 Method
B9.3 Apparatus
B9.4 Materials
B9.5 Procedure
B9.6 Result
B10 M.O.T. 3.3.2 – 88 Vent valves—Opening against pressure differential
B10.1 Scope
B10.2 Method
B10.3 Apparatus
B10.4 Materials
B10.5 Preparation of apparatus
B10.6 Procedure
B10.7 Result
B11 M.O.T. 3.4.1/2 – 88 Operating effort
B11.1 Scope
B11.2 Method
B11.3 Apparatus
B11.4 Materials
B11.5 Preparation of apparatus
B11.6 Procedure
B11.7 Result
B12 M.O.T. 3.5.1(A) – 03 External leakage
B12.1 Scope
B12.2 Method
B12.3 Apparatus
B12.4 Materials
B12.5 Preparation of apparatus
B12.6 Procedure
B12.7 Result
B13 M.O.T. 3.5.1(B) – 88 Hydrostatic strength test
B13.1 Scope
B13.2 Method
B13.3 Apparatus
B13.4 Preparation of apparatus
B13.5 Procedure
B13.6 Result
B14 M.O.T. 3.5.2 – 03 Internal leakage—Forward flow
B14.1 Scope
B14.2 Method
B14.3 Apparatus
B14.4 Materials
B14.5 Preparation of apparatus
B14.6 Procedure
B14.7 Result
B15 M.O.T. 3.5.3 – 85 Internal leakage—Reverse flow
B15.1 Scope
B15.2 Method
B15.3 Apparatus
B15.4 Materials
B15.5 Preparation of apparatus
B15.6 Procedure
B15.7 Result
B16 M.O.T. 3.6.2 – 85 Flow capacity
B16.1 Scope
B16.2 Method
B16.3 Apparatus
B16.4 Materials
B16.5 Preparation of apparatus
B16.6 Procedure
B16.7 Result
B17 M.O.T. 3.8.1 – 85 Torque test
B17.1 Scope
B17.2 Method
B17.3 Apparatus
B17.4 Materials
B17.5 Preparation of apparatus
B17.6 Procedure
B17.7 Result
B18 M.O.T. 3.8.2 – 85 Bending moment test
B18.1 Scope
B18.2 Method
B18.3 Apparatus
B18.4 Preparation of apparatus
B18.5 Procedure
B18.6 Result
B19 M.O.T. 3.9.1(A) – 01 Durability—Class 1 and class 2 automatic shut off valves
B19.1 Scope
B19.2 Method
B19.3 Apparatus
B19.4 Materials
B19.5 Procedure
B19.6 Result
B20 M.O.T. 3.9.1(B) – 01 Durability—Vent valves
B20.1 Scope
B20.2 Method
B20.3 Apparatus
B20.4 Materials
B20.5 Procedure
B20.6 Result
B21 M.O.T. 3.9.2 – 01 Durability—Class 3 automatic shut off valves
B21.1 Scope
B21.2 Method
B21.3 Apparatus
B21.4 Materials
B21.5 Preparation of apparatus
B21.6 Procedure
B21.7 Result
B22 M.O.T. 3.9.3 – 85 Durability—Moisture resistance
B22.1 Scope
B22.2 Method
B22.3 Materials
B22.4 Apparatus
B22.5 Procedure
B22.6 Result
B23 M.O.T. 3.9.5 – 85 Durability—Continuous energizing
B23.1 Scope
B23.2 Method
B23.3 Materials
B23.4 Apparatus
B23.5 Procedure
B23.6 Result
Appendix C
Appendix D
Amendment control sheet
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
Content history
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