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AS 4631:2018
[Current]Semi-rigid connectors for gas
This Standard specifies the minimum safety and performance requirements for limited flexibility connectors for use on natural gas (NG), simulated natural gas (SNG), town gas (TG), tempered liquefied petroleum gas (TLP) and liquefied petroleum gas (LPG) (liquid and vapour phases).
Published: 04/05/2018
Pages: 36
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and definitions
1.1 Scope
1.2 Normative references
1.3 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 metallic materials
2.1.5 Copper containing alloys
2.1.6 Component parts materials selected to appropriate Standards
2.2 Construction
2.2.1 Continuity of satisfactory operation
2.2.2 Sharp edges
2.2.3 Construction of parts not covered by this Standard
2.2.4 End fittings
2.2.5 Threaded end fittings with spanner flats
2.2.6 Threaded end fittings
2.2.7 Quick connect device
2.3 Bore dimensions
2.4 Markings
2.4.1 General
2.4.2 Durability of markings
3 Performance requirements
3.1 Rated working pressure
3.2 Hydrostatic strength
3.3 Proof pressure
3.4 Minimum flow capacity
3.4.1 Pressure drop
3.4.2 Pressure drop due to kinking
3.5 Resistance to pull
3.6 Resistance to crushing
3.7 Resistance to temperature—gas tightness after exposure to high temperature
3.8 Flame propagation and resistance
3.9 Resistance to gas
3.10 Flexibility
3.10.1 Cycling test through arc of 180°
3.10.2 Cycling test with pull force
Appendix A
Appendix B
B1 Test medium and test gases
B1.1 Test medium
B1.2 Test gases
B2 Samples
B3 Heat resistance
B3.1 Scope
B3.2 Method
B3.3 Apparatus
B3.4 Procedure
B3.5 Result
B4 Markings and labels
B4.1 Scope
B4.2 Method
B4.3 Apparatus
B4.4 Materials
B4.5 Procedure
B4.6 Test report
B5 Burst pressure
B5.1 Scope
B5.2 Method
B5.3 Apparatus
B5.4 Materials
B5.5 Preparation of apparatus
B5.6 Procedure
B5.7 Test report
B6 Proof pressure
B6.1 Scope
B6.2 Method
B6.3 Apparatus
B6.4 Materials
B6.5 Preparation of apparatus
B6.6 Procedure
B6.7 Test report
B7 Minimum flow capacity
B7.1 Scope
B7.2 Method
B7.3 Apparatus
B7.4 Materials
B7.5 Preparation of apparatus
B7.6 Procedure
B7.7 Test report
B8 Resistance to kinking
B8.1 Scope
B8.2 Method
B8.3 Apparatus
B8.4 Preparation of apparatus
B8.5 Procedure
B8.6 Test report
B9 Resistance to pull
B9.1 Scope
B9.2 Method
B9.3 Apparatus
B9.4 Materials
B9.5 Procedure
B9.6 Test report
B10 Resistance to crushing
B10.1 Scope
B10.2 Method
B10.3 Apparatus
B10.4 Procedure
B10.5 Test report
B11 Resistance to temperature
B11.1 Scope
B11.2 Method
B11.3 Apparatus
B11.4 Preparation of apparatus
B11.5 Procedure
B11.6 Test report
B12 Flame propagation and resistance
B12.1 Scope
B12.2 Method
B12.3 Apparatus
B12.4 Materials
B12.5 Preparation of sample
B12.6 Procedure
B12.7 Test report
B13 Resistance to gas
B13.1 Scope
B13.2 Method
B13.3 Apparatus
B13.4 Materials
B13.5 Procedure
B13.6 Test report
B14 Resistance to liquid LP gas
B14.1 Scope
B14.2 Method
B14.3 Apparatus
B14.4 Materials
B14.5 Preparation
B14.6 Procedure
B14.7 Result
B15 Resistance of lining to gas
B15.1 Scope
B15.2 Method
B15.3 Apparatus
B15.4 Materials
B15.5 Procedure
B15.6 Result
B16 Flexing test—angular
B16.1 Scope
B16.2 Method
B16.3 Apparatus
B16.4 Procedure
B16.5 Test report
B17 Flexing test—bending
B17.1 Scope
B17.2 Method
B17.3 Apparatus
B17.4 Procedure
B17.5 Test report
Appendix C
Amendment control sheet
Cited references in this standard
[Current]
Pipe threads where pressure-tight joints are made on the threads, Part 1: Dimensions, tolerances and designation
[Current]
Method for detecting the susceptibility of copper and its alloys to stress corrosion cracking using the mercurous nitrate test
AS/NZS 5601
Gas installations (all parts)
Content history
[Current]
[Superseded]
[Superseded]
DR AS 4631:2017
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