AS 4627:2017 Quick-connect devices for gas.
AS 4627 specifies requirements and test methods for quick-connect devices up to 50 mm size for use on natural gas (NG), simulated natural gas (SNG), town gas (TG), tempered liquefied petroleum gas (TLP) and liquefied petroleum gas in vapour phase (LP Gas).
Appendix A sets out the figures that are referred to in this Standard.
Appendix B sets out the methods of tests (M.O.T.s) to demonstrate conformity with requirements of this Standard.
NOTE: The test method titles include a M.O.T. number which indicates the Clause(s) in which the test criteria are located.
The quick-connect device shall be classified according to type.
Three types of quick-connect device shall be as follows:
(a) Type 1—A quick-connect device permitting gas flow only when the mating parts are connected, with a rated working pressure of 14 kPa, consisting of a plug and socket which may be approved and used separately. The Type 1 plug shall conform to the dimensions shown in Figure Al. The Type I socket shall be compatible with the plug shown in Figure Al.
NOTE: Commonly known as bayonet fitting.
(b) Type 2—A quick-connect device with safety shut off permitting gas flow only when the mating parts arc connected, with a minimum rated working pressure of’ 14 kPa.
(c) Type 3—A quick-connect device without shut off, with a minimum rated working pressure of 14 kPa.
The following documents are referred to in this Standard:
AS 2136 Method for detecting the susceptibility of copper and its alloys to stress corrosion cracking using the mercurous nitrate test
AS/NZS 1869 Hose and hose assemblies for liquefied petroleum gases (LP Gas), natural gas and town gas
For the purposes of this Standard, the following definitions apply:
1.4.1 Bayonet fitting
A Type 1 quick-connect device designed for attachment so that the gas is turned on only when the male part is inserted and secured in a lock-fit recess and gas will not flow when the male part is removed.
1.4.2 Gas
A combustible fuel gas. Liquefied petroleum gas (LP Gas)
A gas composed predominantly of any of the following hydrocarbons, or any combination of them: propane, propene (propylene), butane, butene (butylene). Natural gas (NG)
A hydrocarbon gas, consisting mainly of methane.
1 .4.2.3 Simulated natural gas (SNG)
A gas comprising a mixture of LP Gas and air, in the approximate proportions of 55% LP Gas and 45% air.AS 4627 pdf download.