AS 4627:2017 pdf free.Quick-connect devices for gas.
2.l MATERIALS
2.1.1 Continuity of satisfactory operation
Materials used in the construction of a quick-connect device shall be such that continuity of satisfactory operation can he expected during normal usage within the manufacturer’s speci lication.
2.1.2 Suitability of materials for conditions of use
Materials and finishes, including dressings and lubricants, used in the construction, shall he suitable for the conditions of use (e.g. corrosion, temperature and handling).
2.1.3 Materials in contact with gas
Materials in contact with the gas, including dressings. lubricants and jointing compounds, shall be suitable for use with all gases.
2.1.4 NIelting point of materials
The quick-connect device body(s), valve plugs, related structural components and retaining devices shall be made of materials with a melting point not less than 430°C.
2.1.5 Brass parts
Brass parts shall be resistant to stress-corrosion cracking when tested in accordance with
AS 2136.
2.1.6 Component parts materials selected to appropriate Standards
Alloys used for component parts shall be selected from appropriate Australian Standards or their equivalent.
2.2 CONSTRUCTION
2.2.1 Continuity of satisfactory operation
The construction of a quick-connect device shall ensure the continued safe operation of the unit during usage within the manufacturer’s specification.
2.2.2 Castings and hot pressings
All castings and hot pressings shall be clean and sound, free from laps, blow holes and pitting and all surfaces not machine finished shall he clean, smooth and free from sand.
2.2.3 Sealing of porous castings or cracks
Porous castings or cracks in gas-carrying parts shall not be sealed other than by an accepted method for the impregnation of castings, e.g. vacuum impregnation.
2.2.4 Assembled des ice to be clean
The assembled quick-connect device shall not contain dirt, casting sand, swarf or other foreign matter. There shall be no excess diaphragm dressing or jointing compound in the device.
2.2.5 Accidental displacement of parts
Every part of a quick-connect device shall be secure against accidental displacement and shall be constructed to maintain a fixed relationship between essential parts under normal and reasonable conditions of handling and usage so as to ensure continued performance in accordance with this Standard.
tandards Australia www.standards.org.AS 4627 pdf dowload.