Manufacturer’s requirement for eddy-current testing of Luxfer cylinders manufactured from aluminium alloy 6351.
Do not use Luxfer Gas Cylinders (Luxfer) 6351-alloy SCUBA and SCBA cylinders that have not been both visually inspected and eddy-current tested.
Filling and testing stations in New Zealand must not fill Luxfer made from the aluminium alloy 6351 that have not been eddy-current tested.
In 2004, Luxfer introduced a requirement to eddy- current test all Luxfer SCUBA and SCBA cylinders made from aluminium alloy 6351 in the periods and following countries:
Australia: 1975 through 1990
United States: 1972 through mid-1988
England: 1967 through 1995.
From AS 2337.1:2004 (Gas cylinder test stations Part 1: General requirements, inspection and tests – gas cylinders) section 7.1: ‘Any additional tests required by either the manufacturer or the design specification shall also be carried out’.
Luxfer has issued a manufacturer’s requirement for eddy-current testing on Luxfer SCUBA and SCBA cylinders manufactured from aluminium alloy 6351. This is therefore required by the standard for testing gas cylinders – AS 2337.1:2004.
Actions for periodic testers
Anyone who undertakes periodic testing on SCUBA and SCBA cylinders manufactured from aluminium alloy 6351 must:
Conduct eddy-current testing in accordance with manufacturer’s instructions.
For cylinders that pass periodic testing, the cylinder test report must include whether testing has included eddy-current testing.
Where cracks are evident during testing, the cylinder must be condemned.
What is eddy-current testing?
Eddy-current devices are tools to enhance visual inspections and improve the quality and accuracy of inspections.
Eddy-current testing does not eliminate the need for thorough visual inspection by trained and qualified periodic testers.
Note - The design approval has been withdrawn for cylinders made from aluminium alloy 6351, effective from 31 October 2017. See our alert for more information.