Following a number of recent incidents, the HSE have recently issued a warning concerning the risk of catastrophic failure of old aluminium scuba cylinders. This concerns cylinders manufactured between 1963 and 1995.
The action required is :
- Check to see if any of your cylinders are manufactured or suspected to be manufactured from aluminium alloys HE30/AA6082 or AA6351. Check for specific alloy-related markings or for a manufacture date (the earliest date stamped on the cylinder) prior to 1995. If you believe that a cylinder may be made from either of these alloys, then you should assess the risk of continued use by considering the cylinder’s age, history of use and previous testing.
- If you cannot determine the alloy and appropriate information as described in BS EN 1802—e.g., if you cannot easily read markings on the cylinder or if markings are missing—you must remove the cylinder from service, safely release the gas and render the cylinder incapable of holding pressure.
- If you are unable to confirm that eddy-current testing was performed on an HE30/AA6082 or AA6351 cylinder, remove it from service, safely release the gas and do not use the cylinder until eddy-current testing can be performed.
The full details of the warning can be accessed on the HSE website at http://www.hse.gov.uk/safetybulletins/aluminium-cylinders.htm