How often should hydrostatic testing be performed on aluminum cylinders?

Hydrostatic testing of aluminum cylinders is a vital safety measure to ensure that the cylinders can withstand the pressures associated with SCUBA diving. This testing is used to check for leaks, deformations, and general structural integrity.

The correct interval for hydrostatic testing on aluminum cylinders is every 5 years. This recommendation is based on guidelines and regulations established by organizations such as the Department of Transportation (DOT) and other regulatory bodies that govern the safe use of compressed gas cylinders. By adhering to this 5-year testing schedule, it helps ensure that any potential weaknesses in the cylinder's metal are identified and addressed before they can lead to failure during use.

The other intervals suggested, such as every 3, 7, or 10 years, do not align with the standard practices for aluminum cylinders. Testing more frequently than necessary can be an unnecessary burden, while testing less frequently fails to provide adequate safety assurance over time. Regular hydrostatic testing at the 5-year mark strikes a balance between safety and practicality, ensuring that all cylinders in circulation are reliable and safe for use in diving operations.