A star stamp indicates that the cylinder meets the requirements for a how many year retest?

A star stamp on a cylinder indicates that the cylinder has been tested and meets the requirements for a 10-year retest cycle. This marking signifies that the cylinder has undergone rigorous testing and meets enhanced safety standards, allowing it to be requalified for use after that period. It is vital for ensuring the continued safety and integrity of the compressed gas storage. In contrast, other markings or stamps may indicate different retest intervals or conditions, but the specific star stamp is recognized universally for a 10-year retesting schedule.