A star stamp on a compressed gas cylinder indicates it meets the requirements for how many years of retest?

A star stamp on a compressed gas cylinder indicates that the cylinder has passed a retest and can be used for an extended period of 10 years from the time of that retest. This is significant because it implies that the cylinder has undergone rigorous inspections and testing to ensure it meets safety regulations for the storage and transport of compressed gases. The star marking signifies that the cylinder has a higher safety standard than those that do not have this marking, reflecting its compliance with specific regulations that allow for a decade of service before requiring another retest. Understanding this reinforcement of safety and compliance is essential for maintaining proper safety protocols in handling compressed gases.