What is required to mark cylinders that have passed the Proof Pressure Method?

Marking cylinders that have successfully passed the Proof Pressure Method is essential for maintaining safety and compliance in the handling of pressurized gas cylinders. The correct procedure requires that each cylinder be marked with specific information to indicate its test status.

The marking must include the Retester Identification Number (RIN) and the test date, which provides a clear record of when the cylinder was last tested for safety. Additionally, the inclusion of the letter 'S' signifies that the cylinder has undergone the Proof Pressure Method, a specific testing procedure used to ensure the integrity and safety of the cylinder under pressure. This combination of information alerts users about the cylinder's compliance with safety standards and its suitability for use.

This thorough marking system helps prevent accidents by providing crucial information to anyone handling the cylinder, ensuring they are aware of its most recent testing and its pass status. Thus, marking the cylinder correctly is vital for safety and regulatory compliance within the industry.