For how long must TC cylinders be recertified after their initial certification?

The correct answer is that TC cylinders must be recertified every 5 years after their initial certification. This requirement is in place to ensure the safety and integrity of the cylinders used to transport and store propane and other gases. Regular recertification helps to identify any potential issues such as corrosion, structural damage, or other defects that could compromise the cylinder's ability to safely contain pressurized gas.

By adhering to a 5-year recertification schedule, users can be confident that the cylinders are still suitable for continued use and comply with safety regulations. The designation of a shorter recertification period compared to the longer intervals associated with other types of cylinders reflects the specific safety concerns and operational standards for TC cylinders in gas handling.