Cylinder re-examination and testing frequency includes which interval?

Cylinder re-examination and testing frequency includes which interval?

• A. Every 8 years
• B. Every 4 years
• C. Every 10 years
• D. Every 12 years

Answer: (B)

Periodic re-examination and hydrostatic testing of gas cylinders are required to catch thinning walls, corrosion, or other damage before a cylinder could fail under pressure. Safety standards set a regular interval for this requalification so a cylinder is tested before significant degradation can occur. In this context, the standard interval is four years, which keeps the cylinder’s integrity within safe limits and updates its certification stamp with the next due date. Longer intervals, such as eight, ten, or twelve years, would allow potential defects to go unchecked for too long, increasing the risk of a dangerous failure.

Periodic re-examination and hydrostatic testing of gas cylinders are required to catch thinning walls, corrosion, or other damage before a cylinder could fail under pressure. Safety standards set a regular interval for this requalification so a cylinder is tested before significant degradation can occur. In this context, the standard interval is four years, which keeps the cylinder’s integrity within safe limits and updates its certification stamp with the next due date. Longer intervals, such as eight, ten, or twelve years, would allow potential defects to go unchecked for too long, increasing the risk of a dangerous failure.