How often are cylinders constructed of composite materials required to be hydrostatically tested?

Composite material cylinders, commonly used for storing compressed gases, are subject to specific testing requirements to ensure their safety and integrity. The correct intervall for hydrostatic testing of these cylinders, typically mandated by regulations, is every 3 years. This frequent testing schedule is crucial because composite materials can degrade over time due to factors such as exposure to heat, pressure fluctuations, and environmental conditions.

Regular hydrostatic testing involves filling the cylinder with water to check for leaks and to ensure that it can withstand the designated pressure without failure. By adhering to this 3-year testing requirement, fire service personnel can better manage the risks associated with the use of composite cylinders and ensure that they remain safe for operations.

While the other options suggest longer testing intervals, they do not align with the specific regulations established for composite materials, which prioritize a more frequent assessment to safeguard against potential hazards.