How often must reusable refrigerant containers under high pressure be hydrostatically tested?

• A. Every 2 years
• B. Every year
• C. Every 3 years
• D. Every 5 years

Answer: (D)

Reusable refrigerant containers that hold high pressure must undergo hydrostatic testing every 5 years to ensure their structural integrity and safety during use. This testing is critical because it evaluates the container's ability to withstand the pressures associated with refrigerants and helps to identify any potential weaknesses or defects that could lead to leaks or catastrophic failures. Regularly scheduled hydrostatic testing is a regulatory requirement, as it ensures adherence to safety standards and helps prevent accidents in both residential and commercial refrigeration applications.

The 5-year interval is established by the relevant safety and regulatory guidelines, which aim to provide enough time to monitor and assess the durability of the containers while also ensuring that they are not used beyond their safe lifespan. This frequency balances the need for safety with practical considerations for maintenance and availability of the containers in the field.