How is an ASME approved safety relief valve tested at the factory?

An ASME approved safety relief valve undergoes testing procedures that typically involve both steam and hot water. This dual testing approach ensures that the valve operates correctly under actual service conditions it will face in the field. By initially testing with steam, the valve can be assessed for its response to pressure and temperature variations that occur in high-temperature situations. Following the steam test, hot water can be used to verify its operation at different pressures and confirm reliable performance in liquid service.

This method of testing is critical for validating that the valve will open and close at specified pressure settings and will effectively relieve excess pressure to prevent potential system failures. The comprehensive testing helps ensure safety, reliability, and compliance with the ASME standards. Other options focus on singular testing methods or compliance verification, which do not encompass the robust testing regime necessary for full certification and functionality of the safety relief valve.