All pressure relief devices must be designed to work effectively under what condition?

Pressure relief devices are critical safety components in fuel-oil piping and storage systems. They are designed to prevent excessive pressure build-up within tanks or piping systems by automatically venting excess pressure. Therefore, these devices must effectively operate under conditions of high pressure build-up to ensure the integrity of the system and protect against catastrophic failures.

High pressure can occur due to factors such as thermal expansion of the stored liquid or a malfunction in the system. In such scenarios, if the pressure relief device functions correctly, it will release pressure to maintain safe operating conditions, thereby preventing potential accidents like explosions or ruptures.

While high temperatures, controlled environments, and emergency conditions are relevant considerations in the overall design and operation of such systems, the primary purpose of pressure relief devices is specifically to manage and alleviate excessive pressure, making the condition of high pressure build-up paramount for their effective operation.