At what safety valve popping tolerance is the capacity set for pressures above 1000 psig?

In high pressure boiler systems, the safety valve popping tolerance is crucial for ensuring the protection of both the boiler itself and the surrounding environment. For safety valves set for pressures above 1000 psig, the commonly accepted standard for popping tolerance is 1% overpressure.

This means that the safety valve is designed to open and relieve pressure when the pressure exceeds the set pressure by 1%. For example, if a safety valve is set to a pressure of 1000 psig, it will start to open when the pressure reaches 1010 psig. This tighter tolerance is important in high pressure applications, where even small variations in pressure can lead to significant safety risks.

This standard helps minimize the risk of overpressure conditions that could lead to catastrophic failures or equipment damage, highlighting the importance of adhering strictly to these safety parameters in high pressure boiler operations.