When conducting a safety valve test, what is the acceptable popping pressure to achieve?

When conducting a safety valve test, the acceptable popping pressure is typically set at a level that ensures the safety valve will operate properly to release excess pressure from a system. The correct choice indicates that the valve should open at a pressure that is at least 75% of the set pressure for which it is designed. This high threshold ensures that the safety valve is responsive and capable of preventing overpressure situations that could lead to equipment failure or safety hazards.

A popping pressure of at least 75% aligns with industry standards and ensures that the valve is functioning effectively in its safety role. Setting the popping pressure below this level could compromise safety, as it may not allow enough pressure buildup to trigger the valve appropriately, while exceeding this threshold would ensure that it operates within a safe range before reaching critical pressure levels. This is vital for maintaining system integrity and worker safety in various applications.