At what pressure should the pressure control device be tested in addition to 150 psi and 90 psi?

The correct pressure at which the pressure control device should be tested, in addition to the standard tests at 150 psi and 90 psi, is 250 psi. This testing pressure is often selected because it represents a pressure that is higher than typical operating pressures for many systems but still within a range that allows for safe testing without risking damage to the equipment.

Testing at 250 psi ensures that the pressure control devices can handle conditions that are higher than usual operational levels and verifies that they will perform correctly under overpressure scenarios. This is critical for safety and reliability, as pressure control devices must function effectively to prevent system failures or hazardous situations.

Values such as 300 psi, 350 psi, and 400 psi are typically considered too high for routine testing. Such levels may put undue stress on the components of the device and may not be necessary for the structural integrity validation that routine testing requires. Therefore, 250 psi is the most appropriate choice to ensure both safety and functionality within realistic operating conditions.