Superimposed Backpressure

Definition(s)


Superimposed Backpressure

Static pressure that exists at the outlet of a pressure-relief device at the time the device is required to operate.

  • NOTE: It is the result of pressure in the discharge system coming from other sources and can be constant or variable.

Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards