Definition(s)


Conventional Pressure-Relief Valve

Spring-loaded pressure-relief valve whose operational characteristics (set pressure, closing pressure, and relieving capacity) are directly affected by changes in the backpressure.

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

Conventional Pressure-Relief Valve

Air required to combust the flare gases.

Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards 

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