Definition(s)
Staged Flare
Group of two or more flares or burners that are controlled so that the number of flares or burners in operation is proportional to the relief gas flow.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards