Definition(s)
Flashback
Phenomenon occurring in a flammable mixture of air and gas when the local velocity of the mixture becomes less than the flame velocity, causing the flame to travel back through the mixture.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standard
Flashback
Phenomenon occurring in a flammable mixture of air and gas when the local velocity of the combustible mixture becomes less than the flame velocity, causing the flame to travel back to the point of mixture.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards