If a binary includes a White Dwarf, gas pulled from a companion onto the White Dwarf's surface can fuse violently in a flash called a nova.

Flash fire - the combustion of a flammable gas or vapor and air mixture in which the flame propagates through that mixture in a manner such that negligible or no damaging overpressure is generated.

The liquid in the pipeline under certain conditions and partially vaporizes into gas state, bubble, formation of gas-liquid two-phase flow which is the process of flash.