The liquid feed stream for the gas-liquid separator (or flush drum) shown in Figure consists of a

Question:

The liquid feed stream for the gas-liquid separator (or flush drum) shown in Figure consists of a hydrocarbon mixture. Because the pressure in the vessel is significantly lower than the feed pressure, part of the liquid feed flashes to form a gas phase. The hydrocarbons are flammable and somewhat hazardous. Discuss the process safety issues and propose an alarm/SISstrategy.