JohnGP,
Thanks for your thoughts. Pump is centrifugal and liquid flow enters the top via a pump recirculation line from bottom of the tank. I agree that it seems liquid will enter tank until vapor compresses to the dead-head pump pressure, which is about 60 psig. Thus, looks like there will be...
Consider a tank rated at 50 psig MAWP and containing a hydrocarbon at 50% level and heated externally such that the vapor pressure in the tank is about 10 psig. Not exactly a flash tank, but similar. The supply source (60 psig from pump) delivers hydrocarbon to the tank at elevated temperature...
