The existing VRU in a petroleum loading terminal has its absorber vapor outlet line traced. I was not sure of its requirement ( the unit is in Canada, maybe for winterization). the line currently has a steam tracing (1/2" copper tubinh using 150 psig steam) which I have to replace by Electric...
Does Pressure-Vacuum vent sizing depend on the inbreathing / Outbreathing sizing or evaporative losses. Since the roof floats on the liquid under normal circumstances, how do we size for initial filling and emptying operations.
Thx. in advance
Can a Back Pressure valve be designed on a condensate return line to prevent flashing in the line. There is a hotwell downstream on the valve at 0 psig. The condensate is generated by 150# steam @ 360 deg.F .
