How to calculate built up back pressure?
How to calculate built up back pressure?
(OP)
How to calculate built up back pressure when hot water relieves and flashes into steam in the discharge piping?
Relief Valve is 1/2"x3/4" with a set pressure of 1000 psig. The water temperature is 107°C.
Relief Valve is 1/2"x3/4" with a set pressure of 1000 psig. The water temperature is 107°C.





RE: How to calculate built up back pressure?
for a short tailpipe terminated to atmosphere one may presume critical flow (or calculate fluid speed / pressure drop) but considering the small size of the PSV probably that is not required,
for flashing liquids there are different models, see for example
https://www.cheresources.com/invision/topic/21654-...
but, as said, probably that is not required in this case.
RE: How to calculate built up back pressure?
RE: How to calculate built up back pressure?
at 107 C you are close to saturation line (atm) and considering the dt across PSV and piping possibly it's liquid (to verify)
RE: How to calculate built up back pressure?