Did you know to exclude the exit pipe fitting in your PSV outlet pressure drop calculations if your PSV discharges to atmosphere?
If you have performed an outlet pressure drop calculation for a PSV relieving to atmosphere, you may have noticed that often a significant portion of the pressure drop is contributed by the exit pipe fitting. This is because the equivalent resistance of the fitting is high relative to a typical length of pipe.
- Hooper, W. (1981, August 24). The 2-K Method Predicts Head Loss in Pipe Fittings Chemical Engineering, 97.
- Darby, R. (2001). Chemical engineering fluid mechanics (2nd ed., pp. 213-214). New York: Marcel Dekker.