Volume from pressure drop during hydrotest
Volume from pressure drop during hydrotest
(OP)
Hello
Wondering if there is a quick formula to calculate volume of water lost from a pipeline under hydrostatic test, given a known drop in pressure and total volume in system. Test medium is water.
Thanks
Wondering if there is a quick formula to calculate volume of water lost from a pipeline under hydrostatic test, given a known drop in pressure and total volume in system. Test medium is water.
Thanks





RE: Volume from pressure drop during hydrotest
RE: Volume from pressure drop during hydrotest
I know that if the line has air in it the calculation will be out, but I am only after a rough estimate, so will assume the line contains only water.
Thanks
RE: Volume from pressure drop during hydrotest
See also h
and htt
jt
RE: Volume from pressure drop during hydrotest
At 30oC, κ = 4.48 × 10-4/MPa
RE: Volume from pressure drop during hydrotest
RE: Volume from pressure drop during hydrotest
RE: Volume from pressure drop during hydrotest
according to my understanding there should be no water lost during hydro test
RE: Volume from pressure drop during hydrotest
Kudos for your accurate analysis of the basic, original question and the correct response. No hydrotest is valid or acceptable if it has to withstand water leaks.
Agreeably, the original question probably isn't worded or written correctly but, until it is, the answer is just as athomas has replied.
RE: Volume from pressure drop during hydrotest
Cheers for all your replies guys.
RE: Volume from pressure drop during hydrotest
I was hoping that someone would be able to provide you with a way that I could estimate how much volume that would be, but the number is vanishingly small.
David
RE: Volume from pressure drop during hydrotest
“Pipe Line Rules of Thumb Handbook” E.W. McAllister, Editor, 4th edition
Gulf Publishing Company, Houston, Texas
Appendix A, Page 127 & 128, Volume of Water Required to Fill Test Section
Equation and Sample Calculation are given in the Appendix.
Equation:
Vtp = V * Fwp * Fpp * Fpwt
Vtp = Gallons in section at test pressure
Fwp = Factor to correct for compressibility of water from 0 to test pressure
Fpp = Factor to correct for volume change in pipe from 0 to test pressure
Fpwt = Factor to correct for the change in water volume and pipe volume due to change in temperature from 60 to pipe and water temp.
This reference list out the equations for V, Fwp, Fpp, and Fpwt so it should answer your question.
RE: Volume from pressure drop during hydrotest
RE: Volume from pressure drop during hydrotest
Any other thoughts on this?
Thanks!
RE: Volume from pressure drop during hydrotest
Ramy El-zeiny
process Eng.
gulf of suez pet. co.
Egypt