How to calculate pressure in pipeline
How to calculate pressure in pipeline
(OP)
Hi all,
Could you please help me. How to calculate pressure in closed pipeline.
I have 8 km, 1" line fill with hydraulic oil. The pipe will be laid at 40m depth in the sea. I can calculate volume of Oil in the pipe, but how to calculate, how many liters of oil will need to increase pressure to for example 100 bar.
I need formula to show the connection between Volume and Pressure.
Thanks in advance
Regards
Could you please help me. How to calculate pressure in closed pipeline.
I have 8 km, 1" line fill with hydraulic oil. The pipe will be laid at 40m depth in the sea. I can calculate volume of Oil in the pipe, but how to calculate, how many liters of oil will need to increase pressure to for example 100 bar.
I need formula to show the connection between Volume and Pressure.
Thanks in advance
Regards





RE: How to calculate pressure in pipeline
You should be able to work out a formula from the above.
David
RE: How to calculate pressure in pipeline
You mean that, I need to know hydraulic oil compressibility. Probably the vendor can give me this info.
If I know how many liters I need, then I can calculate how many minutes my pump will running.
Regards
Dian
RE: How to calculate pressure in pipeline
Just to insure that we have the correct understanding of your problem, David and I too assume that your question was regarding only to do a pressure test on that pipeline and it was not at all related to finding any necessary pressure to flow some quantity of oil in that pipeline. Correct?
**********************
"The problem isn't working out the equation,
its finding the answer to the real question." BigInch
http://virtualpipeline.spaces.live.com/
RE: How to calculate pressure in pipeline
If you want to check longitudinal elongation due to pressure and evaluate extra-amount of oil to compensate it (very low in this specific case, but sometimes not trivial) you can use the formula below:
Epsilon = [(P*D)/(4*t*E)]* (1-2*Poisson)
Where :
Epsilon = longitudinal strain
P =applied pressure
D= pipe mean diameter
t = pipe thickness
E = Pipe Young Modulus
Poisson = Pipe Poisson's ratio
RE: How to calculate pressure in pipeline