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chillboy (Chemical)
1 Feb 08 6:20
Dear Friends!
I want to study the basics of hydrotesting of pipelines and equipments, like how pressure raises inside a pipeline filled up with water though water is incompressible...
Can you suggest some website to enlighten me in this regard,
thanks in advance,
yours truly,
A.Thirumaran
dcasto (Chemical)
1 Feb 08 15:50
It can be a complex issue. But here's the first thing, water isn't incompressible and even if assumed to be, there is air in the lines that is compressible.
Now that you mind is opened, the search can begin.
IFRs (Petroleum)
1 Feb 08 21:03
Usually the lines are filled with water, then air pressure is applied through a fitting. Limiting the volume of air reduces the energy released if there is a catastrophic failure.
字串2
owg (Chemical)
3 Feb 08 6:18
The pipeline hydrotest that I remember best was the testing of a short jumper between a gas line and an oil line. It was a hot summer day and I filled the line with cold well water then topped it up to test pressure with a small injection pump. Then over the next period, I forget the duration required, I had to keep bleeding off the pressure as the water heated up in the hot sun. Probably not ideal but got the job done. HAZOP at www.curryhydrocarbons.ca
BigInch (Petroleum)
5 Feb 08 15:56
IFR, no air in the lines works best for a hydrotest test.
Find the bulk modulus of water over temperature (it doesn't vary much with pressure), compare the pressure adjusted volume of water at STP injected into the test segment with the radial expansion of the pipe vs its internal pressure and as the length and diameter of the pipe and the bulk modulus of the water change with temperature. Nothing else to it. http://virtualpipeline.spaces.msn.com 字串4
"We can't solve problems by using the same kind of thinking we used when we created them." -Albert Einstein
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