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Whitephone
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Oil, Water or What?

09/29/2010 11:46 AM

This one is a question on semantics.

Which is the difference between hydraulic test and hydrostatic test?
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Anonymous Poster
#1

Re: Oil, Water or What?

09/29/2010 1:05 PM

In the static case there is no fluid movement obviously.
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Tornado
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#2

Re: Oil, Water or What?

09/29/2010 2:00 PM

I think the more correct term is "hydrostatic," but "hydraulic" is sometimes used as a synonym. This is not very desirable, because "hydraulic" also means other things.

Even if you test a vessel with oil (such as for vessels destined for halocarbon refrigerant service) it is still called a hydrostatic test.

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Holzfeller
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#3

Re: Oil, Water or What?

09/29/2010 2:37 PM

A hydrostatic test, as implied above, involves no flow. So it is a pressure test only. For example, a centrifugal pump rated at 16bar might be pressurized up to 24bar to ensure there are no leaks.

A hydraulic test might be better termed a performance test, so in this case the pump would be run to measure flowrate vs. pressure.
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Anonymous Poster
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Re: Oil, Water or What?

09/30/2010 2:54 AM

hi.....

  • Hydromechanics, the branch of physics that deals with forces acting upon & within fluids,liquids & gases.
  • Hydromechanics is divided into hydrodynamics, the study of fluids in motion(Hydraulic); and hydrostatics, the study of fluids at rest.
  1. Hydrodynamics, the study of fluids in motion
  2. Hydrostatics, the study of fluids at rest.

A liquid or gas flows from regions of high pressure to regions of low pressure, for example, when water is squeezed from a sponge .

so hydraulic test is used for flow rate, velocity, head etc

hydrostatic test is used for pressure measurements.
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