Compressed or pressurised ?
Compressed or pressurised ?
(OP)
Anybody prepared to explain the difference between compressed and pressurised?
'Cos as everybody is keen to point out to me, you can't compress a liquid (well you can but not very much). But if we can't compress a liquid, how do we do hydraulic tests on boilers?
And please do not be afraid to state the obvious, as there appears to be a fundamental hole in my understanding.
Cheers
'Cos as everybody is keen to point out to me, you can't compress a liquid (well you can but not very much). But if we can't compress a liquid, how do we do hydraulic tests on boilers?
And please do not be afraid to state the obvious, as there appears to be a fundamental hole in my understanding.
Cheers





RE: Compressed or pressurised ?
"Compressed" is used when significant mass must be added to a system to increase pressure.
They are just words. I do work on a non-return hydraulic pump that the 0.4% compressibility of the hydraulic fluid is the controlling factor in the pump capacity. So what? When you are doing a hydrostatic test, of course the test liquid compresses some, but you use a large-volume fill pump and a small volume pressurization pump to make up the fluid compression and the pipe expansion. Again, so what? Just because both the fabrication being tested and the test fluid have some small amount of elastisticity, does not mean that a test can't be performed.
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
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RE: Compressed or pressurised ?
ISZ
RE: Compressed or pressurised ?
RE: Compressed or pressurised ?
"Pressurized" means under pressure.
"Compressed" means a change (reduction) in volume DUE (normally) to pressurization.
RE: Compressed or pressurised ?
ISZ
RE: Compressed or pressurised ?
ERRRRRRMMMMMMMMMmmmmmmm
Nope sorry..........you have got me there.