Tsted a system with air and it leaked. But with water it passed
Tsted a system with air and it leaked. But with water it passed
(OP)
Hi-
Was wondering if this was possible. We have a water cooled system made up of SS fittings. We tested it in the shop with our pneumatic system using a custom adapter to make the connection. Well it leaks in a few places. The vendor who provided us with the system claims that he tested it, with water, at a much greater pressure and there were no leaks. Is this possible? And Why?
thanks-
Was wondering if this was possible. We have a water cooled system made up of SS fittings. We tested it in the shop with our pneumatic system using a custom adapter to make the connection. Well it leaks in a few places. The vendor who provided us with the system claims that he tested it, with water, at a much greater pressure and there were no leaks. Is this possible? And Why?
thanks-





RE: Tsted a system with air and it leaked. But with water it passed
BTW, good dish soap, like Joy, Palmolive, etc. makes as good a solution as the pricy "Snoop". Save the Snoop bottles and refill them with 'homebrew' solution.
RE: Tsted a system with air and it leaked. But with water it passed
From "BigInch's Extremely simple theory of everything."
RE: Tsted a system with air and it leaked. But with water it passed
Patricia Lougheed
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RE: Tsted a system with air and it leaked. But with water it passed
Using Helium or Hydrogen for a bubble-test is half-again to 10X more sensitive. And using them for a Tracer-Gas, and chasing the leakage with a gas analyzer is the "Gold Standard" for leak detection -- more than 100X as sensitive as air or hydro.
RE: Tsted a system with air and it leaked. But with water it passed
RE: Tsted a system with air and it leaked. But with water it passed
Cl2-F2-C 2-chloro, 2-fluoromethane[R11] Cl3-C-C-F3 trichloro-trifluoroethane[R113a] vs. H2O.
What's happening is that the Freon is a 'tracer gas' and your detector can find VERY small ammounts of it comming out of your lines. Makes for a stringent test.
RE: Tsted a system with air and it leaked. But with water it passed
RE: Tsted a system with air and it leaked. But with water it passed
From "BigInch's Extremely simple theory of everything."
RE: Tsted a system with air and it leaked. But with water it passed
RE: Tsted a system with air and it leaked. But with water it passed
meaning what? how big a leak, how many?
TTFN

FAQ731-376: Eng-Tips.com Forum Policies
RE: Tsted a system with air and it leaked. But with water it passed
It leaked with air, but not with water.
So, the bottom line is, it leaked.
I think you need to find where it leaked the air, and fix the leaks.
Regards,
SNORGY.
RE: Tsted a system with air and it leaked. But with water it passed
Duration of test, test pressure and surface tension of water can provide clues as to why the hydrotest passed and the air test failed.
RE: Tsted a system with air and it leaked. But with water it passed
It might have passed. No real reason to doubt him unless you've had issues before.
But then he took it off the test stand, packed it up and loaded it on the truck, shipped it, unloaded it, unpacked it, re-installed it on the final assembly (or second test stand) at your place.
For small diameter screwed tight fittings? That's going to create many potential leaks. One new leak for each non-welded mechanical fitting.