Hydraulic pressure test of heat exchangers
Hydraulic pressure test of heat exchangers
(OP)
I hope this is the right forum. If not, please direct me to the right one.
I have a large motor with air-to-water heat exchanger where the water flow pressure is 4.5 bar. We intend to overhaul and conduct a pressure test on this cooler to check for any leaks.
What is the recommended test pressure and test duration ? I was informed the test pressure is 1.5 times the rated pressure and the duration is 24 hours (since liquids are compressible and it takes a long time for the pressure to drop due to leaks). Is this right ? Is there any NEMA or other standards for this test ?
I have a large motor with air-to-water heat exchanger where the water flow pressure is 4.5 bar. We intend to overhaul and conduct a pressure test on this cooler to check for any leaks.
What is the recommended test pressure and test duration ? I was informed the test pressure is 1.5 times the rated pressure and the duration is 24 hours (since liquids are compressible and it takes a long time for the pressure to drop due to leaks). Is this right ? Is there any NEMA or other standards for this test ?





RE: Hydraulic pressure test of heat exchangers
RE: Hydraulic pressure test of heat exchangers
liquids are not as compressible as you might think - air is much more compressible
pneumatic tests are (in my mind) potentially more destructive to equipment and personnel than hydro tests
Steven C
Senior Member
ThirdPartyInspections.com
RE: Hydraulic pressure test of heat exchangers
I meant to type exactly the opposite - that liquids are not compressible - and missed the 'not'.
Is there any standard or test procedure for this test ?
RE: Hydraulic pressure test of heat exchangers
Steven C
Senior Member
ThirdPartyInspections.com