Regarding heat exchangers and air-cooled system pressure testing
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For heat exchanger and air-cooling pressure testing, I would like to ask what is the acceptable pressure drop? Is there no room for any reduction in pressure at all?
Visual inspection: The pressure gauge must not show any drop in pressure
A pressure drop indicates the presence of a leak, whether it is in the tube bundle, valves, or elsewhere; when the temperature remains constant during pressurization, the pressure should not decrease
Is it that strict? Can it really be achieved in practice? I think the feasibility is quite low
This requires calculation using a formula: the pressure and temperature after stamping are equal to the pressure and temperature after holding the pressure. The process issue lies in the observation accuracy of the table, which often affects the errors generated by the calculations.
Formulas are, after all, theoretical concepts; I wonder whether, in practice when applying pressure, it’s really impossible to have any drop in pressure at all
During pressure testing, it is required to maintain the pressure for 30 minutes without any leaks or pressure drop.