Positive pressure leakage test during testing: The effect of humidity inside the container on temperature and pressure changes

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This post was last edited by Coffee Companion on 2019-4-30 at 22:37. I would like to ask fellow experts: During the positive pressure leakage test of containers (with compressed air or nitrogen as the filling medium), according to the leakage rate calculation formula: RL=△P*v/t, P2`=P2*T2/T1 (where P2 is the pressure at the end of the pressure retention period, T2 is the temperature at that time, T1 is the temperature at the start of the pressure retention period, and P2` is the corrected pressure). Due to temperature changes, it is necessary to adjust the pressure data at the end of the pressure retention period. If there is some water vapor inside the container, why doesn’t the increase in pressure keep up with the increase in temperature, resulting in a leakage rate that does not meet the requirements after the pressure is corrected? Since the container is not completely dry but contains some humidity, why is there a discrepancy between the increase in temperature and the increase in pressure? How to solve this problem: is it necessary to wait for the same temperature level to be reached in order to obtain valid pressure-holding data?