What is the purpose of pressure testing?
To aid in testing, Test Pressure and Hold Period can be combined into a rate of change (ROC). For example, where the Hold Period = 10min and the Allowable Pressure Loss = 30psi, the Average Allowable ROC = 3psi/min. That is, if the average rate of pressure change during the 10min Hold Period =< 3psi/min, then the hold and allowable loss component of the test specification will have been achieved.
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