Pipeline leak testing acceptance criteria
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I need some help: when it comes to the pressure testing for the acceptance of pressure pipelines, is the acceptance standard for leakage measured on an hourly basis or over a certain number of hours? It seems that none of the information I found provides detailed explanations; some sources state that the leakage is less than 0.25%, while others mention 133 Pa. Which one is the correct one?
Pressure testing of pressure pipelines should result in no leaks.