Leak test: Why is it necessary to reduce pressure by 10 minutes?
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During the leak test, the pressure is increased gradually and slowly. Once the test pressure is reached and the pressure is held constant for 10 minutes, all sealing points are inspected one by one by applying a neutral foaming agent; no leaks being detected constitutes a pass. Does \"stop pressure for 10 min\" mean maintain the pressure for 10 min? Why is it necessary to stop the pressure for 10 minutes?
Yes, “hold pressure for 10 minutes” means maintaining the test pressure unchanged for 10 minutes. The main purpose of stopping the pressure for 10 minutes is to test whether the sealing points can remain leak-free over an extended period of time. After the pressure is removed, the pressure inside the pipeline gradually reaches equilibrium. If there is no leakage at the sealing point during the 10-minute period without pressure, it can be concluded that this sealing point has good sealing performance, allowing it to be determined whether that area is satisfactory. It also helps to avoid safety hazards such as excessive damage to pipes and equipment caused by rapid changes in pressure. .
Maintain the pressure for 10 minutes; 10 minutes is roughly considered the inspection time as well