Airtightness and vacuuming
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I would like to ask fellow sailors: After the system’s airtightness test is successful, is it still necessary to conduct a vacuum pumping test?
It depends on what kind of system you have; if normal production operates under a vacuum system and your system has strict requirements regarding oxygen； Then a vacuum test is required ；
If the system is not under reduced pressure, there is no need to evacuate it after achieving airtightness.
Airtightness testing is mainly used to check whether the container leaks, while vacuum pumping tests are intended to assess the effectiveness of vacuum creation. You think, what if the container doesn’t leak, but there’s a problem with the vacuum pump itself?
It depends on what system is used; a positive pressure system isn’t necessary. In the case of a vacuum system, we use He gas for testing, and there is no need to create a vacuum.
It depends on whether your device requires it; airtightness testing is used to check for any leaks in the system. If the airtightness is good, then there should be no problems with vacuum levels as well.
Generally, after the airtightness test is passed, there is no need to evacuate the vacuum anymore!
Positive pressure can determine the location of the leak, while vacuum can detect the extent of the leakage
If it’s a pressure device, it shouldn’t be necessary then.
In the future, please state the questions clearly, as this will help with solving them and providing answers.