Leak detection in vacuum systems
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I would appreciate some guidance: during a pressure test of a vacuum system, if it’s not possible to maintain the pressure, how can leaks in the pipes and equipment be identified quickly?
Listen to the sound. ---------------------
It must be a bit difficult to hear this “sound” clearly in the factory, right?
Fill the system with water and then create a vacuum; if bubbles are observed coming out, the leak location can be determined.
If the device is not sensitive to water, use water for pressure testing to check for leaks; if it is sensitive to water, use air pressure (make sure to use a pressure gauge) for testing. Use detergent foam to check for leaks at welds and flanges, but be sure to keep the pressure within the specified limits
The issue you're referring to is probably the testing after the commissioning of new equipment or after equipment maintenance. Vacuum system: Vessels, pipelines, etc. can be tested under positive pressure, usually through airtightness testing, followed by checking for leaks using soapy water. A watertight one will work too, but it uses too much water, so it’s unnecessary.
What you are doing is system leak detection, not system pressure testing. We cannot ignore the purpose of work