Airtightness pressure test
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I would like to ask everyone: How is the diagram for the airtightness and pressure resistance test created, and what standards are followed?
It is generally carried out in accordance with the fixed-volume regulations and GB150; the curves are the same as those used in hydraulic testing
Both the fixed-volume gauge and GB150 specify that the pressure should be increased slowly to a certain level during the pressure test； Maintain the pressure for a sufficient time. How to understand: slow, enough?
How do various manufacturers define slow and sufficient?
Slow is easy to understand: it means that the pressure increases gradually. The amount of time required to maintain this pressure depends on the size of the equipment and the complexity of its structure, to allow sufficient time for checking the sealing quality; however, this time should be no less than half an hour.
Slowing down is for safety reasons, to minimize risks as much as possible. It’s enough; you have to use soapy water to check everything that needs to be checked, right?~~~
Maintain the pressure for a sufficient time, meaning all inspections have been completed.
Increase the pressure step by step; for example, raise it to one unit of pressure within 5 minutes, hold that pressure and observe, and if there are no issues, increase the pressure further. Repeat this process until the desired testing pressure is reached, then maintain that pressure for a certain period of time to check for any abnormalities
I’m hearing about the concept of a “air-tightness pressure test” for the first time; I don’t know what it means
For the airtightness test, don’t make it too complicated: gradually increase pressure, check for leaks at constant pressure, then release pressure – that’s all there is to it. Three lines.