Pressure for the airtightness test
Thread Content
For a device with a design pressure of -0.1 MPa, what pressure should be used for the airtightness test? ? ?
Conduct a airtightness test at the design pressure; since your container is under negative pressure, the test should be carried out at positive pressure.
The vacuum vessel is pressure-tested using internal pressure. The minimum pressure for the hydraulic test of vacuum vessels is determined by the following formula: pT=1.25p. The minimum pressure for the pneumatic test of vacuum vessels is determined by the following formula: pT=1.15p. Where: pT – test pressure, in MPa ； p — design pressure, MPa.
The minimum value of the pneumatic test pressure is determined using the following formula: it is pT=1.1p, not pT=1.15p
The airtightness test is not a pressure test; for the airtightness test, 1.0 times the design pressure is used
The design pressure is -0.1 MPa; as long as it is airtight and leak-free, that’s sufficient
0.1MPa...........
Conduct a airtightness test at an internal pressure of 0.1 MPa.
Conduct a airtightness test at an internal pressure of 0.1 MPa