Is it considered qualified to fill an 80-square-meter reactor with nitrogen for leak testing?
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Our facility is equipped with a reactor with a volume of 80 cubic meters, and the operating pressure of the reactor vessel is 0.3 MPa. Before resuming operation after a shutdown, nitrogen is used for pressure testing at a pressure of 200 KPa; after 24 hours, the pressure drops to 197 KPa. Is this considered a successful pressure test?
Not counted. . . The fact that there is no leakage at 0.2 MPA does not mean there will be no leakage at 0.3 MPA. . . Leak testing must be carried out under operating conditions. .
The test pressure was 200 KPa; after 24 hours, the pressure dropped to 197 KPa. The pressure drop is within acceptable limits, so increasing the pressure could be considered
Qualified: After temperature-related adjustments, the difference is within 5%
The pressure for the airtightness test is the design pressure.
First, you need to determine whether you need to conduct a strength test or a leak test. If a strength test is to be carried out using air pressure, the test pressure should be 1.15 times the design pressure. For the leak test, the test pressure must be equal to the design pressure. The pressure used in the current tests by the poster is even lower than the operating pressure, so such tests are ineffective.