I. Pressure test with gas as the medium: the test pressure is 1.15 times the design pressure.
Liquid as a medium of pressure test: test pressure for the design pressure of 1.25 times (but not less than 0.6Mpa), slowly rising to the test pressure, stabilized pressure for 10 minutes, and then reduce the test pressure to the design pressure, stabilized pressure for 30 minutes, no pressure drop and no leakage is qualified.
So the test pressure = 0.7 ÷ 1.15 × 1.25 = 0.76Mpa
Second, hydraulic test is the use of water pressure for static determination of rock deformation characteristics of a method.
Hydraulic test is a pressure test. When the pressure vessel is made, the newly installed container before the use of 3 or after maintenance, in order to test the container macro strength (whether cracks, whether deformation is too large) and sealing points and weld sealing, add an appropriate amount of water in the container.
Three, low-pressure test is the test sample into the test box (room), and then the box (room) within the air pressure down to the value specified in the relevant standards, and keep the specified duration of the test. Its purpose is mainly used to determine the components, equipment or other products in storage, transportation and use of low-pressure environment adaptability.
Expanded Information
Air pressure test and air tightness test
Air pressure test is the test of equipment or piping pressure strength.
1, the design pressure is less than 0.6MPa can be made pressure test.
2, the test pressure and holding time from the design drawings, generally 1.15 times the design pressure, holding pressure for 10 minutes.
3, the air pressure test to delineate the forbidden zone, unrelated personnel are not allowed to enter.
4, if the design pressure is greater than 0.6MPa must have design documents and construction units agree to be carried out.
5, if the design temperature is higher than the test temperature test pressure should be based on Ps = 1.5P [test temperature material shall be used stress] / [design temperature material shall be used stress]. Ps - test pressure P - design pressure
6, pressure test should be slowly rising pressure. Rise to 50% of the test pressure to start checking, did not raise the pressure 10% (test pressure) steady pressure for 3 minutes. Until the test pressure, stabilized pressure for 10 minutes. And then drop to the design pressure full inspection.
7, the main check equipment deformation pipeline leakage belongs to the strength test.
Gas tightness test is a test of equipment or pipeline leakage. Refers to the equipment holding or pipeline conveying flammable, explosive, toxic, hazardous substances must be done when the airtightness test. Test pressure for the design pressure can be. No leakage of blowing agent is qualified. Vacuum system in the pressure test after passing, but also according to the design documents should be 24 hours of vacuum test, pressurization rate of less than 5% qualified.
Baidu Encyclopedia - Hydraulic Test
Baidu Encyclopedia - Air Pressure Test