Hydrostatic test and sealing test
Thread Content
I have seen that many specifications mention hydraulic pressure tests and sealing tests, but one of the purposes of the hydraulic pressure test is to check the tightness. Is this the same as the sealing test, or does it target different test points? Or is it done differently? Is it possible to combine only one item?
The hydraulic pressure test laboratory tests the pressure-bearing capacity of pipes, generally using 1.5 times the design pressure test. The sealing test should be the legendary leakage test. Generally, the test is only done on pipelines transporting toxic and flammable gases. The pressure test medium is gas, and the test pressure is the design pressure.
If it is done by the equipment manufacturer, it usually only needs to do the water pressure test, and the air tightness test will be done if necessary. GB150 can be checked. After the equipment is installed, an air tightness test needs to be done. Check flange connection for leaks
Types of pressure tests include: 1. Strength and tightness test. If the strength test uses water, it is 1.5 times the design pressure. ； If it is a gas, it is 1.15 times, test time: The strength test lasts for 10 minutes and the tightness test lasts for 30 minutes. 2. Air tightness test, the test pressure is the design pressure. The medium is air. 3. Leakage test, the test pressure is the design pressure. The medium is air. 4. Leakage volume test, the test time is 24 hours, and the pressurization rate cannot be greater than 5%. The medium is air.
No, the test pressure of the hydraulic test is greater than the sealing test pressure, and the test media are different, one is liquid and the other is gas.
Both cannot be considered as one. Water pressure is a strength test, which has nothing to do with sealing. It is to check whether the pressure reaches a certain value and whether the pipe material can meet the design requirements, while sealing is to see whether the pipe leaks and whether it can meet the sealing requirements. Whether the pipeline or valve is qualified or not plays a key role in these two items. The other two test methods are also different. Different valves may have different test methods, some are the same, and some are different. This depends on the specifics. More details.