Seeking advice on system airtightness issues
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I would like to ask the experts: since a compressor is not available in high-pressure systems (20 MPa), it is not possible to achieve gas tightness. Can ammonia permeation (0.6 MPa) be used as a substitute? 100% flaw detection is carried out for all welds, primarily to verify the sealing performance of the flanges. The hydraulic system can handle an operating pressure 1.5 times higher without any problem. I checked the standards; there are no clear statements or requirements. (SH3501 TSGD0001 SHT3517, etc.)
It must undergo a high-pressure airtightness test
It must undergo a high-pressure airtightness test
Pipelines with such ultra-high pressure should have the requirements for construction and inspection taken into account from the design stage
The designs are completely unsound; they claim that hydraulics will suffice
If the device doesn’t have one, then one has to go out and borrow an air compressor. 20 MPa is indeed a high pressure; I’m not even sure if such a category exists
What device requires such high pressure? Is it LNG? ? ?
The pressure in the high-pressure system (20 MPa) is too high; without conducting a gas-tightness test, it is impossible to guarantee whether there will be leaks at the flange seals or whether the strength of the pipes meets the required standards. Ammonia permeation can only serve as a complementary method to the pressure test; it is also necessary to have the design team conduct a flexibility analysis of the piping system. This 20MPa high-pressure pipeline system is terrifying, no matter what medium is used.
The size of a system depends on its scale.