Low methane airtightness.
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When performing airtightness testing at low pressure, is the tower section at high pressure used for airtightness testing as well?
Please ask an expert to answer; looking forward to it:):L
We generally manage to cope with work pressure
Reply to 1# Nine-Tailed Fox: That’s necessary; use medium-pressure nitrogen for pressurization and displacement, while simultaneously conducting a gas-tightness test.
It must be airtight, and the pipelines attached to the tower as well as the manway areas need to be thoroughly inspected; this is especially true for higher locations, as it will be very troublesome to carry out repairs once the system is put into operation and process gas starts flowing into the facility.
It’s necessary to use low-pressure nitrogen first, then compress that nitrogen to produce medium-pressure nitrogen, and finally use the medium-pressure nitrogen. Finally, pressurize with high-pressure nitrogen gas until the system reaches normal pressure. High-pressure nitrogen is not required; a flash vapor compressor can also be used for pressing. During inspection, all flanges and manholes must be checked, with extra care being taken at higher locations.
For airtightness, we generally achieve around 50% pressure; higher pressures are usually addressed by using process gas to detect leaks.