After fixing the issues with the equipment that is out of service, should a full system pressure test be conducted or just a partial one?
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Defect in the high-pressure heat exchanger: since there are no inlet or outlet valves on the heat exchanger, the system was shut down for purging and material removal, followed by the replacement of the heat exchanger. After the heat exchanger was replaced, a hydrostatic test was conducted on the tube and shell sides; no maintenance was carried out on the remaining pipelines and equipment in the system. May I ask if a full system pressure test is required at the start of operation? Do we still only need to test the heat exchanger and the inlet and outlet flanges? Is there a regulatory basis?
However, it’s best to give it a try, as thermal expansion and contraction during shutdowns can cause the bolts to loosen
It’s better to conduct a full pressure test; there are too many uncertain factors.
……What can make it work best? Should I give it a try or not? It would be good if this thing could have standards
For safety reasons, pressure testing is necessary; it works fine when the system is running normally, but who can say what problems might arise once it’s turned off and restarted?
The question is what steps need to be taken for safety reasons. For example, when a device stops operating urgently and then starts up again, generally, there is no step of pressure testing, right?
Whenever conditions permit, try to conduct a full-scale pressure test
Well, yes, it depends on how long the stop lasts
Following the startup procedures, it is necessary to perform pressure testing on the entire system; there must be no reliance on luck
How can pressure testing be carried out if the connection flange does not come with front and rear systems? Generally, a full pressure test is carried out, with additional focus on testing the areas that have been modified
Is the high-pressure heat exchanger a device used in hydrogen-related facilities? Even for temporary parking, there are distinctions; not all temporary parkings allow you to skip the pressure testing step!