Water pressure
Thread Content
For the shell side of the test heat exchanger in our factory, when the test pressure was applied for the first time, the pressure dropped by 0.1; after pressurizing it back to the original level, the pressure remained stable for half an hour without any further drop. Is this because the tube is compressed, or is there some other reason? Please solve it!
This situation occurs frequently, usually due to leaks in the compression equipment, as well as residual air inside that fails to be completely removed; this air is compressed and its temperature rises, and once cooling occurs the pressure drops. As long as the test pressure is restored and does not drop again, that’s sufficient.
I agree with 2L’s view; the heat exchange tubes should not deform that much.
There is a process of pressure transmission. This phenomenon occurs because there is no voltage stabilization, and pressure holding starts instead.