Heat exchanger leak detection
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The shell-and-tube heat exchanger has dimensions of φ700×6000; it has been filled with water and pressurized to 0.4 MPa, yet no leaks were detected. I would like to ask everyone how to carry out a leak test?
Sure, are there any gaps? Ammonia leakage can be used; for the method, see Appendix of HG/T20584.
Should it be the tube side or the shell side that is checked? . . For the shell side, apply foam water at the pipe ends and welds; for the tube side, submerge it in water to check for any leaks first. . .
Should it be the tube side or the shell side that is checked? . . For the shell side, apply foam water at the pipe ends and welds; for the tube side, submerge it in water to check for any leaks first. . .
Should it be the tube side or the shell side that is checked? . . For the shell side, apply foam water at the pipe ends and welds; for the tube side, submerge it in water to check for any leaks first. . .
Water has been filled to full, and the pressure is being increased further to 0.4 MPa; air cannot be used for pressurization.
Remove the end cap, fill the shell side with water and apply pressure to determine which pipe is leaking; to inspect the welds, fill the shell side with industrial air and apply foam water to the weld areas
For routine pressure testing, the pressure is increased to 1.25 times the operating pressure, and the pressure is held for 30 minutes; if there is no significant drop in pressure, it is considered successful.
We all introduce nitrogen into the shell side and then spray soapy water on the head; if there is a leak, it’s easy to detect