Heat exchanger leak testing
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Which leak detection method is relatively simple for this type of heat exchanger?
Boilers and pressure vessels are required to undergo hydrostatic testing
It’s best to use a sink (vertical type), with gas fed into each tube; by applying pressure, bubbles will appear in the water, which indicates that that tube is leaking and needs to be sealed. It’s better if it doesn’t foam.
Insert the tube bundle into the shell; a dummy flange fixture is installed on the tube box. The shell side is filled with water and pressurized. By observing which hole at the front tube sheet has water flowing out, it can be determined which tube is leaking. Then, that hole as well as the corresponding other hole are sealed off using plugs, and this process is repeated~
Just fill the shell side with water under pressure; if one pipe leaks, it’s obvious which one it is, and all that’s needed is to seal it up.
Remove the head, install the pressure testing ring, apply water pressure to the shell side
The method for the boss on the sixth floor is effective and simple
Yes, since the workload involved in manufacturing the casing is considerable, a pressure of less than eight kilograms is used for each test; however, this can only detect larger leaks.