After the heat exchanger is overhauled, pressure testing is carried out on the tube side to detect leaks
Thread Content
Flue gas for acid production: professional cleaning of the tube side of heat exchangers during overhauls, carried out using high-pressure water guns; after cleaning, leaks in the tube side must be identified and sealed off at the upper and lower ends. We use pressure application to the pipe system; that is, we use air from an air compressor. After blocking the lower end, we also block the upper end. There is a pressure gauge, and when the pressure rises and stays stable, it indicates no leaks. Do anyone else have other methods?
The risk of cleaning heat exchangers in the acid production conversion process is extremely high, as the tubes are very prone to leakage. The supervisor’s pressure reduction time is too long, but it provides a higher safety factor. You can also try applying pressure to the entire shell side; this method allows for the detection of tube leaks. Its advantage is that it requires less work, but the downside is that minor leaks may not be detected. Furthermore, the heat exchangers that have been cleaned tend to leak severely; even after repairing them and sealing off the leaking tubes, they still represent a significant hazard during production. It is recommended to replace them, especially given the strict environmental regulations in place. Finally, I’d like to ask what level of pressure you use when suppressing it?
What are the risks of cleaning heat exchangers? We all use high-pressure water guns with tap water for cleaning; we don’t use any chemical agents. Applying pressure to the entire shell side is completely pointless; even if there is a leak, it can only be repaired by welding from the outside. The most important thing is to apply pressure using plugs; plug each pipe one by one, and seal the upper and lower parts of the leaking pipes, so that gas leakage will be prevented. Pressure control isn’t that strict. How do you guys suppress the managers?
Generally, the shell side is pressurized. . . . .
Is shell-side pressurization intended to prevent external leakage? Is it still a leak? If the pipeline leaks, the exhaust emissions will exceed the limits
American VIP Company has a device that can detect leaks in heat exchange tubes by analyzing sound.
Use a fake hat to apply pressure from the shell side.
I really don’t understand what the purpose of applying pressure in the shell side is
Whether it is pressurization on the shell side or on the tube side, it is used to detect leaks in the tubes; the only difference lies in the amount of work required for pressurization.
Pressurizing both the shell side and the tube side is used to detect leaks in the tubes; the only difference lies in the amount of work required for pressurization! But the heat exchanger is a device operating at atmospheric pressure, so the pressure applied to it should be controlled!