The condenser is leaking; I can’t detect any pressure, neither air pressure nor water pressure. What should I do?
Thread Content
This post was last edited by zbf7103 on 2011-3-2 07:18. The condenser is leaking; neither air pressure nor water pressure can be used to detect the issue. What should I do? The possibility of a wrong diagnosis is very low, as water is used for cooling titanium tetrachloride, and a leak would cause a reaction. Dear teachers, internal leakage in such condensers does not occur through gaskets, and internal leakage is inevitable; this is because water (with high pressure in the tube side) entered the feed stream (with lower pressure on the shell side), causing a reaction that turned the feed stream milky white, eventually leading to blockage of the shell side.
What medium is the condenser you are referring to? What are the design parameters of the equipment? What is the water pressure and air pressure? You can choose either eddy current technology or ammonia permeation methods for testing
Reply 1# zbf7103: The method is incorrect
As mentioned by the poster in post 2, there is another question: how do you determine internal leakage? What if you make a wrong judgment?
First, test with one type of dielectric; if there is a leakage, it indicates a leak. It’s leaking; just have it repaired.
There is nothing that cannot be done; only things that cannot be done well... Please, the original poster, proceed with care and attention based on the actual circumstances – I’m sure it can be done successfully!
Is it the case that there is no leakage in the pipe itself, but rather internal leakage in the gasket causes cross-contamination? Then there definitely will be no leakage when pressurizing it.
Agree with the opinion from the 6th floor; it seems that the poster inferred the occurrence of an internal leak indirectly by checking whether the cooling water was acidic or by testing for Cl ions in the water. Personally, I don’t think it must be a leak inside the condenser; it could also be a leak at the connectors or similar areas, or indirect contamination. Titanium tetrachloride is very dangerous when it actually leaks. It is recommended to conduct pressure testing more thoroughly, on both the tube side and the shell side, to check the pressure retention. PS: The most reliable way to check for leaks in welded steel pipes at the time of delivery is by applying water pressure; the same method is used to check for leaks in boilers as well.
Coolant is filled on one side, and a detector is used from the outside to check for leaks; this method is quite sensitive and can detect even minor leaks. Or test it with a helium mass spectrometer leak detector.
Reply to 1# zbf7103: With the system stopped, replace the contents inside the condenser completely, remove the end caps on both sides, connect steam to the shell side, and check whether there are any leaks in the tubes. If steam is found in the tube, this tube can be welded shut. This is how we test for leaks in our factory.
It’s not very clear; in the case of a shell-and-tube condenser, an air pressure test can be used to check for leaks. By performing a pressure test on the shell side after removing the end caps, if there are no leaks, it’s likely that the judgment was incorrect.