Fixed tube sheet heat exchanger
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The data shows that in a fixed-tube-sheet heat exchanger, the tube sheet is welded to the shell side, and the tube bundle is welded to the tube sheet; since everything is welded together, how can the tube bundle be removed for inspection and maintenance? How can something that is welded be taken apart? If the tubes are removed one by one, the tube sheet is welded on the shell side; then how is the tube sheet removed, and how can the shell side be cleaned if the tube sheet is not removed? This question might not be very meaningful, but it has been bothering me for two years. Please advise, thank you
The tube bundle of a fixed-tube-sheet heat exchanger cannot be removed for inspection or maintenance. Floating head type and U-tube type are acceptable.
The shell side uses materials that are easy to clean and do not tend to form scale, such as sulfuric acid on the shell side and water on the tube side
If one individual one is damaged, simply block it with a plug
With this understanding, some people say that the restraint can be removed as a whole, which leads to my question
I immediately thought that the components were joined by welding, but some people said that during inspection and maintenance the tube bundle could be removed entirely, while others said that the tube sheet and shell were connected by flanges rather than welding, which is why there are doubts
Thank you. What you mean is that the shell side should be kept free from scaling or the accumulation of dirt, and it cannot be disassembled for inspection or maintenance
If one individual one is damaged, simply block it with a plug
The tube bundle of a fixed-tube-sheet heat exchanger cannot be removed, while that of a floating-head or U-tube heat exchanger can be removed. A fixed tube sheet tube bundle refers to the middle section, where the tube bundle is replaced along with the shell, being made new, rather than the tubes being removed. If a pipe leaks, it can be plugged up or removed and replaced with a new one, though it’s quite troublesome.