Our facility is undergoing major repairs, and I’m responsible for removing the heat exchangers. I’ve never done this before, so I need some guidance.
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1. In a floating-head heat exchanger, there is a component on the floating head called a hook ring; this hook ring consists of two semi-circles or something else that can be separated in the radial direction, right? During core extraction, the tube bundle is pulled out from the side of the tube box; as can be seen from the diagram, the hook ring must be removed first. But it hasn’t been disassembled before, so I really have no idea how to do it. 2. Core puller – according to the experienced workers, I still can’t imagine what it looks like or how it works. In the past, for the smaller U-tube types, we used winches suspended from the upper layer to pull them. . I’d like to see pictures of core pullers, those that use winches for core extraction. 3. For the pressure testing of floating-head heat exchangers, different methods are used depending on whether the pressures on the shell and the tubes are different; what about when the pressures are the same? If there are any other things I should be aware of, please let me know. Thank you. Are there any other better specific materials I can look at? I’m piecing things together now, finding whatever I can think of. . The other technicians are also busy. There’s no time to teach me
This post was last edited by 68ZCW on 2012-4-2 at 12:03. 1. A loop is composed of two semi-circles and can be decomposed in a radial direction; the loop must be removed first. . 2. Core pulling is similar to U-tube core pulling; there is little difference between them. 3. Pressure testing of floating-head heat exchangers requires specialized pressure testing fixtures. Specific information can be found in plenty of introductions by searching on this site.
If the hook and loop can be removed by pulling out the core, then what is its purpose? Based on the dimensions shown in the drawings, the outer diameter of the hook loop cannot pass through the main body. Thank you
I was wrong just now; the hook must be removed first. :lol
Haha. Mm-hm. I think the same. Thank you. . . .
1. In a floating-head heat exchanger, there is a component on the floating head called a hook ring; this hook ring consists of two semi-circles or something else that can be separated in the radial direction, right? During core extraction, the tube bundle is pulled out from the side of the tube box; as can be seen from the diagram, the hook ring must be removed first. But it hasn’t been disassembled before, so I really have no idea how to do it. When installing the hook rings, they are usually placed vertically; before removing the tube bundle, the hook rings need to be folded first. 2. As for the core-pulling machine, although I heard from experienced workers about it, I still can’t visualize what it looks like or how it operates. In the past, for the smaller U-tube types, we used winches suspended from the upper layer to pull them. . I’d like to see pictures of core pullers, those that use winches for core extraction. There are pictures of core pullers in the forum; give them a search – it’s quite clear. 3. For pressure testing of floating-head heat exchangers, different methods are used depending on whether the pressures on the shell and the tubes differ. What about when the pressures are the same? You can first find the manufacturer’s documentation for the device, which includes the test pressure for it. It is also possible to follow the parameters on the nameplate; they are usually provided. In practice, if there are things you don’t understand, ask your instructor or workers more often – don’t be afraid to seem awkward about it
I’d like to add that for heat exchangers, the pressure testing is carried out separately for the tube side and the shell side; it doesn’t matter if the pressures are different. A fake floating head is used for testing the shell side
Is the poster planning to shut down the machine to clean it? If it’s a shell-and-tube heat exchanger, I have suitable chemical cleaning agents available; there’s no need to disassemble it, which is much more convenient and the results are also excellent. If you are interested in learning more, feel free to contact me at 18660091085. I hope this can help you.
If you encounter problems such as leakage or corrosion in heat exchangers during maintenance, feel free to contact us; we specialize in on-site inspection, repair, and renovation of heat exchangers! Phone: 13889505498
We use chemical cleaning methods for major repairs. Could it be that your screws need to be replaced? http://zbxyzjb.com.h003.ctrl.net.cn/uploadfile/20123129024828.jpg Core puller