Questions regarding the segmented structure of the shell in fixed-tube-sheet heat exchangers
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Section 7.4.6.5 of GB/T151-2014 provides the calculation formulas for segmenting the shell-side cylinder. However, the standard does not specify when this shell-side cylinder structure should be used, nor does it outline the advantages of adopting such a structure. I hope experts can help clarify this matter; I’m very grateful! !
This type of structure is generally not used; I’ve worked in factories for many years and have never encountered it once. This may be used in special situations, such as when there is a large temperature difference between the middle and the ends of a heat exchanger, or when there are significant differences in corrosion levels; in order to save material, a segmented design for the cylinder shell is employed
I haven’t designed anything like this either. It’s hard to come across, unless reinforcement with a large opening is used.
Thank you to those who replied above; I hope that those on the forum who understand this concept or have used this structure can help clarify it for me
You can try using SW6; when the pressure in the shell side increases, the stress levels at the ends of the cylinder where it connects to the tube sheet become quite high, so it is necessary to thicken those sections of the cylinder locally； Especially for large heat exchangers, thickening the entire cylinder increases costs, and the total weight of the container also increases
It is used frequently; it is applied when the stress in the gauge plate and the cylinder storage area exceeds the limit.
Is it necessary to assume segmentation when there is no expansion joint?