Heat exchanger cladded tube sheet
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I am designing a heat exchanger with a stainless steel cladding structure for the tube sheet; what are the technical requirements for arranging these cladding layers? I would appreciate guidance from those with experience. Thank you so much!
http://bbs.hcbbs.com/redirect.php?tid=84756&goto=lastpost Here is the original poster’s post
I’ve been in the workshop; previously, manual surfacing was used, but when the area to be treated was large, the results weren’t very good – there were layers of material and many pores. Nowadays, counter-electrode surfacing is more commonly used, but it still causes significant deformation, and hydraulic leveling is required after welding
A surfacing transition layer is applied, followed by heat treatment, and then a stainless steel layer is surfaced. Appropriate surfacing methods and surfacing sequences should be used for surfacing in order to minimize the deformation of the tube sheet. It seems there are no regulations regarding heat treatment; this is probably experience derived from practical applications.
Welding and cladding are generally used, requiring welders to have the appropriate qualifications; penetrant testing is usually carried out after welding.
Agree with what was said on floor 7. One more thing to add: a weld overlay process evaluation should be conducted before carrying out the weld overlay process
Why not choose explosive bonding? This way, the effect is better!
I’m still a complete novice when it comes to material processing; I’ve just started learning it
The expansion joint method can still be used as a substitute for welding, with good results, especially for those tube bundles that consist of relatively thin tubes