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Issues regarding the welding of heat exchanger tube boxes, shells, and tube sheets

2017-07-18View Original

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Our company is planning to manufacture a new heat exchanger, with the requirement that all connections between the heat exchanger’s tube sheet, tube box, and shell be made by welding. However, the equipment manufacturer raised a question: since none of the materials are 15CrMoR, heat treatment is necessary after welding. Heat treatment is to be carried out after welding the shell to the tube sheet, while the tube box is to be treated separately. So, how should heat treatment be performed after welding the tube box to the tube sheet? I hope the experts here can give some guidance.

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