Thought question 4: When expanding heat exchange tubes, under what circumstances is it necessary to use an expansion head?
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Thought question 4: When expanding heat exchange tubes, under what circumstances is it necessary to use an expansion head?
This post was last edited by Forgetting = Forgetting on 2019-8-19 09:20. 1. Corrosion mechanism of the material: crevice corrosion occurs. 2. The temperature gradient induces high constraint stresses in the tube-tube sheet assembly. The axial stress acting on the weld area is reduced through expansion bonding. 3 Whether it is a vibrating environment or one with cyclic stresses – expansion bonding helps to reduce the damage caused by cyclic stresses to the welds at the pipe ends. 4 The tube sheet is a composite type, which prevents stress-induced damage to the composite interface at the pipe ends during use
In many cases, strength welding is used along with expansion joints; when performing calculations for SW6, it’s necessary to choose strength welding only； You are asking when expansion joining is required. Is it necessary to use expansion heads for all expansion joints? Generally, is it the number of heat exchange tube holes on the tube sheet divided by 30?