Welding of heat exchange tubes to tube sheets
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What type of weld is used for welding the heat exchange tubes to the tube sheet? Previously, all processes were classified as Category D, but now some say they should be classified as Category C. I believe that the \"joints where the flange is connected to the shell or nozzles\" specified for Class C welds in GB150 is not applicable to the welds between the heat exchange tubes and the tube sheet. Instead, the tube sheet should be considered part of the shell and thus classified as Category D. How do the other experts understand it?
This post was last edited by fzujunru on 2016-8-22 at 15:10. What type of welds are the welds between the heat exchange tubes and the tube sheet in 151? What is the basis? http://bbs.hcbbs.com/thread-631476-1-1.html (Source: Haichuan Chemical Industry Forum) There are various opinions on this, but from a design perspective, the classification of welds is mainly related to non-destructive testing. For the inspection of welding joints in heat exchange tubes and tube sheets, design documents usually specify specific requirements, typically PT