Request for a construction plan for changing convective tube joining from expansion fitting to welding in the upper drum
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As the title suggests, I’ve never worked on a plan of this kind before and really don’t know how to proceed. I’m seeking advice from all of you experts
To change from expansion joining to welding, just expand first and then weld! When expanding the tube, simply remove the gap between the tube and the tube sheet! After that, welding can be carried out in accordance with JB/T1613!
When one end of the pipe is welded and the other end is expanded, welding should be done first followed by expansion. The welding of pressure components in boilers shall comply with the relevant provisions of the current standards, namely the \"Regulations on Safety Supervision of Steam Boilers\", the \"Regulations on Safety Supervision of Hot Water Boilers\", the \"Technical Requirements for Welding of Pressure Components in Boilers\", and the \"Methods for Testing the Mechanical Properties of Welded Joints of Pressure Components in Boilers\".