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  1. Husaam

    Rejected PQR for Tube-to-Tubesheet Welding Procedure

    Tubesheet material SA266 Gr.4 (50mm) and the tubes are SA 179. Really appreciate all of your comments.
  2. Husaam

    Rejected PQR for Tube-to-Tubesheet Welding Procedure

    Thanks all for the responds. We are qualifying, Process: GTAW Tube diameter/thickness: 19.05mm OD/ 2.11mm 45 degrees groove with the tubes expanded before welding 1.6 filler with two passes We are suspecting that the narrow groove and the fact that the tubes are expanded contributed to the lack...
  3. Husaam

    Rejected PQR for Tube-to-Tubesheet Welding Procedure

    Dears, We performed welder qualification mockups for tube-to-tubesheet welding procedure. 15 mockups for three welders (5 each). All of the mockups failed due to lack of penetration and lack of fusion defects as noted from the macro test. I would like your advise to determine how we can...
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