How is your seqence fit-up head to shell?
Any wrong you are findings?
DONE shell seam first then fit up head to its shell.
Wrong : Don’t carry out RT before mounting dish head or misalignment too big
1.Check ovality after rolling shell
2.F/U long seam shell
3.Check Ovality after welding shell
4.Carryout RT long seam
4.Comparable ovallity with inspection report head.
5.F/U Head to Shell with tolerance misalignment according to UW-33 ASME VIII Div.1
Yes, repair at T-Jinction probem also.