Dear Expert,
-- In P91 Material ( HRSG header Joint ) after pwht one joint is bulge.We did Preheating ,Welding , Post Heating,& PWHT in proper way.
Can anybody explain why this bulge occurs & remedy.
During fit-up inspection & weld visual inspection all round the joint is perfect but after PWHT pipe is bulge 140 mm away from the weld ment
Pic Attached
Regards,
Pradip
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