It appears that the problem is with the mismatch / ovality and not with the root gap, with 1.5 or 2.0mm root gap or equal to dia of filler wire used (which normally we recommend on paper) you can achieve a good weld penetration, but practically, when you start welding with a 2mm root gap and finishes 180° the root gap will close to zero due to distortion during welding the other half.
That is why most welders prefer wider root gap than recommended, and it should left to welder judiciously (of course all welders can’t be same and depends on their skill), you can try out few joints with various root gaps.
You can overcome with it by using pipe clamps for fit up.
From: firstname.lastname@example.org [mailto:email@example.com] On Behalf Of Bathula Anil Kumar
Sent: Sunday, June 22, 2008 3:17 PM
Subject: [MW:880] clarification reg root gap
My Name is Anil Kumar working as a Quality Control Inspector in
I request you to kindly suggest me what is the root gap for the above said materials and what are the other possibilities for the above said repairs and the corrective action required to be taken for the same.
I thank you one and all very much for creating such a beautiful group
Bathula Anil Kumar
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