indentation on RT film???
indentation on RT film???
(OP)
Dear
this is a problems on the RT films of piping welds, which one can give me a reasonable explanation.
on the films one indication (a dark line on the root weld edge ares )looks like lack fusion ,but as my and my friend many year experience, this is not the lack fusion.
the welding process is GTAW +SMAW for 6” pipeline
anyone can explain why this dark line appeared ?

this is a problems on the RT films of piping welds, which one can give me a reasonable explanation.
on the films one indication (a dark line on the root weld edge ares )looks like lack fusion ,but as my and my friend many year experience, this is not the lack fusion.
the welding process is GTAW +SMAW for 6” pipeline
anyone can explain why this dark line appeared ?






RE: indentation on RT film???
RE: indentation on RT film???
RE: indentation on RT film???
Looks like a bit of undercut on the toe of the root side. If it were incomplete root penetration it would be more toward the center of the weld cross section (assuming the 2 top passes are even over root). Any side wall lack of fusion would be broader and somewhat uneven along the length of the indication. Any way to confirm with mirror or borescope / camera on ID of pipe?
JR97
RE: indentation on RT film???
RE: indentation on RT film???
It is root concavity and is perfectly acceptable (based on the evidence above).
Are you a radiographic interpreter ?
Why are you posting these films and saying you have a problem - has your RT company rejected them ?
RE: indentation on RT film???
RE: indentation on RT film???
RE: indentation on RT film???
this is no central dark strip indication, so root concavity is not possible.
i dont understand for you secondary section about GTAW vertical up and SMAW cellulose vertical down.
RE: indentation on RT film???
And you base this on how many years interpreting RT Films ?
i dont understand for you secondary section about GTAW vertical up and SMAW cellulose vertical down
If you cannot understand what I have posted it is a waste of time to try explaining.