Slag or undercut

by Nicky
(Alberta)

How do u know that xray knows how to call Slag or undercut on B31.3 severe cyclic?

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you never really know if the x ray tech is adequately trained and experienced.
Thats why a lot of folks are of the opinion that x ray techs and other ndt inspectors should be welders or at least have a certain amount of practical welding experience.

Otherwise, the x ray tech might be using a standard chart for common welding defects.

I have seen inspectors label a slag inclusion on a titanium tig weld .040" thick single pass test weld.

turned out there was a big chart in the inspection room with all the common weld defects and the inspector , who had zero welding experience was just matching up negatives the best he could.

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