Weld on weld
Weld on weld
(OP)
Our contractor finished a bridge and his electrical department welded a non structural piece to suport electrical conduits right on a CJP on a 2" element of the structure. We ordered to cut off that new piece, can we request an NDT supported on AWS or AISC?





RE: Weld on weld
I believe your concern is reasonable.
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RE: Weld on weld
It is dubious at best to believe the hanger was welded with the same level of scrutiny. Was a written procedure followed? Was the welder qualified? Was the hanger welds inspected once they were completed? You can see where this is going?
It is up to the owner to determine if the hanger is acceptable in the present state. The contractor that made the initial welds met his obligation once the owner (most likely a third party inspector representing the owner) accepted the welded joint. Anything done to the completed weld after the fact is beyond the original contractor's control. If there is a question on the quality of the hanger, the location of the hanger, welding to an existing weld, etc., it it is the owner's responsibility to get the issues resolved to their satisfaction.
As the owner, I would request the hanger be relocated; the weld ground to the original condition and some NDT, perhaps a liquid penetrant test performed after the area is ground smooth. I would also perform an acid etch after the penetrant test (not before because the acid entrapped by a crack can adversely affect the penetrant test results) to ensure the HAZ from the hanger is completely removed.
The owner should approve the new hanger location and the welding documents, i.e., WPS and welder performance test records, reviewed before the replacement hanger is welded in place.
Best regards - Al
RE: Weld on weld
The welder on the second weld was qualified, what it was not is the procedure, (I can´t say for example if the electrodes on the second weld were dry or not). I worry about contamination of the first weld, so I believe it is somebodys responsability to NDT...
RE: Weld on weld
While it is probably not going to show anything significant, it is a good CYA procedure and documents a changed condition that occurred outside the approval process.
Relocate the bracket.
RE: Weld on weld
If what they did can't really be considered a nonconformance, then you might have to be prepared to pay to do what's right--and what's right is what others have advised and what you would like to require.
Hg
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RE: Weld on weld
Best regards - Al
RE: Weld on weld
RE: Weld on weld