CJP Weld with Backing Bar
CJP Weld with Backing Bar
(OP)
I have a fabrication that requires CJP welds for moment connections in a grillage type frame. (Basically welding two wide flange shapes perpendicular to each other.) The intended use of the fabrication is underwater and we typically call to seal weld all joints to minimize corrosion. The CJP weld on the top flange is designed as a single bevel with backing bar. Can we fillet weld the backing bar in place to minimize corrosion or is this going to place a stress concentration at the backing bar? My other option is to remove the backing bar which will add considerable work to the job. Final option is to qualify welders with ceramic backing bar





RE: CJP Weld with Backing Bar
RE: CJP Weld with Backing Bar
RE: CJP Weld with Backing Bar
Depending on the code of construction, seal welding a backing bar for corrosion resistance typically isn't restricted either.
RE: CJP Weld with Backing Bar
Best regards - Al
RE: CJP Weld with Backing Bar
constructions including vessels. I would check to see if
you need a specific procedure as the ceramic backing is not
part of the weld metal like a metal ring.
Also I think ABS has a pre qualification for welding with ceramic backing rings. Don't know if this is only for specific shapes.
I think someone like Cerbaco or Gullco would have this
information.
http://www.cerbaco.com/index.html
http://ca