Welding Copper Pipe x SS Pipes

[4872]

Dear Friends
We need to qualify PQR the above. Appreciate advise on suitable consumables and welding parameters. Weld Process - GTAW/SMAW.Normally we prefer to use Kobeloco /Esab Consumables.
Thanks in advance

 

[Ron]

Copper is difficult to weld properly. Probably your best bet is using GTAW process with appropriate filler material for both materials. Brazing would be an easier, appropriate method.

 

[racookpe1978]

Copper brazing (or even soldering - as in ten billion commercial and residencial plumbing connections ...), then use a mechanical connection to get to your stainless steel section of pipe. (Cu Flange + gasket + SS Flange)

I can't see anything but trouble trying to reliably get even a few copper to stainless connections in the field. Much less dozens and dozens in many different places.