Stainless Steel Welding without Back Purging

[uglyspec]

If I back weld a stainless steel joint butt joint with FCAW would I then need to grind, gouge and clean up the opposite side prior to welding? Or should back welding limit the oxidation and sugaring?

Thanks!

 

[metengr]

Absolutely you need to remove the heat tint/oxidation from back welding with no purge and prepare the opposite side of the weld prep for welding.

 

[stan000]

yes gouge & clean up up to sound metal.

stanly