scope:

This standard was developed to serve as a simple means of specifying the acceptable level of discoloration of the root side of stainless steel pipe welds. It does this using photographs of rootside surface oxidation of stainless steel welds made using GTAW and purge gas with various oxygen levels. It also gives general guidance on the level of root surface discoloration that can be tolerated for some service conditions. This standard may be applied to welds made using any welding process. While this standard refers to pipe, it is also applicable to welds made using tube.