![](https://www.mcaa.org/ncpwb/wp-content/uploads/sites/4/2021/07/NCPWB-Technical-Bulletin_MCAAWebsite.jpg)
P-number is a numbering system used by ASME for grouping materials of similar weldability so that Code users don’t have to qualify every material that is being welded.
Related Articles
P-number is a numbering system used by ASME for grouping materials of similar weldability so that Code users don’t have to qualify every material that is being welded.