For CSA W47.1, what classification is required for a welder to be qualified to perform complete joint penetration butt splices on tubular sections from one side?

• A. F2 Class
• B. S Class
• C. T Class
• D. R Class

Answer: (C)

In CSA W47.1, welder qualifications are tied to the joint geometry and how you access the weld. A complete joint penetration (CJP) butt weld on tubular sections that you weld from one side requires the classification that specifically covers tubular joints with one-sided access. That classification ensures the welder has demonstrated the ability to achieve full penetration and sound fusion in the curved, restricted geometry of tubes from a single side.

The other classifications are intended for different joint types or access conditions, so they don’t authorize this particular one-sided tubular CJP butt weld.