Definition and Interpretation of "Section Thickness" ASME B&PV

[749KDV]

This question pertains to an interpretation or definition of "Section Thickness".
Specifically, ASME B&PV Code Section III NB-2539.4 states that radiograph inspection is required if welding repairs are made >10% of the section thickness. Does that mean "DESIGN" thickness, or "Actual" thickness including extra margin thickness above and beyond the design thickness?
Thanks, in advance.

 

[metengr]

This means actual thickness.

 

[749KDV]

Thanks for your input. I appreciate it.