scope:

(a) This Case provides requirements for evaluation of Class 2 and 3 piping items (e.g., pipe and fittings) with internal or external wall thinning.

(b) This Case is applicable to wall thinning due to flow-accelerated corrosion and other corrosion mechanisms.

(c) The provisions of this Case apply to Class 2 and 3 butt-welded pipe, pipe bend, elbow, tee, branch connection, or reducer piping items.

(d) This Case shall not be applied to planar flaws.

(e) This Case shall not be applied to wall thinning locations in piping items that are not accessible for either volumetric examination or direct physical measurement.