the size of the cladding and buttering bond defect that is allowed is 0.25 inch by 0.75inch (6.4mm by 19.0mm)bounded by 2T(T=wall thickness) on both sides of each full-penetration pressure boundry weld. unbonded areas exceeding 0.442 square inches(285mm2) or 0.75 inch diameter (19.0mm) in other regions are rejected.