欠陥部を完全に削り取る。
溶接作業に必要形状につくり欠陥の無いこと。
肉厚部でザク巣のあってはならない場所は仕上面より5mm深く削る。
(例 バルブボディのパッキングシール面部など)
I scrape off completely defective part.
That there are no defects to make necessary shape to welding work.
Where there should not be a Zaku nest in the thick part is I cut deeper than 5mm surface finish.
(Such as packing seal surface of the valve body example)