65.보일러 및 압력용기에 대한 침투탐상검사(ASME Sec.V Art.6)에 따른 침투탐상검사 절차에 관한 내용으로 옳은 것은?

해설

>> 염색 침투액 : 습식 현상제 >> 형광 침투액 : 습식 또는 건식 현상제 T-642 SURFACE PREPARATION (a) In general, satisfactory results may be obtained when the surface of the part is in the as-welded, as-rolled, as-cast, or as-forged condition. Surface preparation by grinding, machining, or other methods may be necessary where surface irregularities could mask indications. >> 지시를 가릴 수 있는 표면 불균일은 연삭, 기계가공 또는 기타방법으로 표면처리가 필요할 수 있다. (b) Prior to each liquid penetrant examination, the surface to be examined and all adjacent areas within at least 1 in. (25 mm) shall be dry and free of all dirt, grease, lint, scale, welding flux, weld spatter, paint, oil, and other extraneous matter that could obscure surface openings or otherwise interfere with the examination. >> 최소 1in. (25mm)