NONDESTRUCTIVE INSPECTION METHOD OF METAL PIPING

摘要

PROBLEM TO BE SOLVED: To provide a nondestructive inspection method of metal piping constituted so as to inspect changes in morphology of the piping metal, which exists on the inside parts, surrounded by a weld line of the metal piping and cannot be inspected directly, because another structure has been welded to the outer surface of the metal piping and the piping metal exists at the inside part surrounded by weld line, in a nondestructive manner, and that has superior effects of being capable of inspecting the metal piping accurately and rapidly.;SOLUTION: In the method for inspecting the change in the form of the piping metal, which is provided at the inside part, surrounded by the weld line of the metal piping and cannot be inspected directly, because another structure is welded to the outer surface of the metal piping, and the piping metal is present at the inside part surrounded by the weld line, in a nondestructive manner, a probe of a ultrasonic guide wave method is placed on the outside of the part surrounded by the weld line in the vicinity of an inspection part. As the metal for the metal piping, iron can be cited. As a specific example of piping, piping for transporting a fluid in a chemical plant can be cited, and there is no restriction on the size or the shape of the piping.;COPYRIGHT: (C)2006,JPO&NCIPI