FLAW DETECTION METHOD OF PIPE BY ULTRASONIC WAVES AND ULTRASONIC FLAW DETECTOR

摘要

PROBLEM TO BE SOLVED: To obtain an ultrasonic flaw detection method and an ultrasonic flaw detector capable of detecting the flaw of a pipe body over the total periphery thereof within the narrow moving range of a probe. ;SOLUTION: A flaw detector 20 is equipped with the frame body movable on the surface of a pipe body in the pipe axis direction thereof, a peripheral position adjusting mechanism 24 for regulating the positions of a transmitting probe 21 and a receiving probe 22 in the peripheral direction of the pipe body, the peripheral angle adjusting mechanism 25 supported on the frame body 29 in a rotatable manner and supporting the transmitting probe 21 emitting ultrasonic waves toward a pipe wall and the receiving probe 22 receiving the ultrasonic beam transmitted through the pipe wall and a peripheral moving mechanism 26 for moving the frame body in the direction crossing the pipe axis of the pipe body at a right angle over a predetermined range.;COPYRIGHT: (C)2001,JPO