ULTRASONIC TESTING METHOD AND EQUIPMENT THEREFOR

摘要

An ultrasonic testing method and ultrasonic testing equipment can be used for detecting a flaw existing on a tubular test object such as a steel pipe or tube using an ultrasonic wave. The equipment includes: an ultrasonic probe, a pair of follow-up mechanisms arranged along an axial direction of the test object and a pair of arm mechanisms arranged along the circumferential direction of the test object. Each of the follow-up mechanisms includes at least one rolling roller that is capable of rolling in contact with the external surface of the test object in every direction or in two axial directions, and each of the arm mechanisms has at least one pair of rolling rollers that are arranged to sandwich the center of the ultrasonic probe and are capable of rolling in contact with the external surface of the test object in every direction or in two axial directions.