Abstract: Equipment of the invention provides ultrasonic flaw detection equipment using a volume focusing flaw detection method, the ultrasonic flaw detection equipment described below. That is, this equipment performs internal flaw detection of a material being tested, the material having a virtually circular cross-sectional shape, and transducers 1 . . . 1 are arranged in an arc along a circle exhibited by the material being tested. Array probes 10 . . . 10 are disposed so as to surround the material being tested. An exciting unit enables flaw detection of the material being tested to be performed by vertical and oblique flaw detection methods.

Abstract: Equipment of the invention uses a volume focusing flaw detection method. In a sectional view of a material m being tested, a plurality of transducers 1 . . . 1 of one of array probes 10 are arranged along one side of a rectangular shape of the material being tested, and a plurality of transducers 1 . . . 1 of the other of the array probes 10 are arranged along one of sides adjacent to the one side.

Abstract: Equipment of the invention uses a volume focusing flaw detection method. In a sectional view of a material m being tested, a plurality of transducers 1 . . . 1 of one of array probes 10 are arranged along one side of a rectangular shape of the material being tested, and a plurality of transducers 1 . . . 1 of the other of the array probes 10 are arranged along one of sides adjacent to the one side.