METHOD FOR ULTRASONIC TESTING OF ELONGATE HOLLOW PROFILES

The invention relates to a method for ultrasonic testing of angled hollow profiles (5) consisting of sound-conducting material, in particular consisting of metal, comprising an ultrasonic testing device (11), consisting of a probe (1) having transducers (A to G), which are arranged on a transducer ruler (4), in a phased-array technique, wherein ultrasonic signals (10) for detecting external and internal defects on the hollow profile (5) are generated by the transducers (A to G) and are coupled into the surface of the hollow profile (5). In order to implement testing of the test body outer and inner surface for defects, in particular longitudinal defects, including the radius regions, which testing has a greater level of quality assurance and can be automated in a cost-effective manner, it is proposed that for the purpose of detecting external and internal defects in a surface region (5.6) and in radius regions (5.5) of the hollow profile (5), the transducers (A to G) are adjusted in dependence upon their position with respect to the surface region (5.6) and their position with respect to the radius regions (5.5) of the hollow profile (5) such that ultrasonic signals (10) are generated having intromission angles adapted to the external and internal defects in the surface region (5.6) and in the radius regions (5.5) and that prior to the actual ultrasonic testing of the hollow profile (5), ultrasonic testing is performed on a reference profile (5').