Toivonen, Juha; DEKRA Industrial Oy; Finland
Toivonen, J.; DEKRA Industrial Oy; Finland
Session: Qualification and standards 2
Time: 15:20 - 15:40
Manual ultrasonic pulse-echo testing techniques, UT, have not developed much during the first decades of application. It is performed roughly the same way as it was done 50 years ago and is still dependant of operator’s performance. Operators need a long theoretical and practical training period, which lasts usually several years.
UT lacks concrete visual documentation, which would be understandable to all customers. Phased array technique, PAUT has the ability to visualise defects, but the interpretation of images still requires expertise.
Mechanized inspection has been, and still is, developing expensive and demanding solutions to replace the probe-moving hand with a manipulator, which is expensive and requires tight tolerances in dimensions of the welded joints.
PAUT has been the only major development step during the last decades. Despite the long evolution time we are still waiting for standards to be able to fully apply new techniques. The lag of standardization is much too long and it is obstructing the application of new techniques.
This presentation describes the dream come true ultrasonic testing technique as it should be in the future from a user’s point of view. Design is based on customer’s needs, adapting the existing techniques in other fields than NDT and extrapolation of the technical development.
One solution for ultrasonic testing of welds in the future is presented. The solution includes scanning of welds without mechanical movement and information is gathered without the variation of human performance. The requirements for ultrasonic operator are less demanding and the whole process is more efficient. Interpretation of the results is based of artificial intelligence. Results are visualised for the customer in a concrete image.
In addition the needs for the development of standardization, training and certification are discussed. A performance based standardization scheme is outlined.