Abstract: The feasibility of applying ultrasonic guided waves in detection of power boiler main steam pipe was discussed. The proper guided wave mode was selected for experiment. The experimental result shows that the detection of main steam pipe applying ultrasonic guided waves is feasible. In the experiment, the notch with depth of 1.5mm and width of 0.2mm in inner surface and outer surface of a pipe were detected, and the detection was much faster than traditional point-by-point detection method.

Key words: ultrasonic wave, guided wave detection, main steam pipe, power boiler