Ultrasonic Evaluation of Pipe Welds in Steam Power Plant by Using Mobile Automated Scanning System

A new nondestructive evaluation technique by using multiple-view ultrasonic imaging based on mobile automated scanning system has been used to the inspection of pipe welds in-service in steam power plant. The experimental and applied results have shown that defect characteristics, for examples, its location, distribution and orientation, etc, can be exhibited well in the multiple ultrasonic A, C and P-scan images. Detectable probability and reliability of finding defects can be improved remarkably by using the multiple-view ultrasonic imaging based on mobile automated scanning system.