Russell K. Austin This study was a performance demonstration of various nondestructive evaluation techniques that had previously been identified as promising for detecting internal and external damage in insulated piping. Detection of corrosion under insulation typically is an expensive and time-consuming process because of the need to remove the insulation. This was the first effort towards qualifying and standardizing methods of inspection for insulated piping without removal of the insulation. Ten different methods based on electromagnetic, radiographic, and ultrasonic techniques were evaluated which included neutron backscatter, pulsed eddy currents, three types of guided wave ultrasonics, through transmission radioscopy, and electromagnetic encircling coils. The techniques were evaluated on the basis of accuracy, limitations, government regulation, operator requirements, equipment availability, and ease of use. 1999, ISBN 1-57698-022-7 (Available only as a pdf file on a CD) |