Defect detection of pipes using shearography and lock-in infrared thermography

Abstract

Dept.of Mechnical Design Eng., Chosun Univ., 375 Seosuk-dong, Dong-gu, Gwangju, Korea, yonggary@ieee.org In this study, shearography and infrared thermography were used for measuring the wall thinning defects of the nuclear power plants pipes. It is very important to measure the wall thinning defects inside the pipes, because the wall thinning defects cause damage or destruction of the pipes. The defects are mainly occurred by the effect of the flow accelerated corrosion of fluid which flows in pipes. As a result of experiment, length and depth of the defects which are located in the pipes was accurately measured. So, the wall thinning defects are evaluated quantitatively by using shearography and infrared thermography.