FEA of pipeline magnetic flux leakage NDE

The magnetic flux leakage (MFL) technique is a viable approach to the non-destructive evaluation of pipelines. In this paper, we introduce two-dimensional (2D) finite element analysis (FEA) to estimate the defect profile from the pipeline MFL inspection. The 2D defect characterization would be measured by the axial and the radial components of the MFL. The signals can show the features of the leakage magnetic field. From the vector graphs, the defect outline and parameters can be described. The peak value of the MFL signal changes along with the changes of the width, depth, and the lift-off to the defect. And the 2D FEA of pipeline NDE to provide a basis for identification of defects and prepared to do quantitative analysis of defect.