L52113 Circumferential MFL In-Line Inspection for Cracks in Pipelines

Circumferential MFL is a new implementation of a widely used technology that has potential to provide improved detection and quantification of axially oriented defects such as cracks, seam weld defects, mechanical damage, and groove corrosion. The objective of this project was to improve detection of cracks by changing the implementation along with using data from overlapping and complementary inspection techniques. Two technology advancements were investigated: combining high- and low-magnetization technology for stress detection and combining axial and circumferential MFL methods. While circumferential MFL and the performance enhancements developed on this project may have limitations, this technology is reasonably well suited for assessing long axially oriented corrosion, which is a challenging anomaly for traditional axial MFL.