Magnetic Flux Leakage is a commonly used inspection method when looking for localized areas of pitting or wall loss. A high throughput method of inspection, MFL is commonly used in smart-pigs or for the inspection of tank bottoms.
CANEIL conducts tank bottom inspections through the use of a Silverwing Floor Scanner, which allows for quick, accurate inspections of tank floors, in conjunction with ultrasonic testing work-up to verify results. The advantage of this system to manual MFL systems is the accurate generation of a full map of the tank floor, showing all areas of detected floor loss, along with their relative size and depth, and the the worked-up UT results. An example of the data generated by this equipment is shown here.
MFL can be used in other areas than tank floors and pipelines. The external inspection of large areas in an attempt to identify localized areas of corrosion can be conducted through the use of hand MFL scanners in order to quickly cover large areas and to identify areas of concern.