Magnetic Flux Leakage (MFL) for Tube Inspection applies a strong magnetic field across heat exchanger or boiler tubes. When defects such as corrosion, erosion, or wall thinning occur, magnetic flux leaks from the tube wall and is detected by sensitive sensors. This method enables simultaneous detection of both internal and external tube damage, providing accurate and rapid results. MFL is particularly effective for large bundles of heat exchanger tubes where ensuring reliability and heat transfer performance is critical.