Electromagnetic Inspection (EMI) is a widely used non-destructive testing method applied to tubular products, including tubings and drill pipes. This inspection technique involves a full-length scan of tubes using a coil to induce a longitudinal magnetic field. A buggy type unit is then used to detect transverse flaws in the inspected material such as fatigue cracks, corrosion, pits, cuts, gouges, and other types of damage that exceed the specified acceptance limits.

If any flaw is present in the material being inspected, the induced magnetic field creates flux leakage at the point of the flaw. This leakage is detected by hall effect probes mounted on the buggy. Finally, the signals obtained from the probes are interpreted and evaluated by a certified inspector to make a decision.

Overall, EMI is a highly effective and reliable method for identifying flaws in tubular products, making it a valuable tool for ensuring the safety and quality of these materials in various industries.