Magnetic Particle Inspection (MPI)
Magnetic Particle Inspection is a technical method of detecting both surface and subsurface flaws in ferromagnetic materials (carbon based steels/mild steel). The principle of MPI is primarily where a current is applied to a conductor, thus a magnetic field will occur.
The induced magnetic field will produce a flux leakage field around any discontinuities in the item, this leakage field is revealed by applying ferrous iron particles (usually from an aerosol) to the surface of the item. These ferrous particles cluster at areas of flux leakage to give indications of a flaw in the inspection area.
Gtechnic Integrity Management inspectors are highly trained to PCN standards in MPI and possess a vast amount of experience carrying out MPI surveys around the globe.