Reply To: MPI for inspecting the inside diameter of tubes for transverse oriented defects

  • Magnetic Particle Inspection (MPI) (MT)

    nde

    Member
    21/05/2021 at 6:46 am

    A head shot would be current flow and the alternative current flow through a central conductor wouldn’t detect transverse defects.
    You need induced magnetism/magnetic flow with current flowing in a circular direction to induce longitudinal magnetism.
    You need to do the calculations but I suspect the current required for a coil or encircling cables would be impractical.
    A small yoke on a a rod or buggy could apply local magnetisation but you also need to apply fluorescent particles and have a camera. These aren’t technically difficult but not a simple task either and probably fairly slow.