Magnetic Particle Inspection (MPI) (MT)
Public NDT
Active 4 weeks ago
Welcome to [NDT Inspection Portal]’s Magnetic Particle Inspection (MPI) group, a place for... View more
Public NDT
Group Description
Welcome to [NDT Inspection Portal]’s Magnetic Particle Inspection (MPI) group, a place for professionals to connect and discuss the latest techniques and technologies in magnetic particle inspection. MPI is a non-destructive testing method that uses a magnetic field and iron oxide or iron oxide-coated magnetic particles to inspect the surface of ferromagnetic components such as pipelines, tanks, and pressure vessels. Our member group offers a platform for sharing knowledge and best practices on MPI and its applications in various industries. Join our community of experts from around the world and be a part of the conversation on advancing the practice of magnetic particle inspection.
Reply To: MPI for inspecting the inside diameter of tubes for transverse oriented defects
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.