Magnetic Particle Inspection (MPI)

The basic procedures followed by DELTA GROUP to perform magnetic particle testing are:

• Pre-cleaning of components

• Introduction of the Magnetic field

• Application of magnetic media

• Interpretation of magnetic particle indications

Advantages of Magnetic particle testing (MPT):

• Detects both surface and near subsurface indications

• Can inspect parts with irregular shapes easily

• Fast method of inspection and indications are visible directly on the surface

• Low cost compared to many other NDT techniques

• Very sensitive test method

• Detects tight in-service fatigue cracks in rotating parts or creep cracks on the steam piping

• Easy to use and requires a minimal amount of training

We at DELTA GROUP use Magnetic Particle Inspection (MPI) which is a proven and reliable method for detecting even the smallest surface, or near-surface flaws in ferrous materials. Moreover, the MPI inspection establishes the magnetic field pattern of the material and pinpoints cracks by identifying any distortion in that field.

Cracks cause leakage of magnetic flux in the vicinity of the flaw, and the equipment identifies build-ups of very fine iron particles that gather at the location of the leakage, however small it may be.