NDT – Magnetic Testing (MT) / Magnetic Particle Inspection (MPI) for Pressure Vessel NDT – Magnetic Testing (MT) / Magnetic Particle Inspection (MPI) is widely used in nondestructive testing of pressure vessels. The testing methods are as follows: The principle is: The magnetic field will be applied to the specimen, steel and other strong magnetic materials can be strongly magnetized by the magnetic field. If there is a crack on the specimen, and the direction of the crack and the direction of magnetization is right angle, then the magnetic pole appears at the crack, and magnetic leakage field is produced. When fine particles of magnetic particles enter the leakage field, they are attracted and left behind. Because the leakage magnetic field is wider than the crack, the accumulated magnetic powder can be easily seen by the naked eye. When the magnetization is high enough, even if the crack is very […]
Magnetic testing
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