MAGNETIC PARTICLE TESTING

BASIC PRINCIPLE

Magnetization is possible of certain materials, it is possible to find out discontinuities by using a medium (iron powder) having the magnetic attraction. Magnetic Particle Inspection is relatively easy and simple test method that can be applied at various stages of manufacturing and process.
The direction is more important factor than the magnitude of magnetizing current. For reliable inspection, magnetic lines should be perpendicular to the discontinuity. If magnetic lines are parallel to the discontinuity then leakage will be little and an indication will be small or indefinite.

Cracks distort the magnetic lines of force and create poles on either side of the crack. Strength depends on upon the number of interrupted lines of force. An indication of maximum size is found when magnetic lines are at right angle to the discontinuity. The Intensity of magnetization depends upon the susceptibility of material to become magnetized

OBJECTIVE

Magnetic Particle Testing NDT training course is developed to meet the requirements of ASNT SNT-TC-1A, CP -189 and other equivalent standards and customer specific written practice for training and certification in this method of Non-Destructive Testing personnel.

Magnetic Particle Testing is a Non-Destructive Testing method for detection of cracks on or just below the surface of ferrous metals. It is a quick and reliable technique for detection and location of example surface cracks.

EXAMINATION & CERTIFICATE REQUIREMENT

During this classes, you will give examination in General theory, Specification, and Practical.
You are required to successfully pass these three examinations with minimum of 70% grading in each examination and average grading of all three examinations should be 80% minimum as per the requirement of ASNT SNT-TC-1A