Magnetic Particle Testing (MPT) Level-II

Introduction

Magnetic particle testing or Magnetic particle inspection – called MPI inspection or magnetic crack detection – MPT / MT in short is one the most widely used Nondestructive testing method for inspection of ferro magnetic materials, components and structures made of Iron, Nickel and Cobalt alloys. As majority of engineering materials are predominantly made of Steel alloys this method is considered important in testing of materials in raw material, during manufacturing and in-service inspection stages. MPI testing is one of the predominantly used NDE method considering the operating cost of equipment, consumables and certified Level I / II inspectors.

Magnetic particle testing method detects surface and subsurface discontinuities. The depth of detection varies considerably from material to material based on magnetic permeability, strength of magnetic flux generated, magnetic particle properties, sensitivity desired and orientation of discontinuity with respect to the direction of magnetic field induced. Although test method can prove sensitivity up to approximately around 14mm under ideal conditions, but in actual practice the detectability or sensitivity is much lesser.

Course Objectives

The course is intended to provide detailed instruction in theory and practice such that the personnel shall be able to

  • Identify suitability of MT for material and inspection procedure
  • Develop inspection techniques and procedure that shall be followed by level I operator
  • Analyse the test results

MT Level II Responsibilities

  • To select proper test technique and equipment as per established procedure
  • To calibrate, set and carry out test or supervise testing by level I operator
  • Prepare test report for acceptance/rejection as per standard
  • Have knowledge of merits and limitations of MT and other common NDT methods
  • Prepare written procedure for level I operator
  • Responsible for care and maintenance of testing machines and accessories

MT Level II Practical training

Same as Level-I + Interpretation, evaluation and recording of test results.

Magnetic Particle Testing Handbook Reference

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