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Magnetic Flux Leakage [MFL]

Magnetic Flux Leakage – (MFL)

Magnetic Flux Leakage is a Non-destructive testing method which is based on Magnetism and MFL is used to identify discontinuities like pitting and corrosion in tanks used for storage, structure of steel and in pipelines mostly. MFL works over the principle of magnetism that is created by strong magnets into the steel. As name MFL defines Magnetic Flux Leakages it means that discontinuity is identified where Magnetic flux leakage is observed. Inspector uses chart recordings to read and interpret and identify defected area and depth of metal loss by interpreting leakage field. As Magnetic Particle Testing is used to identify defect that is close to the surface or upto 0.6 inch under ideal condition, but this method MFL is more sensitive to defects in far surface with increased level of magnetization.

Advantages of Magnetic Flux Leakage

  1. In carbon steel Magnetic Flux Leakage Testing is sensitive to pits.
  2. MFL has very good sensitivity for pitting.
  3. On fine tubes Magnetic Flux Leakage Testing can be used.
  4. Speed of inspection is high in MFL.

Disadvantages of Magnetic Flux Leakage

  1. This method cannot be used in nonferrous materials like Aluminum, Magnesium and many stainless steels.
  2. MFL is very limited in sizing of defects.
  3. Axial crack detection in MFL is very poor.
  4. Signal sensitivity of MFL depends upon pull speed.
  5. Unable to identity defects similar to isolated pin hole.

Know more about the upcoming training schedule, by clicking here. 

NDT Level I Magnetic Flux Leakage (MFL) Syllabus

  1. Disadvantages and advantages of MFL methods
  2. Flux Leakage Theory
  3. Properties of Metal and Magnetic Field 
  4. Magnetism with Electric Current
  5. Hysteresis Loop
  6. Flux Leakage Sensing Equipment
  7. Identify hazards with MFT
  8. Enhancing testing environments
  9. Techniques for improving inspection skills
  10. Factors affecting MFT measurement accuracy
  11. Proper ways to carry out and conduct MFT methods

After successful completion of training, participants will be appearing for the Level I exam.

Participants will be certified as NDT MFT Level I after successfully clearing the exam.

NDT Level II Magnetic Flux Leakage (MFL) Syllabus

  1. Identify minute hazards with MFT
  2. Advanced Enhance testing environments
  3. Advanced Techniques for improving inspection skills
  4. Factors affecting MFT measurement accuracy
  5. Coupling
  6. Flux Leakage Field Application
  7. Drill Tube Inspection
  8. Tank Bottom Floor Inspection
  9. Manufacturing Discontinuities
  10. Manufacturing Discontinuities
  11. Proper ways to carry out and conduct

After successful completion of training, participants will be appearing for the Level II exam.

Participants will be certified as NDT MFL Level II after successfully clearing the exam.

Check NDT Level 1 and Level 2 Fee Structure, by clicking here.


A training institute that is profusely providing industry oriented technical education with live hands-on practical’s sessions. Indian and International professionals prefer certification training program in Non-Destructive Testing at Advanced Institute of Non-destructive Testing & Training (ANDT), to create a bright future in Oil and Gas, Petroleum, Aircraft, Refinery, Airspace-ship and other mechanical industries, by availing the NDT Level II certification courses at ANDT either Online or Offline in branch offices ANDT Greater Noida, ANDT Mumbai and ANDT Hyderabad, India.

Aspiring participants get 100% Placement in India & Abroad after successful completion of the NDT Level II Training program.

Magnetic Flux Leakage Testing Syllabus is as per ASNT SNT TC 1A-2016 which trains participants so that they gain sound practical & theoretical knowledge to work under the supervision of NDT MFT Level III experts. It is required to have good health, positive mindset & technical skills to perform calibration and inspection as per written instruction under the supervision of NDT MFT Level III.

Eligibility for Magnetic Flux Leakage NDT Training Level I, II Certification Courses

Eligibility, qualification, and experience requirements as per the written recommended practice of SNT-TC-1A, 2016 Edition are given below.

Non-destructive testing courses are considered as the most valuable professional courses to improve individuals’ skill sets and ladder for the steep career growth in quality control QA/QC functions in manufacturing and processing industries. These courses are especially considered as short term professional courses for any Mechanical, Metallurgical, Civil, Electrical, and other engineering professionals. Based on proficiency requirements, certification is offered for NDT level I, level II, and NDT level III. In order to be eligible for each NDT level, the individual should meet the required eligibility criteria.

Candidates interested in certification of non-destructive testing should have sufficient education, training, and experience to ensure eligibility in required NDT methods in which they are being considered. Candidates with diploma in Engineering or bachelor’s degree in Engineering (Mechanical engineering, Metallurgy, Civil or any engineering) or bachelor’s degree in math, science, or plus 2 / intermediate with math, science are eligible for the courses. Depending on the NDT level chosen, the method selected, candidates with other educational qualifications also are eligible provided if they can meet the following recommended criteria.

In addition, the candidate must meet the following other eligibility as per the written practice.

  • Near-vision acuity
  • Color contrast differentiation

Codes and Standards used in Industry, by clicking here.

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