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Journal of Failure Analysis and Prevention

, Volume 16, Issue 2, pp 316–323 | Cite as

Finite Element Modeling of Magnetic Flux Leakage from Metal Loss Defects in Steel Pipeline

  • Sorabh
  • Arvind Gupta
  • Kannan Chandrasekaran
Technical Article---Peer-Reviewed

Abstract

Magnetic flux leakage is a nondestructive method for inspection of steel pipelines carrying petroleum products, and is most widely used technique. The inspection tool used for this purpose is called instrumented pipeline inspection gauge (IPIG) which moves with the pressure of fluid inside the pipeline. In this paper, a three-dimensional finite element modeling and static simulation of the magnetic circuit of a magnetic flux leakage-based IPIG has been carried out. A FEM-based MagNet software has been used. Rectangular defects of different dimensions on a plate have been modeled, and the magnetic flux leakage response from each of these defects has been studied. Appropriate properties and boundary conditions have been imposed in the simulation. The dependency of some of the characteristic defect dimensions and the leakage flux signal has been studied. In addition, the effect of sensor liftoff on the leakage flux values for specific defect geometry has been studied and understood. Furthermore, the effect of defect orientation on the internal or external surface as against the sensor positioning has also been studied. A comparison of the FEM-simulated flux values with that of experimental leakage flux values has been made.

Keywords

Magnetic flux leakage Instrumented pipeline inspection gauge Finite element method MagNet 

References

  1. 1.
    J.B. Nestleroth, T.A. Bubenik, Magnetic Flux Leakage (MFL) Technology for Natural Gas Pipeline Inspection. http://www.battelle.org/pipetechnology/mfl/mfl98main.html
  2. 2.
    Collaboration for non-destructive testing. NDT course material—MPI, from http://www.ndted.org/EducationResources/CommunityCollege/MagParticle/cc_mpi_index.htm
  3. 3.
    M. Kirkwood, TD Williamson from Overcoming Limitations of Current In-line Inspection Technology by Applying a New Approach Using Spiral Magnetic Flux Leakage (SMFL)Google Scholar
  4. 4.
    U.N. Kant Sahu, Finite Element Modeling of Magnetic Field in Pipeline, Master’s thesis, Indian Institute of Technology Madras, 2012Google Scholar

Copyright information

© ASM International 2016

Authors and Affiliations

  1. 1.Manav Rachna International UniversityFaridabadIndia
  2. 2.YMCA University of Science and TechnologyFaridabadIndia
  3. 3.Research and DevelopmentIndian Oil Corporation LimitedFaridabadIndia

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