A comparative study of 3D and axisymmetric magnetizer assemblies used in magnetic flux leakage inspection of pipelines

Author

Katragadda, G. ; Si, J.T. ; Lord, W. ; Sun, Y.S. ; Udpa, S. ; Udpa, L.

Author_Institution

Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA

Volume

32

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

1573

Lastpage

1576

Abstract

Axisymmetric numerical codes are often used in modeling non-destructive testing phenomena, to approximate geometries and defects which are not truly axisymmetric in nature. This is especially true in cases where large computational resources are needed to model the exact geometry. However, there has been no study to confirm the nature and extent of errors introduced by an axisymmetric approximation. The gas pipeline industry makes use of bath axisymmetric and non-axisymmetric magnetizers for the magnetic flux leakage inspection of pipelines. The authors utilize this platform to perform a comparative analysis of axisymmetric and non-axisymmetric magnetizers from a design perspective and also study the differences in respective electromagnetic behavior

Keywords

inspection; magnetic leakage; nondestructive testing; 3D magnetizers; axisymmetric magnetizers; defects; electromagnetic modelling; gas pipelines; magnetic flux leakage inspection; nonaxisymmetric magnetizers; nondestructive testing; numerical codes; Assembly; Computational geometry; Electromagnetic analysis; Gas industry; Inspection; Magnetic analysis; Magnetic flux leakage; Nondestructive testing; Pipelines; Solid modeling;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.497552

Filename

497552