In the application of Magnetic Flux Leakage (MFL) pipeline inspection technology, corrosion anomalies are detected and identified via their leakage field due to changes in wall thickness. This leakage field is a three dimensional magnetic vector consisting of three distinct components: axial, radial, and circumferential. A new pipeline inspection technology is the first to use the circumferential component in data analysis1,2. The three leakage fields are described in detail with an emphasis on the circumferential field. Examples of practical application are given to illustrate the effectiveness of this field in identifying and sizing defects.

Subject
Sensors, Materials, Piping, Inline inspection, Walls, Girth welds, Leaks, Pipelines, Inspection, Metal loss, Flaws, Defects, Wall thickness
© 1999 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1999
Association for Materials Protection and Performance (AMPP)
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