A new technology has been developed and field tested to monitor pipeline corrosion. This technology utilizes “long gage” fiber optic sensors (FOS) bonded to the exterior surface of the pipe. The sensors measure changes in the strain field which occur as the pipe wall deteriorates with time. These sensors vary in configuration, depending on the application. Local stress corrosion crack (SCC) growth can be monitored using a novel fiber optic “coil” sensor, whereas general internal wall corrosion/erosion can be detected with hoop or spiral wrap sensors which can extend over distances of 100 m or more. This paper presents both laboratory and field test results on crack growth and internal corrosion/erosion of pipelines. FOS technology coupled with structural modeling software provide a means by which continuous, remote monitoring of pipeline corrosion is possible.

Subject
Coils, Pipe surfaces, Crack growth, Sensors, Piping, Walls, Thickness measurement, Pipelines, Stress cracking, Crack depth, Fibers, Wall thickness, Stress corrosion cracking
Keywords:
fiber optic sensors, pipe corrosion, crack monitoring
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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