Abstract
In-line inspection (ILI) by Magnetic Flux (MFL) Intelligent Pigging of pipelines is perhaps the most convenient method to assess the internal condition of an operating pipeline. Even though ILI pigging data provides a sound assessment of the internal corrosion status of the pipeline, it may miss some indications which may lead to failures even after conducting the ILI assessment. Hence judicious interpretation of the ILI data is needed.
This paper highlights the findings of an investigation of a ruptured high-pressure gas line which failed in a region, where the ILI data had not shown indications of any significant corrosion damage or reduction in thickness. The possible reasons for the discrepancy in the ILI data are discussed.
© 2012 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).
2012
Association for Materials Protection and Performance (AMPP)
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