This paper reviews the development, application and in-service performance of FBE and 3LPE coatings. The main factors affecting the fitness for purpose of a coating are the risk of failure and the modes of failure when the pipeline is in service. Coating failure modes are discussed with particular reference to whether the dominant failure mode will create problems of long term CP shielding and associated corrosion risks. Examples of failures in new 3LPE coatings are discussed. The paper concludes with an overview of representative coating application costs for FBE and 3LPE coatings and the impact of poor application practices on through life inspection costs and integrity management.

Subject
Thermoplastic coatings, Costs, Piping, Adhesives, Cathodic protection, Pipelines, Fusion bonded epoxy coating, Surface preparation, Coating adhesion, Shielding, Coating defects, Corrosion protection, Three-layer polyethylene coating
Keywords:
coatings, cathodic protection, degradation, costs
© 2005 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).
2005
Association for Materials Protection and Performance (AMPP)
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