This paper describes a methodology for assessing and addressing Corrosion Under Insulation (CUI) with respect to refinery pressure vessels. It has been of particular concern in managing the integrity of aging refinery pressure vessels where internal corrosion is not life limiting. Inspection methods and field experience with these methods are discussed. Options for corrosion mitigation are discussed in detail. Review of organic coatings, and metallic sprays such as thermal spray aluminum (TSA) is attempted. The paper provides a number of successful and unsucessful case histories of vessel CUI mitigation by field applied coatings. Success factors for coatings applications under field conditions are also highlighted.

Subject
Coating inspection, Coating application, Water, Coatings, Insulation, Minerals, Wool, Steel, Equipment, Organic coatings, Corrosion under insulation, Visual assessment, Barrier coatings
Keywords:
CUI, risk assessment, NDE, TSA, coatings, insulation, mineral wool, calcium silicate, expanded perlite
© 2007 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).
2007
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.