Abstract
This document describes a means of calculating a credible corrosion rate for establishing integrity reassessment intervals for a pipeline that has sustained corrosion-caused metal loss. The method uses corrosion pit depths determined at a point in time by either direct measurement or inferred indirectly from inspection data or a combination of both. The history of the pipeline can be used to determine logical points in time for the corrosion to have initiated. Probability density functions are used to represent the time of corrosion initiation and pit depth data, and through a Monte Carlo simulation the 80 percent upper confidence bound corrosion rate is determined.
© 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)
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