The performance of in-line inspection tools employed for integrity assessments has significant impact on the reliability of assessment results, the extent of required remediation, and justification of re-inspection intervals. Analytical methods for verification of assumed performance metrics, in terms of sizing are presented in this paper. The application of methods and criteria described in API 1163 for rejection and acceptance of assumed tool tolerance are discussed. Methods for sampling in-line tool results for verification are also presented and compared.

Subject
Test methods, Confidence intervals, Materials performance, Probability distributions, Inline inspection, Tools, Tolerances, Inspection, Metal loss, Probability, Anomalies, Samples, Sampling
Keywords:
ILI tool performance, API 1163, verification, sampling, acceptance, rejection, binomial distribution, certainty, confidence, confidence intervals
© 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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