Abstract
The conscientious pipeline operator must monitor many aspects of operational pipeline deterioration. Additionally, some operators must deal with pipelines containing manufacturing defects known as hard spots. Under certain conditions hard spots may crack and fail. A magnetic flux leakage tool readily detects regions of elevated hardness (hard spots) in line pipe. Hard spots may be evaluated with a hardness tester and gauss meter. Repair of hard spots can be accomplished by pipe replacement or the installation of full encirclement split sleeves. By reliable detection of hard spots with flux leakage tool, and the appropriate on-site, post survey verification and repair, hard spot failures can be reduced, if not eliminated.
Subject
Piping,
Parent metals,
Walls,
Pipelines,
Tools,
Inspection,
Corrosion detection,
Leak detection,
Repair,
Anomalies,
Surveys,
Brinell hardness,
Hardness
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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