This paper reviews the test methods and results of an investigation of several explosions on an industrial oxygen piping system. Suspected causes of the explosions included interference from overhead HVAC power lines, phase-to-ground fault currents, and lightning strikes both on the power lines and on above ground piping appurtenances. Investigative procedures included computer modeling of the power line grounding system, measurements of grounding grid effectiveness, and induced AC testing.

Subject
Test methods, Piping, Lightning, Piping systems, Cathodic protection, Cathodic current, Pipelines, Flanges, Equipment, Towers, Oxygen, Electrical isolation, Fault currents
Keywords:
underground, pipeline, piping, oxygen, explosion, induced AC, grounding, isolation, lightning
© 1998 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).
1998
Association for Materials Protection and Performance (AMPP)
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