Serviceability of refinery process equipment exposed to wet H2S environments has been an issue of significant concern in terms of both reliability of operation and degradation of equipment subject to the forces of corrosion and cracking. Most of these concerns stem from premature failure of steel equipment in these applications related to absorption of hydrogen produced by the sulfide corrosion reaction Most of the cracking problems in these steels come from absorption of atomic hydrogen and the subsequent formation of blisters in steels exposed to aqueous H2S environments. An object-oriented knowledge-based system that facilitates evaluation of typical refinery steels and environments is described in this paper. This system, called Strategy, incorporates reasoning methodologies to perform material and environment evaluations as a means to assess reliability of steel refinery equipment exposed to wet H2S service.

Subject
Steel structures, Knowledge based systems, Materials, Reliability, Refineries, Interfaces, Steel, Scale, Stress oriented hydrogen induced cracking, Hydrophobic interaction chromatography, Sulfide stress cracking, Stress corrosion cracking, Hydrogen
Keywords:
HIC, SSC, SOHIC, Wet H2S Service, knowledge-based systems, reliability assessment
© 1994 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).
1994
Association for Materials Protection and Performance (AMPP)
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