Abstract
Tube failures due to chloride attack have occurred with increasing frequency within both the reactor circuit and fractionation section of high severity hydroprocessing units. The fractionator feed preheat exchangers are particularly susceptible to chloride attack. This susceptibility develops when poor oil/water separation provides a mechanism to transfer chlorides from the reactor section into the fractionator feed stream. This paper describes the corrosion experience in the fractionator feed preheat exchangers of three hydrocracking units and reviews the materials and process modifications instituted to manage the corrosion severity.
© 2000 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).
2000
Association for Materials Protection and Performance (AMPP)
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