Abstract
The T-8-20 Task Group conducted a survey of plant practices and of the performance of materials of construction in HF Alkylation Units. A primary goal of the survey was to expand the limited body of information on alternative alloy performance in HF alkylation units and to better define the susceptibility of steel to hydrogen induced cracking. Survey results indicate that although the incidence of cracking is reported to be low, hydrogen blistering is commonly found in pressure vessels. Few applications of alternative alloys were reported, but several areas of vulnerability or high corrosion rates are identified. Common design and maintenance practices are reviewed.
Subject
Acids,
Pressure vessels,
Materials,
Piping,
Valves,
Inspection,
Defects,
Steel,
Construction,
Carbon steel,
Surveys,
Blistering,
Alloys
Keywords:
Hydrofluoric Acid Alkylation,
HF,
survey,
cracking,
blistering,
hydrogen embrittlement,
HIC,
SOHIC,
HSC,
SCC
© 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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