Abstract
Advanced creep degradation was discovered in steam methane reformer (SMR) outlet pigtails during planned maintenance. The outlet pigtails were fabricated from alloy 800HT (ASTM B407 UNS N08811) which had operated within design pressure and temperature for approximately six (6) years. It is industry knowledge that there have been instances of wrought alloy 800H/HT suppliers not complying with the applicable grain size requirements of ASTM B407. Additionally, a few SMR operators use supplemental grain size requirements that are more conservative than ASTM B407. This paper will document the extent of the damage, root cause, repair, and a recommendation to API TR 942-A.
Subject
Grain size,
Test methods,
Materials,
Manufacturing,
Tubes,
Creep damage,
Industries,
Thickness measurement,
Swelling,
Creep,
Catalysts,
Alloys,
Hydrogen
© 2024 Association for Materials Protection and Performance (AMPP). All rights reserved. This work is protected by both domestic and international copyright laws. 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).
2024
Association for Materials Protection and Performance (AMPP)
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