Task Group T-5B-6, under the direction of Group Committee T-5B for High Temperature Materials Performance, has conducted a survey by mail questionnaire devoted to the performance of tubing and fittings in Ethylene and Olefins Pyrolysis Furnaces. The purpose of the survey is to clarify the fragmentary reports about relative life of radiant tubing and fittings by collating information from a large number of ethylene production plants. Included in the survey is relative performance of seven alternative alloys, modes of deterioration, such as carburization and rupture, operational background, inspection and repair. The report is dedicated to materials, operations and process engineers associated with the petrochemical industry. Sixteen ethylene producers reported on experience in 28 plants. Tube and fitting life varies from six months to ten years depending on location in the coil, skin temperature and other variables. Carburization accelerated stress rupture, bulging, bowing, cracking and erosion are the prevalent forms of degradation.

Subject
Sulfur, Carburization, Pyrolysis, Nickel based alloys, Tubes, Fittings, Walls, Furnaces, Tubing, Ethylene, Surveys, Cracking, Alloys
© 1981 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).
1981
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.