A comprehensive corrosion management review was conducted for a 38-inch diameter pipeline transporting dehydrated sour gas from Central Processing Facility (CPF) to downstream Gas Plant. The pipeline, which has been in service for more than ten (10) years, was constructed of bare carbon steel and equipped with a scraping facility and corrosion inhibitor injection skid that is operated by the CPF only during Tri-Ethylene Glycol (TEG) Dehydration Unit upset or off-spec conditions. After two (2) years of operations, an in-line inspection (ILI) was conducted which provided an early indication of internal corrosion that correlated with occasional process deviations and presence of solid debris in the pipeline. The study assessed the performance of existing corrosion mitigation measures and evaluated the need for continuous corrosion inhibitor injection. An enhanced corrosion mitigation plan was recommended to manage the corrosion risks during off-spec conditions.

Subject
Water, Iron sulfides, Solids, Sour gas, Pipelines, Corrosion assessment, Sludge, Dehydration, Scraping, Internal corrosion, Corrosion inhibitors, Elemental sulfur, Upset
Keywords:
Hydrogen sulfide, corrosion management, pipeline, internal corrosion, dehydrated gas, ILI
© 2023 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).
2023
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.