Measurements of the localized flow patterns, flow characteristics, and corrosion rates using high-precision, non-intrusive flow and corrosion/erosion ultrasound system have been made at various locations along the field pipeline.

The field pipeline is schedule 40, a 20 cm diameter, multiphase carbon steel flowline which transports oil, water and some gas. The total elevation change is about 19 m.

The flow pattern and its characteristics (e.g. height of the liquid film) were monitored and corresponding high levels of corrosion were measured there.

The flow regime changed dramatically along the pipeline due to the nature of the topography of field pipeline. It is noticed that there are slugs present in the pipe even though the pipe is downwardly declined. .

Slug flow was noticed in the initial sections of the pipe and these were formed due to the dip in the pipe there. The corrosion rate here was between 0.5 and 0.8 mm/year.

This paper describes the localized flow and corrosion in hilly terrain field pipelines.

Subject
Flow patterns, Piping, Flow characteristics, Corrosion rate, Flow velocity, Slug flow, Pipelines, Gas velocity, Liquid films, Transducers, Flowrate, Liquids, Flow regime
Keywords:
corrosion rates, flow pattern, localized flow, flow characteristics, ultrasound, hilly terrain
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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