In the Netherlands a 485 km (300 mi.), 48 inch diameter, high pressure (8 Mpa, 1200 PSI), natural gas pipeline is being constructed. A large part (> 15%) of the pipeline is constructed trenchless in which horizontal directional drillings (HDD) up till 1400 m (4600 feet) length are used. This way of constructing is not only demanding from a construction point of view but also set high demands on the quality and strength of the coating of the steel pipes that is used. For this task, dedicated mill and field joint coating systems were selected. Partly the selected coating systems are new in the industry.

In the paper an overview is given of:

  • the different constructions used and the demands they deliver for the coating

  • the coating systems chosen, both mill and field coating

  • the quality checks involved

  • tests and results

  • experiences, conclusions and outlook for the future.

Subject
Coating application, Coatings, Piping, Pipelines, Fusion bonded epoxy coating, Pipe sections, Steel, Construction, Contractors, Coating defects, Horizontal directional drilling, Impressed current, Coating systems
Keywords:
coating, North-South pipeline, horizontal directional drillings, quality checks, coating experiences
© 2012 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).
2012
Association for Materials Protection and Performance (AMPP)
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