This paper discusses the possible use of a dual powder system, the latest external coating for buried steel pipe. The suitability of dual powder system for high mechanical properties (gouge resistance, impact resistance, penetration resistance, etc.) and/or heat resistance are discussed. The advantages includes easy plant application process, high quality, easy repair and its suitability for joint coatings, etc compared to single layer fusion bonded epoxy resin coating, coal tar enamel and three layer polyethylene. Some cases that dual powder system was used in China pipeline construction projects were introduced too.

Subject
Materials, Piping, Pipelines, Field joint coatings, Fusion bonded epoxy coating, Mechanical properties, Epoxy coatings, Powder coatings, Powders, Corrosion protection, Corrosion resistance, Bituminous coatings, Abrasion resistance
Keywords:
Dual powder system, Pipeline, coatings
© 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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