The study of distortion of buried pipeline coatings has been important for a number of years and is becoming even more so as the diameter of pipe increases. Simply speaking, mechanical forces act upon buried pipeline coatings that result in the disruption and distortion of the coating. The complete understanding of the causes and cures of these actions is not so simple. I will attempt to explain my subject in light of what has been learned from my company’s research and product development and from the invaluable assistance given by many pipeline companies through numerous bell-hole inspections of buried coatings and the conclusions which they have reached as a result. I will discuss factors which contribute to the causes of soil forces and point out that there is a definite relationship between the severity of soil force damage and the diameter of the pipe. The main purpose of my discussion will be to acquaint you with the use of plastic film applied over hot enamels and the advantages these have in mitigating the effects of these forces.

Subject
Films, Pipe surfaces, Coatings, Materials, Piping, Glass, Asphalt, Wax, Force, Plastics, Soil, Coating systems, Enamels
© 1968 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).
1968
Association for Materials Protection and Performance (AMPP)
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