Asbestos-filled furan and phenolic plastics have been in use for many years to solve the corrosion problems of the chemical process industry. Specifically, Haveg 41 and Haveg 61 materials have proven service applications in the dye industry, manufacture of alum, digestion of ores, by-product HCl process, and numerous others. However, stricter government regulations regarding the handling of asbestos, as well as problems with reliable sources of the fiber, prompted a search for substitute fillers. Many fillers were evaluated, but no single filler possessed the unique properties of asbestos. Finally, a blend of silicate-type fillers was developed, employing the same basic phenolic and furan resins used in the former Haveg 41 and 61 materials. These new grades of Haveg, called 41-NA and 61-NA, actually possess improved physical properties and, in most cases, equivalent corrosion resistance. Haveg NA equipment is now in service in our own plant as well as in customers' plants. The longest exposure for Haveg NA equipment to date has been two years and no problems have been experienced.

Subject
Acids, Materials, Phenols, Manufacturing, Chemical resistance, Fibers, Equipment, Asbestos, Corrosion resistance, Furan, Chlorides, Modulus of elasticity, Resins
© 1981 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).
1981
Association for Materials Protection and Performance (AMPP)
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