Sliding pressure operation is employed by utilities to optimize efficiency during periods of reduced load demand. However, this mode of operation can lead to a deterioration in boiler tube integrity. The various mechanisms involved and their effects on tube integrity are discussed. Case histories are also provided, which illustrate these phenomena.

Subject
Vapor pressure, Water, Salts, Metal surfaces, Tubes, Acidity, Phosphates, Oxide surfaces, Pressure, Metals, Boilers, Deposit corrosion, Steam
Keywords:
Sliding Pressure, Waterwall, Erosion-Corrosion, Thermal Fatigue, Phosphate Treatment Programs, Caustic Corrosion, Phosphate Hideout, Hydrogen Damage, Steam Blanketing, Departure From Nucleate Boiling (DNB)
© 1996 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).
1996
Association for Materials Protection and Performance (AMPP)
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