Aguapara Calderas

PARA CRTD- Vol. 34

CONSENSUS ON OPERATING PRACTICES FOR THE CONTROL OF FEEDWATER AND BOILER WATER CHEMISTRY IN MODERN INDUSTRIAL BOILERS

prepared by the FEEDWATER QUALITY TASK GROUP for the INDUSTRIAL SUBCOMMITTEE OF THE ASME RESEARCH AND TECHNOLOGY COMMITTEE ON WATER AND STEAM IN THERMAL POWER SYSTEMS

THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Three Park Avenue s New York, New York10016

Statement from By-Laws: The Society shall not be responsible for statements or opinions advanced in papers...or printed in its publications (7.1.3) Authorization to photocopy for internal or personal use is granted to libraries and other users registered with the Copyright Clearance Center (CCC) provided $3/article or $4/page is paid to CCC, 222 Rosewood Dr., Danvers, MA 01923. Requestsfor special permission or bulk reproduction should be addressed to the ASME Technical Publishing Department.

ISBN No. 0-7918-1204-9 Library of Congress Number 94-70878 (Reprinted With Editorial Corrections 1998) Copyright © 1994 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.

Ì PREFACE Ì
The Industrial Subcommittee of the ASME Research and TechnologyCommittee on Water and Steam in Thermal Power Systems, under the leadership of Mr. James O. Robinson of Betz Laboratories, Inc., has revised the Consensus on Operating Practices for the Control of Feedwater Boiler Water Chemistry in Modern Industrial Boilers, first published in 1979. Revision of the original document was completed by a task group of this Subcommittee under the guidance of Mr. RobertT. Holloway of Nalco Canada Inc. The task group consisted of a cross section of manufacturers, operators, and consultants involved in the fabrication and operation of industrial boilers. Members of this group are listed in the acknowledgments. This current document is an expansion and revision of the original, with reordered and modified texts where considered necessary. While significantrevisions have been incorporated, it is recognized that there are areas of operating practice not addressed herein. Additional information is available from other sources based on experience gained in utility boiler operation in the power generation industry [20-22]. It is the plan of the ASME Research Committee to continue to review this information, and revise and reissue this document as necessary tocomply with advances in boiler design and water conditioning technology.

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Ì ACKNOWLEDGEMENTS Ì
This document was revised by the Feedwater Quality Task Group for the Industrial Subcommittee of the ASME Research and Technology Committee on Steam and Water in Thermal Power Systems. Recognition is hereby given to the following members of these groups for their contributions inpreparing the document.

Feedwater Quality Task Group
Robert T. Holloway, Chairman Jesse S. Beecher Wayne E. Bernahl Deborah M. Bloom Irvin J. Cotton Robert J. Cunningham Douglas B. DeWitt-Dick S. B. Dilcer, Jr. Arthur W. Fynsk C. R. Hoefs R. W. Lane Jerome W. McQuie D. E. Noll Charles R. Peters F. J. Pocock James O. Robinson Joseph J. Schuck K. Anthony Selby J. W. Siegmund David E. Simon II P. M.Thomasson T. J. Tvedt, Jr. J. F. Wilkes

Industrial Subcommittee
James O. Robinson, Chairman Anton Banweg T. Beardwood Jesse S. Beecher James C. Bellows, Ph.D. Wayne E. Bernahl Deborah M. Bloom Irvin J. Cotton Robert J. Cunningham David Daniels Douglas B. DeWitt-Dick S.B.Dilcer,Jr. Arthur W. Fynsk F. Gabrielli S. Goodstine Karl W. Herman Robert T. Holloway K. Kelley R. W. Lane P. J. Latham RogerV. Long D. E. Noll Thomas H. Pike F. J. Pocock L. Rosenzweig J. K. Rice J. J. Schuck John W. Siegmund David E. Simon II P. M. Thomasson T. J. Tvedt, Jr. John R. Webb W. Willsey J. F. Wilkes David K. Woodman

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ASME Research and Technology Committee on Steam and Water in Thermal Power Systems
Otakar Jonas, Chairman William R. Greenaway, 1st Vice Chairman Torry.). Tvedt, Jr., 2nd Vice...