ASME_PTC-12-5-2000.pdf

Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME PTC 12.5-2000 Single Phase Heat Exchangers Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of issuance:December 31,2001 This Standard will be revised when the Society approves the issuance of a new edition.There will be no addenda issued to ASME PTC 12.5-2000.Please note:ASME issues written replies to inquiries concerning interpretation of technical aspects of this document.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American National Standards.The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate.The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not“approve,”rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent,nor assume any such liability.Users of a code or standard are expressly advised that determination of the validity of any such patent rights,and the risk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpre-ted as government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical Engineers Three Park Avenue,New York,NY 10016-5990 Copyright Q 2001 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Primed in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.FOREWORD Performance tests of industrial heat exchangers are often conducted to compare test results with manufacturer s rating data,to evaluate the cause(s)of degradation,to verify regulatory compliance,or to assess process improvements.All tests have associated costs.Those costs can be great if the test results are inconclusive.Historically,testing heat exchanger performance in operating processes was not conducted according to standard,acceptable methods;therefore,the results were inconsistent.Many of the unacceptable results have been attributed to small deviations in test conditions and measurement prac-tices.In other cases,analysis of the data did not consider all factors which affect performance.As industry implements improvements to reduce costs and increase output,performance margins of process streams tend to be reduced.The need for accurate performance test methods is increasing to meet the commercial demand.A single consistent test philosophy and methodology including measurement and analysis techniques for delivery of accurate and repeatable heat exchanger test data would provide a foundation to assess performance.Such a test standard has wide applicability in the power,food-processing,chemical and petroleum industries,among others.It was with the intent of satisfying these industry needs that the Board on Performance Test Codes(BPTC)authorized the formation of the PTC 12.5 Committee to explore the development of the present Code.The PTC 12.5 Committee began its deliberations late in 1994.An early version of the draft code was subjected to a thorough review by industry,including members of the BPTC.Comments were incorporated in the version which was approved by the Committee on 11 August 1999.PTC 12.5-2000 on Single Phase Heat Exchangers was then approved as a Standard practice of the Society by action of the Board on Performance Test Codes on 8 May 2000.It was approved as an American National Standard by the ANSI Board of Standards Review on September 26,2000.(Revised 26 September 2000).III Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on