1、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 12.1-2000 Revision of ANSVASME PTC 12.1-1978(R 1987)Closed Feedwater Heaters Copy
2、righted 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 29,2000 This Standard will be revised when the Society approves I th
3、e issuance of a new edition.There will be no Addenda issued to ASMEPTC 12.1-2000.Please Note:ASME issues written replies to inquiries concerning interpretation of technical aspects of this document.The interpretations are nota part of the document.ASME is the registered trademark of The American Soc
4、iety of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American National Standards.The Standards Committee that approyed the code or standard was balanced to assure that individuals from competent and concerned,interests have had an o
5、pportunity to participate.The ,proposed code or standard was made available for public review and comment which 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,proprieta
6、ry device,or activity.ASME does not take any position with respect to the vdidity of any patent rights assefled inconnection with any items mentioned in this document,and does,r$ot undertake to insure anyone Litilizing a standard against liability for infringement of any applicabke letfers patent,no
7、r 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)-gr:pirCon(s)affiliated with in
8、dustry is not to be interpre-ted as government or industry endorsement of this iodq or standard.ASME accepts responsibility for only those intwprefidtions of this document issued in accordance with the established ASME procedures and policies,which precludes the issuance of interpretations by indivi
9、duals.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 1001 6-5990 Copyright 0 2000 by THE AMERICAN SOCIETY OF MECHANI
10、CAL ENGINEERS All Rights Reserved Printed 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 The Performance Test Code Comm
11、ittee 12.1 was assembled to review,edit,and update the existing 1978 Code edition.The Code has been extensively revised to comply with the latest requirements in the PTC 1-1991,General Instructions,including the required uncertainty analysis.This Code incorporates a revised calculation procedure,inc
12、luding examples.The calculation method requires iterations and can be performed manually but is best done by using a computer program.The Code also incorporates an alternative for using ultrasonic flow measurement techniques to test individual or split-string feedwater heaters,when flow nozzles are
13、not available.This edition of the Code provides a relatively simple but accurate method of calculating the performance of a heater utilizing the Code procedure with a minimum knowledge of the design characteristics of the heater.This version was approved by the Board on Performance Test Codes on Feb
14、ruary 23,2000 and as an American National Standard by the ANSI Board of Standards Review on May 23,2000.Ill 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.Uncontro
15、lled when printed.!I NOTICE All Performance Test Codes MUST adhere to the re,quirements of P5C-.l,GENERAL INSTRUCTIONS.The following information is.based on that documeni and its imluded here for emphasis and for the convenience b(the user of th-is Code.It is expected-that-the Code user is fully cog
16、nizant of Parts I and Ilkof PTC 1 and has-.read them.prior to applying this Code.ASME Performance Test Codes provide test procedures which yield.results ofthe highes.t level of accuracy consistent with the best engineering knowledge and practice.currently available.They were developed by balanced committees,representing all.concerned inter-ests.They specify procedures,instrumentation;equipmentoperating requirements,caicula-tion methods,and uncertainty analysis.When tests are run in accordance wi