_PTC_39_Edtn_2005.pdf

AN AMERICAN NATIO NAL STANDAR DSteamTrapsASME PTC 39-2005(Revision and Redesignation of ASME PTC 39.1-1980)Performance Test CodesCopyrighted 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 39-2005(Revision and Redesignation of ASME PTC 39.1-1980)Steam TrapsThree Park Avenue New York,NY 10016AN AMERICAN NATIONAL STANDARDPerformance Test CodesCopyrighted 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:November 11,2005This Code will be revised when the Society approves the issuance of a new edition.There will be noaddenda issued to ASME PTC 39-2005.ASME issues written replies to inquiries as code cases and interpretations of technical aspects of thisdocument.Code cases and interpretations are published on the ASME Web site under the CommitteePages at http:/www.asme.org/codes/as they are issued.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 Stan-dards.The Standards Committee that approved the code or standard was balanced to assure that individuals from com-petent and concerned interests have had an opportunity to participate.The proposed code or standard was made avail-able 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 itemsmentioned in this document,and does not undertake to insure anyone utilizing a standard against liability for infringe-ment of any applicable letters patent,nor assume any such liability.Users of a code or standard are expressly advisedthat determination of the validity of any such patent rights,and the risk of infringement of such rights,is entirely theirown responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as gov-ernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME 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 EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted 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.CONTENTSNotice .vForeword.viCommittee Roster .viiCorrespondence With the PTC 39 Committee .ixIntroduction .xSection 1Object and Scope .11-1Scope .11-2Object.11-3Uncertainty Analysis .1Section 2Definitions and Descriptions of Terms .12-1General.12-2Steam Trap.12-3Capacity of a Steam Trap.12-4Pressure .12-5Inlet Subcooling .22-6Subcooled Condensate.2Section 3Guiding Principles .23-1Items on Which Agreement Shall Be Reached.23-2Qualifications of Person Responsible for the Test .23-3Duties of Person Responsible for the Test .23-4Procedures and Test Apparatus.23-5Tests.23-6Calibration of Instruments.23-7Data Sources.23-8Adjustments During Test.23-9Records and Test Results .23-10 Calculations .2Section 4Instruments and Methods of Measurement.34-1General.34-2Calibration of Instruments and Apparatus .34-3Temperature.34-4Pressure .34-5Flow Measurements.34-6Time Intervals .44-7Steam Loss Tests .44-8Condensate Capacity Tests .74-9Air and Noncondensible Gas Removal Tests.12Section 5Computation of Results .165-1Correction of Measured Variables .165-2Use of Formula Symbols .165-3Steam Loss Calculations.16Section 6Report of Test.176-1General Information.176-2Detailed Information .17iiiCopyrighted 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.Section 7References .19Figures1Test Arrangement for Steam Loss Tests.52Condensate Capacity Test Arrangement .73Recommended Pressure Connection .84Air and Noncondensible Gas Handling Capability Test Arrangement .14Forms1Data Log for Steam Loss Tests:No Loads or Condensate Load .62Data Log for Capacity Test:Accumulator Level Measurement.93Calculation of Condensate Cap