13-1_Edtn_2007.pdf

Scheme for the Identification of Piping SystemsAN AMERICAN NATIO NAL STANDARDASME A13.1-2007Revision of ASME A13.1-1996(R2002)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 A13.1-2007Revision of ASME A13.1-1996(R2002)Scheme for theIdentification ofPiping SystemsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyrighted 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:April 4,2007The next edition of this Standard is scheduled for publication in 2012.There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org 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 NationalStandards.The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate.The proposed code or standard was madeavailable forpublic review andcomment thatprovides an opportunityfor additional publicinput 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 anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assume any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment 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 2007 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.CONTENTSForeword.ivCommittee Roster.vIntroduction.vi1Object and Scope.12Definitions and References.13Method of Identification.1Figure1Location of Identification Markers.2Tables1Examples of Content Descriptions Appearing in a Legend.12Designation of Colors.23Size of Legend Letters.2iiiCopyrighted 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.FOREWORDThis is a revision of the Scheme for the Identification of Piping Systems,originally affirmedin 1928;reaffirmed in 1945;revised in 1956,1975,and 1981;reaffirmed in 1985 and 1993;revisedin 1996,reaffirmed in 2002,and revised in 2007.Shortly after the turn of the twentieth century,with the resultant industrial expansion,itbecame apparent that some scheme should be devised to identify piping.In 1908,an article on“Identification of Power House Piping by Colors”was read at a meeting of The American Societyof Mechanical Engineers.In 1909,an article called“Standard Colors for Power Station Piping”was read at the meeting of the Association of Edison Illuminating Companies.In 1920,the National Safety News pointed out the need for a color scheme for pipelines,andthe following year several papers were published and reports made to various committees,notably,the Prime Movers Committee of the National Electric Light Association,The AmericanSociety of Mechanical Engineers,and the U.S.Navy Department.In the meantime,many large companies compiled their own scheme with no thought tostandardization of pipe colors,even in their own plants.When personnel were shifted,accidentscould and did happen.The organization of the Sectional Committee on the Identification of Piping Systems,under theprocedure of the American Standards Assoc