4-4M_R2004_E1989.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.REAFFIRMED 2004FOR CURRENT COMMITTEE PERSONNELPLEASE E-MAIL CSasme.orgAN AMERICAN 1:NATIONAL STANDARD ENGINEERING DRAWING AND RELATED DOCUMENTATION PRACTICES PICTORIAL DRAWING ASME Y14.4M-1989 REVISION OF ASA Y14.4-1957(R1987)The American Society o f Mechanical Engineers 345 East 47th Street,New York,N.Y.10017-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:September 15,1989 This Standard will be revised when the Society approves the issuance of a new edition.There will be no addenda or written interpretations of the re-quirements of this Standard issued to this edition.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 Consensus 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 which provides an opportunity for additional public input from industry,academia,regulatory agencies,and thepublic-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 interpreted as government or industry endorsement of this cod0 or standard.ASME accepts responsibility for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual vol-unteers.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.Copyright Q 1989 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Resewed Printed in USA.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(This Foreword i s not a part of ASME Y14.4M-1989.)Since the first national standard for engineering drawings,Standards for Cross-Sec-tions,was published by ASME in 1914,the field of engineering documentation has stead-ily become increasingly versatile and sophisticated.Pictorial Drawing,considered a frivolous waste of time by many engineering people in those early days,emerged and proved itself a strong and viable technical communication medium during World War 11,and it has further reinforced its position in that area since that time.Ultimately,the first Pictorial Drawing standard was published in 1957.Recognizing that engineering documentation is a dynamic process,this revision en-deavors to set forth coherent and useful standards of practice,based on the progress achieved in this interesting profession.It is hoped and assumed that user groups will recognize and accept the importance of standardization and realistic uniformity in pic-torial documentation practices,while at the same time thoughtfully and consistently augmenting and supplementing these basics to satisfy the distinctive needs and applica-tions at the many and varied individual user levels.Following approval by the Y14 Committee and ASME,this Standard was approved as an American National Standard by ANSI on July 19,1989.iii 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 STANDARDS COMMITTEE Y14 Engineering Drawing and Related Documentation Practices(The following is the roster of the Committee at the time of the approval of this Standard.)OFFICERS P.E.McKirn,Chairman E.L.Kardas,Vice Chairman L.Burns,Vice Chairman M.Merker,Secretary COMMllTEE PERSONNEL A.R.Anderson D.E.Bowerman P.D.Calvin R.A.Chadderdon F.A.Christiana M.E.Curtis,Jr.H.L.Dubocq R.J.Dybas L.W.Foster H.R.Kansrnan J.J.Knopp C.G.Lance A.R.Machell,Jr.R.P.Mueller E.Niernec D.L.Ragon A.D.Signor D.Wh