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.34#E m s The American Society of Mechanical Engineers A N AMERICAN NATIONAL STANDARD CAST
2、IRON FITTINGS FORSOVENT DRAINAGESYSTEMS ASME BlB.451 UN8(Revision of ASME BM.45-1987)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
3、of Issuance:April 30,1999 The 1998 edition of this Standard is being issued with an automatic addenda subscription service.The use of addenda allows revisions made in response to public review comments or committee actions to be published on a regular yearly basis;revisions published in addenda will
4、 become effective six months after the Date of Issuance of the addenda.The next edition of this Standard is scheduled for publication in 2003.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard.The interpretations will be included with the above
5、addenda service.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 t
6、hat 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 the public-at-large.AS
7、ME 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
8、against liability for infringement of any applicable Letters Patent,nor assumes 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.Participa
9、tion by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.ASME accepts responsibility for onlythose interpretations issued in accordance with governing ASME procedures and policies which preclu
10、des the issuance of interpretations by individual volunteers.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 10016-59
11、90 Copyright 0 1999 by THE AMERICAN SOCIETY OF MECHANICAL 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.Uncontrolle
12、d when printed.FOREWORD(This Foreword is not part of ASME 616.45-1998)In the spring of 1920,the American Engineering Standards Committee(later successively named American Standards Association,United States of America Standards Institute,and American National Standards Institute)authorized the organ
13、ization of a Sectional Committee(later named Standards Committee)on the Standardization of Pipe Flanges for the purpose of unifying and further developing the flanged and threaded fitting standards in force in the United States.Designated as joint sponsors were the American Society of Mechanical Eng
14、ineers,the Heating and Piping Contractors National Association(later the Mechanical Contractors Association of America),and the Manufacturers Standardization Society of the Valve and Fittings Industry.In 1982,American National Standards Committee B16 was reorganized as the ASME B16 Committee,with AS
15、ME operating as sole sponsor under procedures accredited by ANSI.The Sovent system for plumbing drainage systems was developed in Switzerland,in 1961,by Mr.Fritz Sommer.Patent rights for the United States,where the system is finding use in high rise developments,were obtained in late 1969.The Manufa
16、cturers Standardization Society of the Valve and Fittings Industry developed and approved SP-74 in September 1970.A few months later,the MSS publication was submitted to Standards Committee B16,whose Subcommittee 9(now Subcommittee J)gave prompt approval to the proposal.After Standards Committee approval,some delay was encountered in providing necessary assurances to ANSI,but approval was finally granted to ANSI B16.32-1973,Cast Copper Alloy Solder Joint Fittings for Sovent Drainage Systems.Appr
