ASME B16[1].39-1998
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ID： |
796660FA586048209B2203F7220018DF |
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文件大小(MB)： |
0.68 |
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页数： |
20 |
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文件格式： |
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日期： |
2013-6-1 |
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文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
COPYRIGHT American Society of Mechanical Engineers,Licensed by Information Handling Services,The American Society of,Mechanical Engineers,A N A M E R I C A N A T I O N A L S T A N D A R D,MALLEABLE IRON,THREADED PIPE UNIONS,Classes 150,250, and 300,ASME B1 6.3N-1 NU8,(Revision 01 ASMVANSI B1 6.39-1 886),COPYRIGHT American Society of Mechanical Engineers,Licensed by Information Handling Services,Date of Issuance: December 31, 1998,The 1998 edition of thisS tandard is being issued with an automatic addenda,subscription service. The use of addenda allows revisions made in response,to public review commenotsr committee actionst o be published ona regular,yearly basis; revisions published in addenda will become effective 6 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 interpretationso f,technical aspects of this Standard. The interpretations will be included with,the above addenda service.,ASME is the registered trademark of The American Society of Mechanical Engineers.,This code or standard wadse veloped under procedures accrediteda s meeting the criteria for,American National Standards. The Standards Committee that approved the code or standard,was balanced to assure that individuals from competent and concerned interests have had an,opportunity top articipate. The proposed codoer standard was made available for public review,and comment that provideasn opportunity for additional public input from industarcya, demia,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 withr espect to the validity of any patent rightsa sserted in,connection witha ny items mentionedi n this document, and does not undertaketo insure anyone,utilizing a standard against liabilityfor infringemeonf ta ny applicable LetterPsa tent, 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.,Participation by federaal gency representative(s) or person(s) affiliatedw ith industry is notto,be interpreted as government or industry endorsement of this code or standard.,ASME accepts responsibilityforonly those interpretations issuiend a ccordance with governing,ASME procedures and policies which precludes 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 10016-5990,Copyright O 1998 by,THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS,All Rights Reserved,Printed in U.S.A.,COPYRIGHT American Society of Mechanical Engineers,Licensed by Information Handling Services,STD-ASME BLb-37-ENGL L798 0757b70 Ob08227 58b m,FOREWORD,(This Foreword is not part of ASME B16.39-1998.),In 1921, the American Engineering Standards Committee, later the American Standards,Association (ASA), now the American National Standards Institute (ANSI), authorized the,organization of a Sectional Committee on the Standardization of Pipe Flanges and Flanged,Fittings, with the following organizations as joint sponsors: Heating, Piping, and Air,Conditioning Contractors National Association, later the Mechanical Contractors Association,of America (MCAA); Manufacturers Standardization Society of the Valve and Fittings,Industry (MSS); and the American Society of Mechanical Engineers (ASME).,Threaded fittings were added to the scope of the BI6 Committee, and Subcommittee No.,2 (now Subcommittee B) was made responsible for threaded fittings other than steel.,Standards for cast and malleable iron fittings were approved by ASA as early as 1927.,For many years, the need for standardization of threaded malleable iron unions was met,by Federal Specifications (published by the General Services Administration) and other,documents published by the Association of American Railroads (AAR) and the Underwriters,Laboratories (UL). As these standards continued to diverge, however, manufacturers concluded,that a common practice would be desirable. Accordingly, beginning in 1967, MSS developed,a standard practice embodying features of the existing standards and published it as MSS,During the next few years, ANSI recognition of the AAR and UL standards was withdrawn,in favor of SP-76, and in 1975 MSS submitted its standa……
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