ASME_B16.25-97
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ID： |
3FDF2902D47B46B69DC25680742537B5 |
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文件大小(MB)： |
0.43 |
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页数： |
24 |
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文件格式： |
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日期： |
2007-6-12 |
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购买： |
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）：
The American Society of,Mechanical Engineers,A M E R I C A N N A T I O N A L S T A N D A R D,(Revision of ASME 81 6.25-1 992),Date of Issuance: May 30, 1997,The 1997 edition of this Standard is being issued with an automatic addenda,subscription service. The use of an addenda allows revisions made in,response to public review comments or committee actions to be published,as necessary; 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 2002.,ASME issues written replies to inquiries concerning interpretations of,technical aspects of this Standard. The interpretations will be included with,the above addenda service. Interpretations are not part of the addenda to,the Standard.,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 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 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 the determination of,the validity of any such patent rights, and the risk of the infringement of such rights, is entirely,their own responsibility.,Participation by federal agency representativek) 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 only those interpretations issued in accordance with governing,ASME procedures and policies which preclude 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,345 East 47th Street, New York, NY 10017,Copyright O 1997 by,THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS,All Rights Reserved,Printed in U.S.A.,FOREWORD,(This Foreword is not part of ASME 016.25-1997.),In July 1953, the American Welding Society presented a proposal on Welding End,Preparation to Sectional Committee B16 of the American Standards Association (ASA),with the recommendation that it be considered as a candidate American Standard. The,proposal was expanded to include welding preparation for flanges and valves covered by,ASA B16.5, Steel Pipe Flanges and Flanged Fittings, and for fittings covered by ASA,B16.9, Buttwelding Fittings. Consideration was also given to Pipe Fabrication Institute,Standard ES- 1.,The third draft reviewed by Subcommittee 3, Subgroup 6 (now Subcommittee F) of the,B 16 Sectional Committee was forwarded to the Committee, to the cosponsor organizations,and then to ASA for approval. Final approval was given on September 14, 1955, with the,designation ASA B 16.25-1955.,Revisions were developed as need for clarification and improvement became known, and,were approved as ASA B 16.25-1958 and ASA B16.25-1964. After ASA reorganized as,the American National Standards Institute (ANSI) and the Sectional Committee became,American National Standards Committee B16, a further revision was approved as ANSI,B 16.25-1972.,Subcommittee F immediately began work on a major expansion and updating of the,standard, adding illustrations and requirements for welding end configurations applicable to,a number of specific circumstances, including cast steel and alloy valves. When a draft,had been developed that overcame the many problems and conflicting demands, the Standards,Committee, cosecretariat organizations, and ANSI concurred in approval of ANSI B16.25-,1979 on July 18, 1979.,In 1982, American National Standards Committee B16 was reorganized as an ASME,Committee operating under procedures accredited by ANSI. In the 1986 edition, inch,dimensions were established as the standard and numerous changes in text and format were,made. Notes fo……
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