ASME B1.20.3-197 R2003

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~ ~~~~,INDD B1-20.3 76 W 2595512 0077959 O20 W,ANSI-B1.20.3,ADOPT1 ON NOTICE,ANSI-B1.20.3, "Pipe Threads, Inch, Dryseal," was adopted on,October 3, 1994 for use by the Department of Defense (DoD).,Proposed changes by DoD activities must be submitted to the,DoD Adopting Activity: Commanding Officer, Naval,Construction Battalion Center, Code 156, 1000 23rd Avenue,Port Hueneme, CA 93043-4301. DoD activities may obtain,copies of this standard from the Standardization Document,Order Desk, 700 Robbins Avenue, Building 40, Philadelphia,PA 19111-5094. The private,agencies may purchase copies,Standards Institute, 11 West,10036.,Custodians:,Army - GL,Navy - YD-1,Air Force - 11,DLA - IS,sector and other Government,from the American National,42nd Street, New York, NY,Adopting Activity,Navy - YD-1,AREA THDS,DISTRIBUTION STATEMENT A. Approved for public release;,distribution is unlimited.,A M E R I C A N N A T I O N A L S T A N D A R D,DryseaI Pipe Threads,(Inch),i.l-,ANSI B1.20.3 - 1976,2%. (REVISION AND REDESIGNATION 07 B2.2-1968),. . , >,SECRETARIA T,SOCIETY OF-AUTOMOTIVE ENG1 NEERS,THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS,PUBLISHED BY,T H E A M E R I C A N S O C I E T Y OF M E C H A N I C A L E N G I N E E R S,United Engineering Center 345 East 47th Street New York, N. Y. 1001 7,- _- ~- - ~~,--`,``,``,,``,,,,,`,,,``,,,`,-`-`,,`,,`,`,,`---,1_,ASME B3*20*3 76 W 2575532 0033B76 O =,No part of this document may be reproduced in any foFm, in an electronic,retrieval system or otherwise, without the prior written permission of the,publisher.,Copyright@ 1977 by,THE AMERLCAN SOCIETY OF MECHANICAL ENGINEERS,Ail Rights Reserved,Printed in U.S.A.,--`,``,``,,``,,,,,`,,,``,,,`,-`-`,,`,,`,`,,`---,ASME B 3 * 2 0 - 3 7b m 2595532 0033877 2 m,FOREWORD,In 1913 a Committee on the Standardization of Pipe Threads was organized for the purpose of reediting,and expanding the Briggs Standard. The American Gas Association and The American Society o€,Mechanical Engineers served as joint sponsors. After six years of work, this committee completed the,revised standard for taper pipe thread which was published in the ASME ¡°Transactions¡± of 1919, and,was approved as an American Standard by the then American Engineering Standards Committee (later,changed to American Standards Association) in December, 1919. It was the first standard to receive this,designation under the ASA procedure, and was later republished in pamphlet form.,In the years which followed, the need for a further revision of this American Standard became evident,as well as the necessity of adding to it the recent developments in pipe threading practice. Accordingly, the,Sectional Committee on the Standardization of Pipe Threads, B2, was organized in 1927 under the joint,sponsorship of the A.G.A. and the ASME.,During the following 15 years, several meetings were held leading to approval by the members of the,Sectional Committee, of the April 1941 draft. The revision was approved by the sponsors and ASA and,published as an American Standard in October 1942.,Shortly after publication of the 1942 standard, the Committee undertook preparation of a complete,revision. The text and tables were re-arranged and expanded to include Dryseal pipe threads, and an extensive,appendix was added to provide additional data on the application of pipe threads and to record in,abbreviated form the several special methods which were established for gaging some of the various applications,of pipe threads.,The resulting proposal was designated an American Standard on December 11, 1945. The section,covering Dryseal Pipe Threads in ASA B2.1-1945 was deleted and developed as a separate standard designated,ASA B2.2-1960, Dryseal Pipe Threads. Another updating occurred with republication as USAS B2.2-,1968.,In 1973, Standards Committee B2 was absorbed by American National Standards Institute Standard,Committee B1 and reorganized as subcommittee 20. A complete rewrite of the B2.2-1968 document was,undertaken with the product thread datain separate documents from the gaging standards for Dryseal Pipe,threads. The system of renumbering, to include metric revisions, is as follows:,ANSIB1.20.3-1976 Inch Dryseal Pipe Threads,ANSI B1.20.4-1976 Metric Dryseal Pipe Threads,ANSI B1.20.5-197 Gaging for Inch Dryseal Pipe Threads,ANSI B1.20.6-197 Gaging for Metric Dryseal Pipe Threads,Since the product thread documents are being published before completion of the new gaging standards,the gaging data in the B2.2-1968 Standard should be used until superseded by publication of the,new B 1.20.5 and B 1.20.6 gaging standards.,ANSI B1.20.3 and B1.20.4 were approved by ANSI Committee B1 for pub¡¡

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