1、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)ANSI B1.20.3-1976(REVISION AND REDESIGNATION OF 82.2-1968)REAFFIRMED 1998 FOR CURRENT COMMllTEE PERSONNEL PLEASE SEE ASME MANUAL AS-I 1 SECRETARIAT SOCIETY OF AUTOMOTIVE ENGINEERS THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS P
2、UBLISHED BY T H E A M E R I C A N S O C I E T Y O F 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 REAFFIRMED 2018ANSI 81.20.3-1976 31 October 1980 ACCEPTANCE NOTICE The above non-Government document was adopted (with exception listed below)o
3、n31 1980and i s approved for use by the Federal agencies.The indicated industry group has furnished the Clearance required by exfsting regulations.Copies of the document are stocked by the 000 Single Stock Point,Naval Publications and Forms Center,Philadelphia,PA 19120,for issue to DoD activities on
4、ly.Contractors and industry groups must obtain copies directly from:The American Society of Mechanical Engineers New York.NY 10017 or United Engineering Center,345 East 47th Street,The American National Standards Institute,1430 Broadway,New York.NY 10018.T i t l e of Document:Dryseal Pipe Threads (I
5、nch)Date of Specific Issue Adopted:18 November 1976 Releasing Industry Group:The American Society of Mechanical Engineers Exception:The Federal agencies use of this Standard i s subject to all the requirements and limitations of FED-STD-H28/8-Screw-Thread Standards f o r Federal Services Section 8,D
6、ryseal Pipe Threads.Military Custodians:Army-AR Navy-AS Air Force-11 Review Activities:Army-AT,AV,ER,ME,M I Navy-OS,SH.YD c i v i l Agency Coordinating Activities:Comnerce-NBS DOT-ACO,FHW.FIS.FRA,ROS GSA-FSS.PCD HUO-TCS Interior-8PA Justice-FPI NASA-JFK,LRC,MSF USOA-AFS Military Coordinating Activit
7、y:OLA-I S(Project THCS-0034)NOTICE:When reaffirmation.amendment,revision,or cancellation of this standard is initially proposed,the industry group responsible for this standard shall inform the military coordinating activity of the proposed change and request their participation.AREA THOS No part of
8、 this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.Copyright 0 1977 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U S A.FOREWORD In 1913 a Committee on the Standardization
9、of Pipe Threads was organized for the purpose of re-editing and expanding the Briggs Standard.The American Gas Association and The American Society of Mechanical Engineers served as joint sponsors.After six years of work,this committee completed the revised standard for taper pipe thread which was p
10、ublished 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 republ
11、ished in pamphlet form.In the years which followed,the need for a further revision of this American Standard becameevident 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 org
12、anized i n 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
13、 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 exten-sive appendix was added to provide additional data on the application of pipe thre
14、ads and to record in abbreviated form the several special methods which were established for gaging some of the various applica-tions 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
15、and developed as a separate standard desig-nated 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
16、rewrite of the B2.2-1968 document was undertaken with the product thread data in separate documents from the gaging standards for Dryseal Pipe threads.The system of renumbering,to include metric revisions,is as follows:ANSI B1.20.3-1976 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 n
