1、AN AMERICAN NATIONAL STANDARDPreferred Metric Equivalentsof Inch Sizes for TubularMetal Products OtherThan PipeANSI/ASME B32.6M-1984(REVISION OF ANSI B32.6-1977)REAFFIRMED 1994FOR CURRENT COMMITTEE PERSONNELPLEASE SEE ASME MANUAL AS-11SPONSORED AND PUBLISHED BYTHE AMERICAN SOCIETY OF MECHANICAL ENGI
2、NEERSUnited Engineering Center 345 East 47th StreetNew York,N.Y.10017FOREWORDThis Foreword is not part of ANSI/ASME B32.6M-1984.)The U.S.Department of Commerce in its July 1971 report to Congress titled,A MetricAmerica-A Decision Whose Time has Come,recommended that the United States shouldchange to
3、 the metric system through a coordinated national program.This action along withsubsequent increased metric activity in industry resulted in a number of requests from pro-ducers and users that the B32 Committee develop a preferred series of metric sizes for thevarious forms of wrought mill metal pro
4、ducts.On January 17,1973,Subcommittees I and 2 were formed to establish preferred metric sizesof solid flat and round metal products,respectively.Subsequently Subcommittee 2 had itsscope enlarged to include solid,square,and hexagon products.Subcommittee 4 was formed onOctober 24,1973 to consider tub
5、ular products.Pipe products were excluded as they are underthe jurisdiction of the ANSI B36 Committee.These Committees are composed of representa-tives of the major metal trade associations and user groups.After several meetings,consensus agreement was reached by Subcommittee 4 on the pre-ferred met
6、ric sizes for tubular metal products.Several considerations guided the Subcommittee:ISO preferred number sizes,sizes actually used in metric countries,and the need for roundedmetric equivalents of high activity inch sizes.The Subcommittee agreed to provide two sequentially numbered comparison standa
7、rds,onespecifying metric sizes designated ANSI B32.5,and one specifying metric equivalents of inchsizes designated ANSI B32.6.This latter standard reflects the metrication of commonly usedinch sizes.The proposals received Standards Committee B32 approval on March 30,1977,and was ap-proved as an Amer
8、ican National Standard on August 12,1977.The present edition was approved as an American National Standard on December 28,1984.进ASME STANDARDS COMMITTEE B32Standardization of Metal and Metal Alloy Wrought Mill Product Nominal Sizes(The following is the roster of the Committee at the time of approval
9、 of this Standard.)OFFICERSA.Cohen,ChairmanW.R.Daisak,SecretaryCOMMITTEE PERSONNELALUMINUM ASSOCIATION,THEJ.D.Yerger.Jr.,Aluminum Company of America,Pittsburgh,PennsylvaniaJ.W.Barr,A/ternate,The Aluminum Association,Washington,D.C.AMERICAN IRON AND STEEL INSTITUTED.E.Ballantyne,Copperweld Steel Co.,
10、Warren,OhioB.C.Jennings,Jones Laughlin Steel Corp.,Pittsburgh,PennsylvaniaAMERICAN SOCIETY FOR METALSC.D.Loyd,Caterpillar Tractor Co.,Peoria,ItlinoisAMERICAN SOCIETY OF MECHANICAL ENGINEERS,THEA.R.Machell,Jr.,Webster,New YorkCOPPER DEVELOPMENT ASSOCIATION,INC.A.Cohen,Copper Development Association,I
11、nc.Greenwich,ConnecticutFARM AND INDUSTRIAL EQUIPMENT INSTITUTER.J.Christ,Deere Company,Motine,lilinoisMETAL CUTTING TOOL INSTITUTER.M.Byrne,Metaf Cutting Tool Institute,Tarrytown,New YorkMOTOR VEHICLE MANUFACTURERS ASSOCIATIONJ.E.Howkins,Rouge Steel Co.,Dearborn,MichiganNATIONAL ELECTRICAL MANUFACT
12、URERS ASSOCIATIONJ.F.Prengeman,Westinghouse Electric Corp.,Pittsburgh,PennsylvaniaH.B.Stauffer,A/ternate,National Electrical Manufacturers Association,Washington,D.C.NATIONAL SCREW MACHINE PRODUCTS ASSOCIATIONH.A.Eichstaedt,National Screw Machine Products Association,Brecksville,OhioSOCIETY OF MANUFACTURING ENGINEERSG.W.Kurasz,Associated Spring Barnes Group,Inc.,Bristol,ConnecticutSTEEL SERVICE CENTER INSTITUTEL.T.Johnston,Central Steel Wire Co.,Chicago,HllinoisTELEPHONE GROUP,THER.J.Hibbeln,Western Electric Co.,Chicago,Iltinois