ASME_B16.1-1998.pdf

The American Society ofMechanical EngineersAN A ME RICAN N ATI ON AL STAN D A R DCAST IRON PIPEFLANGES ANDFLANGED FITTINGSCSSs25,125,ad250Reproduced by Global EngineeringDocuments With the Permission ofASME Under Royalty AgreementGLOBAL ENGINEERING DOCUMENTSASME B16.1-1998(Revision of ASME/ANSI B16.1-1989)No roproduction or notworking pormimod without lcanse from IHSNot for RosaloDate of Issuance:March 19,1999The 1998 edition of this Standard is being issued with an automatic addendasubscription service.The use of addenda allows revisions made in responseto public review comments or committee actions to be published on a regularyearly basis;revisions published in addenda will become effective 6 monthsafter the Date of Issuance of the addenda.The next edition of this Standardis scheduled for publication in 2003.ASME issues written replies to inquiries concerning interpretations oftechnical aspects of this Standard.The interpretations will be included withthe above addenda service.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 forAmerican National Standards.The Standards Committee that approved the code or standardwas balanced to assure that individuals from competent and concerned interests have had anopportunity to participate.The proposed code or standard was made available for public reviewand comment that provides an opportunity for additional public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not approve,rate,or endorseany item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted inconnection with any items mentioned in this document,and does not undertake to insure anyoneutilizing a standard against liability for infringement of any applicable Letters Patent,nor assumesany such liability.Users of a code or standard are expressly advised that determination of thevalidity of any such patent rights,and the risk of infringement of such rights,is entirely theirown responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not tobe interpreted as government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations issued in accordance with governingASME procedures and policies which precludes the issuance of interpretations by individualvolunteers.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 EngineersThree Park Avenue,New York,NY 10016-5990Copyright1999byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.d by IHS uo with ASMENo roproduction or notworking pormimod without lconse from IHSNot for RosaloThe increasing use of higher grades of cast iron necessitated the establishment of asecond set of ratings for the smaller sizes.A revised edition published as ANSI B16.1-1975 incorporated these new ratings along with metric(SI)equivalents for dimensions andminor corrections to the 1967 edition text.In 1982,American National Standards Committee B16 was recognized as an ASMECommittee operating under procedures accredited by ANSI.Following approval by theASME B16 Subcommittee A and B16 Committee,ANSI approved ASME/ANSI B16.1-1989 on March 8,1989.Changes included revised marking requirements,revised bolt lengthincrements in.rather than in.),elimination of metric equivalents,a correction of theClass 800 flange raised face height to 0.25 in.from the 0.06 in.shown previously,andeditorial changes to the text.In the 1998 edition of ASME B16.1,Reference Standards have been updated,a QualitySystem Program Annex has been added,Class 800 has been deleted,and several editorialrevisions have been made.Following approval by ASME B16 Subcommittee B and B16Main Committee,ANSI approved this American National Standard on November 20,1998.Requests for interpretation or suggestions for revision should be sent to the Secretary,B16 Committee,The American Society of Mechanical Engineers,Three Park Avenue,NewYork.NY10016-5990.RATINGS OF ASME B16.1 VERSUS ANSI/AWWA A21.10Attention is directed to an apparent conflict in ambient temperature pressure ratings forflanged fittings between ASME B16.1 and ANSI/AWWA A21.10,Gray Iron and DuctileIron Fittings,2 in.through 48 in.for Water and Other Liquids.The scope of ANSI/AWWA A21.10 limits that standard to fittings for use with grayiron and ductile iron pipe for water and other liquids at rated working pressures of 150psi and 250 psi.The ratings of these fittings were established on the basis of hydrostatictesting of fittings to bursting,and do provide a factor of safety of at least 3.0 at the ratedworking pressure and at ambient temperature.ASME B16.I covers both separate flanges and flanged fittings for more general serviceat ambient and elevated temperatures.The pressure ratings set forth are not based uponburst strength,but have evolved over an extended period of time of satisfactory performancein a wide range of general service conditions.The ratings encompass pressure combinedwith elevated temperature,stresses imposed by piping,thermal stresses due to temperaturevariations,and many other conditions causing stress in the flange or fitting.ivo with ASMENo roproduction or notworking pormimod without lconse from IHSNot for HosaloASME B16 COMMITTEEStandardization of Valves,Flanges,Fittings,Gaskets,and Valve Actuators(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSW.N.McLean,ChairH.R.Sonderegger,Vice ChairP.A.Reddington,SecretaryCOMMITTEE PERSONNELW.L.Ballis,Consultant,London,OhioR.W.Barnes,Anric Enterprises,Etobicoke,Ontario,CanadaR.R.Brodin,Fisher Controls International,Inc.,Marshalltown,lowaM.A.Clark,Nibco,Inc.,Elkhart,IndianaA.Cohen,A.Cohen and Associates,Albuquerque,New MexicoC.E.Floren,Mueller Co.,Decatur,lllinoisD.R.Frikken,Solutia,Inc.,St.Louis,MissouriR.Henrich,Minnegasco,Inc.Golden Valley,MinnesotaJ.C.Inch,Mueller Refrigeration Products Co.,Hartsville,TennesseeG.A.Jolly,Vogt Valve Co.,Louisville,KentuckyW.G.Knecht,BW/IP International,Inc.,Williamsport,PennsylvaniaR.Koester,The William Powell Co.,Cincinnati,OhioW.N.McLean,Newco Valves,Palos Park,lllinoisM.L.Nayyar,Bechtel Power Corp.,Gaithersburg,MarylandP.A.Reddington,American Society of Mechanical Engineers,New York,New YorkR.A.Schmidt,Trinity-Ladish Co.,Russellville,ArkansasH.R.Sonderegger,Grinnell Corp.,Cranston,Rhode IslandW.M.Stephan,Flexitallic,Inc.,Mount Laurel,New JerseyT.F.Stroud,Ductile Iron Pipe Research Association,Birmingham,AlabamaM.D.Wasicek,ABS Americas,Houston,TexasR.E.White,Richard E.White and Associates,South Bend,IndianaD.A.Williams,Southern Company Services,Birmingham,AlabamaL.A.Willis,The Dow Chemical Co.,Freeport,TexasW.R.Worley.Union Carbide Corp.,South Charleston,West VirginiaSUBCOMMITTEE B-THREADED FITTINGS(EXCEPT STEEL)H.R.Sonderegger,Chair,Grinnell Corp.,Cranston,Rhode IslandB.P.Feder,Secretary,American Society of Mechanical Engineers,New York,New YorkK.Barron,Ward Manufacturing,Blossburg.PennsylvaniaM.A.Clark,Nibco,Inc.,Elkhart,IndianaA.Cohen,A.Cohen and Associates,Albuquerque,New MexicoA.A.Knapp,Canadian Copper/Brass Development Association,North York,Ontario,CanadaR.L Larkin,American Darling Valve,Birmingham,AlabamaP.I.McGrath,Jr.,Consultant,Birmingham,AlabamaW.N.McLean,Newco Valves,Palos Park,lllinoisJ.K.Schultz,Conine Manufacturing Co.,Inc.,Tyler,Texas。，o with ASMENo roproduction or notworking pormimod without lcense from IHSNot for Rosale