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AN AMERICAN NATIO NAL STANDARDLine BlanksASME B16.48-2005(Revision of ASME B16.48-1997)Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16.48-2005(Revision of ASME B16.48-1997)Line BlanksAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance:January 16,2006The next edition of this Standard is scheduled for publication in 2010.There will be no addenda orwritten interpretations of the requirements of this Standard issued to this edition.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 NationalStandards.The Standards Committee that approved the code or standard was balanced to ensure that individuals fromcompetent and concerned interests have had an opportunity to participate.The proposed code or standard was madeavailable forpublic review andcomment thatprovides an opportunityfor additional publicinput 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 anyitems mentioned in this document and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assume any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies,which precludes the issuance of interpretations by individuals.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 10016-5990Copyright 2006 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-CONTENTSForeword.ivCommittee Roster.v1Scope.12Pressure-Temperature Ratings.13Design.24Dimensions.25Materials.36Marking.37Paddle Blank and Spacer Identification.38Testing.3Figure1Line Blanks.2Tables1Dimensions of Class 150 Raised Face Figure-8 Blanks.42Dimensions of Class 300 Raised Face Figure-8 Blanks.53Dimensions of Class 600 Raised Face Figure-8 Blanks.64Dimensions of Class 900 Raised Face Figure-8 Blanks.75Dimensions of Class 1500 Raised Face Figure-8 Blanks.86Dimensions of Class 2500 Raised Face Figure-8 Blanks.97Dimensions of Class 150 Female Ring-Joint Facing Figure-8 Blanks.108Dimensions of Class 300 Female Ring-Joint Facing Figure-8 Blanks.119Dimensions of Class 600 Female Ring-Joint Facing Figure-8 Blanks.1210Dimensions of Class 900 Female Ring-Joint Facing Figure-8 Blanks.1311Dimensions of Class 1500 Female Ring-Joint Facing Figure-8 Blanks.1412Dimensions of Class 2500 Female Ring-Joint Facing Figure-8 Blanks.1513Dimensions of Class 150 Male Oval Ring-Joint Facing Figure-8 Blanks.1614Dimensions of Class 300 Male Oval Ring-Joint Facing Figure-8 Blanks.1715Dimensions of Class 600 Male Oval Ring-Joint Facing Figure-8 Blanks.1816Dimensions of Class 900 Male Oval Ring-Joint Facing Figure-8 Blanks.1917Dimensions of Class 1500 Male Oval Ring-Joint Facing Figure-8 Blanks.2018Dimensions of Class 2500 Male Oval Ring-Joint Facing Figure-8 Blanks.21Nonmandatory AppendicesADimensional Data for Line Blanks in U.S.Customary Units.22BReferences.41CQuality System Program.42iiiCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-FOREWORDIn July 1993,the ASME B16 Committee gave to its Subcommittee C the assignment to convertthe API 590 Steel Line Blanks Standard into an ASME standard.The American Petroleum Instituteno longer publishes the API 590 Standard.These line blanks were designed in accordance with the rules of the ASME B31.3-2002 edition.Materials and relevant footnotes have been added following the ASME format.Significant additions made to this 2005 edition include reference to the use of all materialslisted in B16.5 Table 1-A plus Metric units.The added materials of construction include additionsto classes of alloy steels,stainless steels,and nickel alloys.This edition has also been metricatedover previous editions to include both U.S.Customary units(in parenthesis)and Metric units inthe text,Metric units in dimensional tables in the body,and U.S.Customary units in dimensionaltables in Nonmandatory Annex A.All requests for interpretations or suggestions for revisions should be sent to the Secretary,B16 Committee,The American Society of Mechanical Engineers,Three Park Avenue,New York,NY 10016-5990.The B16 Committee operates under procedures accredited by the American National StandardsInstitute(ANSI).Following approval by the Standards Committee and ASME,this revision tothe 1997 edition was approved as an American National Standard by ANSI on September 19,2005 with the designation ASME B16.48-2005.ivCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16 COMMITTEEStandardization of Valves,Flanges,Fittings,and Gaskets(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSW.N.McLean,ChairR.A.Schmidt,Vice ChairC.Artibee,SecretaryCOMMITTEE PERSONNELR.W.Barnes,Anric Enterprises,Inc.W.B.Bedesem,ExxonMobil Research and Engineering Co.M.A.Clark,Nibco,Inc.C.E.Floren,Mueller Co.D.R.Frikken,Becht Engineering Co.G.G.Grills,U.S.Coast GuardA.Hamilton,ABS AmericasM.L.Henderson,Forgital USAG.A.Jolly,Vogt Valves/FlowserveM.Katcher,Haynes InternationalR.Koester,Honorary MemberSUBCOMMITTEE CD.R.Frikken,Chair,Becht Engineering Co.C.Artibee,Secretary,The American Society of MechanicalEngineersV.C.Bhasin,SigmatechG.D.Conlee,ConsultantW.C.Farrell,Jr.,ConsultantM.L.Henderson,Coffer Corp.R.E.Johnson,Flowline DivisionvW.N.McLean,Newco ValvesT.A.McMahon,Fisher Controls International,Inc.M.L.Nayyar,Bechtel Power Corp.J.D.Page,U.S.Regulatory CommissionP.A.Reddington,The American Society of Mechanical EngineersR.A.Schmidt,Trinity-ladishH.R.Sonderegger,Anvil International,Inc.W.M.Stephan,Flexitallic LPT.F.Stroud,Ductile Iron Pipe Research AssociationR.E.White,Richard E.White&Associates PCD.A.Williams,Southern Company ServicesR.Koester,Honorary MemberW.N.McLean,Newco ValvesM.L.Nayyar,Bechtel Power Corp.R.A.Schmidt,Trinity-ladishD.L.Shira,Taylor ForgeJ.C.Thompson,Milwaukee ValveL.A.Willis,Dow Chemical Co.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-viCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16.48-2005LINE BLANKS1SCOPE1.1 GeneralThis Standard covers pressure-temperature ratings,materials,dimensions,tolerances,marking,and testingfor operating line blanks in sizes NPS12through NPS 24for installation between ASME B16.5 flanges in the 150,300,600,900,1500,and 2500 pressure classes.1.2 Definitions1.2.1 Figure-8 Blank.A figure-8 blank(also called aspectacle blank)is a pressure-retaining plate with onesolid end and one open end connected with a web ortie bar(see Fig.1).1.2.2 Paddle Blank.A paddle blank is similar to thesolid end of a figure-8 blank.It has a plain radial handle.It is generally used in conjunction with a paddle spacerin large sizes.1.2.3 Paddle Spacer.A paddle spacer is similar tothe open end of a figure-8 blank.It has a plain radialhandle.It is generally used in conjunction with a paddleblank.1.3 ReferencesCodes,standards,and specifications,containing pro-visions to the extent referenced herein,constituterequirements of this Standard.These reference docu-ments are listed in Nonmandatory Appendix B.1.4 Quality SystemsNonmandatory requirements relating to the productmanufacturers Quality System Program are describedin Nonmandatory Appendix C.1.5 Relevant UnitsThis Standard states values in both Metric andU.S.Customary units.These systems of units are to beregarded separately as standard.Within the text,theU.S.Customary units are shown in parenthesis or sepa-rate tables.Refer to Nonmandatory Appendix A.Thevalues stated in each system are not exact equivalents;therefore,it is required that each system of units be usedindependently of the other.Combining values from thetwo systems constitutes nonconformance with the Stan-dard.Nonmandatory Appendix A provides dimensionsin U.S.Customary units.1.6 ConventionFor the purpose of determining conformance withthis Standard,the convention for fixingsignificant digits1where limits and maximum and minimum values arespecified,shall be rounded as defined in ASTMPractice E 29.This requires that an observed or calcu-lated value shall be rounded off to the nearest unit inthe last right-hand digit used for expressing the limit.Decimal values and tolerances do not imply a particularmethod of measurement.1.7 SizeNPS,followed by a dimensionless number,is the des-ignation for nominal blank size.NPS is related to thereference nominal diameter,DN,as defined in ISO 6708.The relationship is typically as follows:NPSDN121534201251143211240250212653804100NOTE:For NPS 4,the related DN is DN p 25(NPS).1.8 Service ConditionsCriteria for selection of materials suitable for particu-larfluidservicearenotwihtinthescopeofthisStandard.2PRESSURE-TEMPERATURE RATINGS2.1 Pressure ClassesLine blanks covered by this Standard are for the fol-lowing pressure classes:150,300,600,900,1500,and2500 as listed in ASME B16.5.2.2 Pressure-Temperature Ratings2.2.1 Ratings.Ratings are the maximum allowableworking gage pressure at the temperature shown inTables 2 and F-2 of ASME B16.5 for the appropriatematerial and pressure class.For intermediate tempera-tures,linear interpolation between temperatures withina pressure class is permitted by ASME B16.5.2.2.2 System Pressure Testing.Line blanks may besubjected to system tests at a pressure not to exceed1.5 times the 38C(100F)rating rounded off to the nexthigher 1 bar(25 psi)increment.Testing at any higherpressure is the responsibility of the user,taking intoCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16.48-2005LINE BLANKSFigure-8 BlankPaddle BlankPaddle SpacerFig.1Line Blanksaccount the requirements of the applicable code orregulation.2.2.3 Mixed Material Joints.Should either the twoflanges orthe lineblank in aflanged lineblank assemblynot have the same pressure-temperature rating,the rat-ing of the assembled joint at any temperature shall betheloweroftheflangeorlineblankratingatthattemper-ature.3DESIGN3.1 HandleThehandleorweb(tiebar)maybeintegralorattachedto the line blank or spacer.The web and its attachmentshall be capable of supporting the weight of the blankor spacer in all orientations without permanent defor-mation to the web.3.2 Edge PreparationFinished surfaces shall be free of projections thatwould interfere with gasket seating.3.3 Facing3.3.1 Raised Face Joint Blanks.The gasket seatingsurface finish and dimensions for raised face line blanksshall be in accordance with ASME B16.5.A raised facemay be specified at the option of the purchaser.Theheight of the raised faces shall be in addition to the2thicknesses,t,listed in Tables 1 through 6(Tables A-1through A-6 in Nonmandatory Appendix A).3.3.2 Female Ring-Joint Blanks.Female ring-jointgrooves shall be shaped with the groove side wall sur-face finish not exceeding 1.6?m(63?in.)Ra roughness.The finish of the gasket contact faces shall be judged byvisual comparison with Ra standards(see ASME B46.1)and not by instruments having stylus tracers and elec-tronic amplification.3.3.3 Male Ring-Joint Blanks.The gasket shape(ring)for male ring-joint blanks shall not exceed 1.6?m(63?in.)Ra roughness.The finish of the gasket contactfaces shallbe judged byvisual comparison withRa stan-dards(see ASME B46.1)and not by instruments havingstylus tracers and electronic amplification.4DIMENSIONS4.1 GeneralDimensions shall be in accordance with Tables 1through 18(Tables A-1 through A-18 of NonmandatoryAppendix A).4.2 Tolerances4.2.1 Facing Tolerances.Tolerances for facings shallbe in accordance with ASME B16.5.4.2.2 Thickness Tolerances.Thickness tolerances areNPS 18 and smaller zero+3.0 mm(0.12 in.)NPS 20 and larger zero+4.8 mm(0.19 in.)4.3 Openings(a)For NPS12,NPS34,and NPS 1 blanks in all raisedface classes,the inside diameter is equal to standardweight welding neck flange bore.(b)For NPS 114and larger blanks in Classes 150 and300 raised face,the inside diameter is equal to the pipeoutside diameter.(c)For NPS 114and larger blanks in Classes 600 and900 raised face,the inside diameter is equal toSchedule 10S welding neck flange bore.(d)For Class 1500 raised face blanks,the inside diam-eter is equal to Schedule 40 welding neck flange bore.(e)ForClass2500raisedfaceblanks,theinsidediame-ter is equal to Schedule 40 through NPS 6,Schedule 60for NPS 8 and NPS 10,and Schedule 80 for NPS 12.(f)For all ring-joint blanks,the inside diameter isequal to the pipe outside diameter.(g)Dimensionsarebaseduponconcentricinstallationof spiral wound gaskets with inner rings as required byASME B16.20 and conform to the maximum permittedbore of ASME B16.5 welding neck flanges described inTable 16 of ASME B16.20.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-LINE BLANKSASME B16.48-20054.4 Facing FinishFacing finish shall be in accordance with ASME B16.5,para.6.4.5.5MATERIALSMaterials for line blanks shall be in accordance withASME B16.5,Table 1-A,and shall include materialrestrictions cited in notes to Tables 2 or F-2 ofASME B16.5.Recommended bolting materials forflange-blank assemblies are listed in ASME B16.5,Table 1-B.Criteria for the selection of materials are not withinthe scope of this Standard.6MARKING6.1 General(a)Line blanks shall be marked as follows:(1)Manufacturers name or trademark(2)Materia