ASME_B16-1-2010.pdf

Gray Iron Pipe Flanges and Flanged FittingsClasses 25,125,and 250AN AMERICAN NATIO NAL STANDARDASME B16.1-2010(Revision of ASME B16.1-2005)Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-/:#:$#:*:$*:*:*:#*:$:$:*INTENTIONALLY LEFT BLANKCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-/:#:$#:*:$*:*:*:#*:$:$:*ASME B16.1-2010(Revision of ASME B16.1-2005)Gray Iron PipeFlanges andFlanged FittingsClasses 25,125,and 250AN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016 USACopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-/:#:$#:*:$*:*:*:#*:$:$:*Date of Issuance:January 7,2011The next edition of this Standard is scheduled for publication in 2015.This Standard will becomeeffective 6 months after the Date of Issuance.There will be no addenda issued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org as they are issued.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 assure 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 assumes 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 2011 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.viCorrespondence With the B16 Committee.viiSummary of Changes.viii1Scope.12General.13PressureTemperature Ratings.14Size.35Marking.36Materials.37Fitting Dimensions and Tolerances.38Bolt,Nut,and Gasket Dimensions.49Hydrostatic Tests.410Certifications.5Figures1Method of Designating Outlets of Reducing Fittings in Specifications.62Drain Connections.73Method of Designating Location of Tapped Holes for Drains When Specified.8Tables1PressureTemperature Ratings.92Class 250 Flange and Bolting Dimensions.103Dimensions of Class 25 Gray Iron Flanged Fittings.124Dimensions of Class 125 Gray Iron Flanged Fittings.145Dimensions of Class 250 Gray Iron Flanged Fittings.196Dimensions of Anchorage Bases for Straight and Reducing Class 125 Tees.247Dimensions of Anchorage Bases for Straight and Reducing Class 250 Tees.268Class 25 Flange and Bolting Dimensions.289Class 125 Flange and Bolting Dimensions.2910Minimum Thread Length.30Mandatory AppendicesIDimensions of Fittings in U.S.Customary Units.31IIReferences.58Nonmandatory AppendixAQuality System Program.59iiiCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-/:#:$#:*:$*:*:*:#*:$:$:*FOREWORDIn 1894,the American Society of Mechanical Engineers(ASME)adopted a standard flangetemplate(“ASME Standard”)for low-pressure service.A“Manufacturers Standard”for pressuresup to 250 psi followed in 1901.Around 1910,a group of fittings manufacturers formed anorganization that was the forerunner of the present Manufacturers Standardization Society of theV