16-3_Edtn_2006.pdf

AN AMERICAN NATIO NAL STANDARDMalleable Iron ThreadedFittingsClasses 150 and 300ASME B16.3-2006(Revision of ASME B16.3-1998)Copyright 2007 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME B16.3-2006(Revision of ASME B16.3-1998)Malleable IronThreadedFittingsClasses 150 and 300AN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyright 2007 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:April 30,2007The next edition of this Standard is scheduled for publication in 2011.There will be no addendaissued 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,and will be published within the next edition of thestandard.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 issued in accordance with governing ASME procedures andpolicies which precludes the issuance of interpretations by individual volunteers.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 2007 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright 2007 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B16 Committee.vi1Scope.12PressureTemperature Ratings.13Size.24Marking.25Material.26Dimensions and Tolerances.27Threading.38Ribs.39Plugs,Bushings,and Locknuts.310Face Bevel.311Coatings.3Figures1Identification of Reducing Fittings.22Gaging of Chamfered Internal Threads.3Tables1PressureTemperature Ratings.42Inspection Tolerances.43Dimensions of Class 150,90-deg Elbows,Tees,and Crosses,and 45-deg Elbows(Straight Sizes).54Dimensions of Class 150,90-deg Elbows and Crosses(Reducing Sizes).65Dimensions of Class 150 Tees(Reducing Sizes).76Dimensions of Class 150,45-deg Y-Branches(Straight Sizes).87Dimensions of Class 150 Street Tees and 90-deg and 45-deg Street Elbows.98Dimensions of Class 150 Couplings(Straight and Reducing Sizes).109Dimensions of Class 150 Caps.1110Dimensions of Class 150,Closed-,Medium-,and Open-Pattern Return Bends.1211Dimensions of Class 300,90-deg Elbows,Tees,and Crosses,and 45-deg Elbows(Straight Sizes).1312Center-to-End Dimensions of Class 300,90-deg Elbows(Reducing Sizes).1313Center-to-End Dimensions of Class 300 Tees(Reducing Sizes).1414Dimensions of Class 300 Couplings.1515Dimensions of Class 300 Reducing Couplings.1616Dimensions of Class 300 Caps.1717Dimensions of Class 300,90-deg and 45-deg Street Elbows.1818Dimensions of Class 300 Return Bends.18Mandatory Appe