ASME_B16.12-2019.pdf

AN AM E R IC AN NAT IO NAL STANDARD ASME B16.12-2019Revision of ASME B16.12-2009(R2014)Cast Iron Threaded Drainage FittingsASME B16.12-2019Revision of ASME B16.12-2009(R2014)Cast Iron ThreadedDrainage FittingsAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USAxDate of Issuance:November 18,2019The next edition of this Standard is scheduled for publication in 2024.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard.Periodically certainactionsoftheASMEB16CommitteemaybepublishedasCases.CasesandinterpretationsarepublishedontheASMEwebsiteunder the Committee Pages at http:/cstools.asme.org/as they are issued.Errata to codes and standards may be posted on the ASME website under the Committee Pages to provide corrections toincorrectlypublisheditems,ortocorrecttypographicalorgrammaticalerrorsincodesandstandards.Sucherratashallbeusedon the date posted.TheCommitteePagescanbefoundathttp:/cstools.asme.org/.Thereisanoptionavailabletoautomaticallyreceiveane-mailnotification when errata are posted to a particular code or standard.This option can be found on the appropriate CommitteePage after selecting“Errata”in the“Publication Information”section.ASME is the registered trademark of The American Society of Mechanical Engineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunityto participate.The proposed codeorstandardwasmadeavailable forpublic reviewandcommentthatprovidesanopportunityfor additional public input 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 any items mentioned in thisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtherisk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as government or industryendorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME proceduresand 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 EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2019 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.vCommittee Roster.viiCorrespondence With the B16 Committee.viiiSummary of Changes.xList of Changes in Record Number Order.xi1Scope and General.12Size.13Marking.14Materials.15Dimensions and Tolerances.16Threading.27Ribs.38Coatings.39Face Bevel.3Mandatory AppendixIReferences.14Nonmandatory AppendicesAQuality System Program.15BDimensions of Welded and Seamless Steel Pipe(ASME B36.10M).16Figures2.1-1Identification of Reducing Fittings.26-1Types of Fittings Tapped to Provide 21 mm/m(0.25 in./ft)Pitch.13Tables2.1-1Inspection Limits for Diameter and Width of Band.22.1-2Inspection Limits for Center-to-End Dimensions.24.1-1Wall Thickness and Threaded End Dimensions.44.1-2Center-to-End Dimensions of Elbows.54.1-3Dimensions of Tees,Crosses,and Y-Branches.64.1-4Dimensions of Y-Branches(Reducing Sizes).74.1-5Dimensions of 45-deg Y-Branches.84.1-6Dimensions of 45-deg Y-Branches(Reducing Sizes).94.1-7Dimensions of Couplings.104.1-8Dimensions of Increasers.104.1-9Dimensions of Offsets.10iii4.1-10Dimensions of Tucker Connections,Roof Connections,and Tucker Y-Branches.114.1-11Dimensions of P-Traps,Bath P-Traps,and Running Traps.12B-1Dimensions of Welded and Seamless Steel Pipe.16ivFOREWORDScrew joint drainage fittings were developed in about 1880 by the Durham House Drainage Co.of New York and areoftenreferredtoasDurhamfittings.Atthattime,soilpipesanddrainsinNewYorkhadbeenrequiredtobeofplumberscast iron soil pipe,whereas Chicagos soil pipes were required to be of lead or plumbers cast iron pipe.To form a continuous passageway with no pockets or obstructions where foreign matter could collect and graduallyaccumulate,itwasnecessarytodesignaspecialtypeofscrewfitting.Insidediametersofthefittingsareaboutthenominalsizeofstandardweightwroughtsteelpipe(Schedule40).Thethreadchamberisdesignedsothatwhenthepipeistightlyscrewedintothefitting,itsendnearlyabutstheshoulderofthefitting,therebymakingapracticallycontinuouspassage.Thethreadingofthesefittingsrequiredspecialca