1、ASME A112.14.1-2003(Revision of ANSI A112.14.1M-1975)BACKWATERVALVESAN AMERICAN NATIONAL STANDARDIntentionally left blank AN AMERICAN NATIONAL STANDARDBACKWATERVALVESASME A112.14.1-2003(Revision of ANSI A112.14.1M-1975)Date of Issuance: March 5, 2004The next edition of this Standard is scheduled for
2、 publication in 2008. 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 at http:/www.asme.org/codes/ as they are issued.
3、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
4、fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” o
5、r “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 forinf
6、ringement 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 r
7、epresentative(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 precl
8、udes 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 10016-5990Copyri
9、ght 2004 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommitteeRoster . vCorrespondenceWiththeA112Committee . vii1 General 12 Requirements 23 Testing 64 Marking . 6Figures1 CombinationFloorDrainandBackwaterValve . 32 FloorDrainWithAdjustableStr
10、ainerandBackwaterValve . 33 FloorDrainWithTractorGrateandBackwaterValve . 34 NormallyOpenBackwaterValve. 35 NonmetallicVerticalBackwaterValve 36 NonmetallicBackwaterValveWithAccessSleeve 47 NonmetallicHorizontalBackwaterValve . 4Tables1 DimensionsforHorizontalBackwaterValves . 22 DimensionsforCombin
11、ationHorizontalBackwaterValveandManualGateValves . 43 DimensionsforTerminalBackwaterValves. 5iiiFOREWORDTheAmericanNationalStandardsCommitteeA112,PlumbingMaterialsandEquipment,wasestablishedonJuly27,1955.ItsfirstorganizationalmeetingwasheldonJuly22,1958,andPanelNo. 14 was created on May 1, 1964, to
12、establish standards for interceptors, separators, andbackwatervalves.Itscharterwasasfollows:therecommendationofsuitableexistingstandardsincooperationwithinterestedsponsors,orthedevelopmentofadequatenewstandardsasneededforinterceptors,separators,andbackwatervalvesasusedorinstalledinplumbingsystems.Th
13、e A112 Committee underwent a number of organizational changes over the years and iscurrentlyidentifiedasASMEStandardsCommitteeA112.ItsPanel14workinggroup,withtheresponsibilityforbackwatervalves,wasredesignatedProjectTeam14.1.TheProjectTeammettwicetopreparethisrevision,whichnowincludescriteriafromthe
14、InternationalAssociationofPlumbingandMechanicalOfficials(IAPMO)ProductStandard38.SuggestionsfortheimprovementofthisStandardarewelcome.TheyshouldbesenttoTheAmericanSocietyofMechanicalEngineers;Attn:Secretary,A112MainCommittee;ThreeParkAvenue;NewYork,NY10016-5990.ThisrevisionwasapprovedbytheA112MainCo
15、mmitteeandbytheASMEBoardonStandard-ization.ItwasapprovedasanAmericanNationalStandardonDecember31,2003.ivASME A112 STANDARDS COMMITTEEStandardization of PlumbingMaterials and Equipment(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSD. W. Viola, ChairS.
16、A. Remedios, Vice ChairC. J. Gomez, SecretaryCOMMITTEE PERSONNELR. H. Ackroyd, Rand EngineeringJ. A. Ballanco, JB Engineering and Code ConsultingJ. Bouwer, Sanitary for All, Ltd.M. N. Burgess, Burgess Group, Inc.S. L. Cavanaugh, United AssociationA. Ciechanowski, NSF InternationalJ. R. Paschal, Alte
17、rnate, NSF InternationalA. Cohen, A. Cohen and AssociatesP. V. DeMarco, American Standard, Inc.N. Covino, Alternate, American Standard, Inc.G. S. Duren, Code Compliance, Inc.R. Emmerson, The Chicago Faucet Co.F. C. Evans, Alternate, The Chicago Faucet Co.L. S. Galowin, National Institute of Standard
18、s and TechnologyC. J. Gomez, The American Society of Mechanical EngineersR. I. Greenwald, Sunroc Corp.E. Ho, IAMO Research and Testing, Inc.D. E. Holloway, SGS US Testing Co.M. Klimboff, ConsultantM. T. Kobel, IAPMON. M. Kummerlen, Moen, Inc.L. A. Mercer, Alternate, Moen, Inc.J. W. Lauer, Sloan Valv
19、e Co.R. M. Martin, California Energy CommissionP. W. Meikle, P. W. Meikle ConsultingS. Rawalpindiwala, Kohler Co.J. A. Sargent, Alternate, Kohler Co.S. A. Remedios, Delta Faucet Co.G. L. Simmons, Charlotte Pipe and FoundryL. M. Simnick, BOCA InternationalW. M. Smith, Jay R. Smith Industries, Inc.D.
20、W. Viola, Plumbing Manufacturers InstituteR. E. White, Richard E. White and AssociatesW. C. Whitehead, Plumbing and Drainage InstitutevA112 PROJECT TEAM 14.1 METALLIC AND NONMETALLICBACKWATER VALVESW. M. Smith, Project Team Leader, Jay R. Smith Industries, Inc.C. R. Graham, Deputy Project Team Leade
21、r, Martech EnterprisesW. C. Whitehead, Project Team Secretary, Plumbing and Drainage InstituteR. H. Ackroyd, Rand EngineeringJ. A. Ballanco, JB Engineering and Code ConsultingR. C. Guinn, Canplas Industries, Ltd.M. T. Kobel, IAPMOJ. W. Lauer, Sloan Valve Co.R. B. Martin, W/C Technology Corp.S. J. Mc
22、Danal, Jay R. Smith Manufacturing Co.J. L. Neumann, Eljer PlumbingwareD. W. Viola, Plumbing Manufacturers InstituteF. R. Volgstadt, Volgstadt and Associates, Inc.R. E. White, Richard E. White and AssociatesviCORRESPONDENCE WITH THE A112 COMMITTEEGeneral. ASMEStandardsaredevelopedandmaintainedwiththe
23、intenttorepresenttheconsensus of concerned interests. As such, users of this Standard may interact with theCommittee by requesting interpretations, proposing revisions, and attending Committeemeetings.Correspondenceshouldbeaddressedto:Secretary,A112StandardsCommitteeTheAmericanSocietyofMechanicalEng
24、ineersThreeParkAvenueNewYork,NY10016-5990Proposing Revisions. RevisionsaremadeperiodicallytotheStandardtoincorporatechangesthatappearnecessaryordesirable,asdemonstratedbytheexperiencegainedfromtheapplicationoftheStandard.Approvedrevisionswillbepublishedperiodically.TheCommitteewelcomesproposalsforre
25、visionstothisStandard.Suchproposalsshouldbeasspecificaspossible,citingtheedition,theparagraphnumber(s),theproposedwording,andadetaileddescriptionofthereasonsfortheproposal,includinganypertinentdocumen-tation.Whenappropriate,proposalsshouldbesubmittedusingtheA112ProjectInitiationRequestForm.Interpret
26、ations. Uponrequest,theA112CommitteewillrenderaninterpretationofanyrequirementoftheStandard.InterpretationscanonlyberenderedinresponsetoawrittenrequestsenttotheSecretaryoftheA112StandardsCommittee.The request for interpretation should be clear and unambiguous. It is further recom-mendedthattheinquir
27、ersubmithis/herrequestinthefollowingformat:Subject: Citetheapplicableparagraphnumber(s)andthetopicoftheinquiry.Edition: CitetheapplicableeditionoftheStandardforwhichtheinterpretationisbeingrequested.Question: Phrase the question as a request for an interpretation of a specificrequirementsuitableforg
28、eneralunderstandinganduse,notasarequestforanapprovalofaproprietarydesignorsituation.Theinquirermayalso include any plans or drawings that are necessary to explain thequestion;however,theyshouldnotcontainproprietarynamesorinfor-mation.Requests that are not in this format will berewritten in this form
29、at by the Committeepriortobeinganswered,whichmayinadvertentlychangetheintentoftheoriginalrequest.ASMEproceduresprovideforreconsiderationofanyinterpretationwhenorifadditionalinformationthatmightaffectaninterpretationisavailable.Further,personsaggrievedbyaninterpretationmayappealtothecognizantASMEComm
30、itteeorSubcommittee.ASMEdoes not “approve,”“certify,”“rate,” or “endorse” any item, construction, proprietarydevice,oractivity.Attending Committee Meetings. The A112 Standards Committee schedules meetings asneeded,whichareopentothepublic.PersonswishingtoattendanymeetingshouldcontacttheSecretaryofthe
31、A112StandardsCommittee.TheA112homepagecontainsinformationonfuturemeetingdatesandlocations.viiIntentionally left blank ASME A112.14.1-2003BACKWATER VALVES1 GENERAL1.1 ScopeThisStandardestablishesrequirementsfordimen-sions,performancerequirements,connections,materialsandfinishes,testing,andmarkingofba
32、ckwatervalves.TypesofbackwatervalvescoveredinthisStandardin-clude horizontal backwater valves, combination hori-zontalbackwatervalvesandmanualgatevalves,termi-nalbackwatervalves,combinationfloordrainswithbackwater valves, vertical or 90 deg backwater valve,andrelatedproducts.1.2 Units of Measurement
33、Values are stated in U.S. Customary units and theInternationalSystemofUnits(SI).TheU.S.Customaryunitsshallbeconsideredasthestandard.1.3 IllustrationsThe figures included in this Standard are intendedonlytodescribeandportraytypicaltypesofbackwatervalvesandarenotintendedtorestrictdesignnortobeusedfors
34、pecificationpurposes.1.4 Reference StandardsThefollowingstandardsarereferencedinthisdocu-ment(unlessotherwisespecified,thelatesteditionshallapply):ASMEB1.20.1,PipeThreads(ExcludingDryseal)ASMEB16.1,CastIronPipeFlangesandFlangedFittingsPublisher: The American Society of Mechanical Engi-neers(ASMEInte
35、rnational),ThreeParkAvenue,NewYork,NY10016-5990;OrderDepartment:22LawDrive,Box2300,Fairfield,NJ07007-2300ASTMA48,GreyIronCastingsASTMA74,CastIronSoilPipeandFittingsASTM A 307, Carbon Steel Externally Threaded Fas-tenersASTMA351,Austenitic SteelCastingsforHigh-Tem-peratureServiceASTMA888,HublessCastI
36、ronSoilPipeandFittingsforSanitaryandStormDrain,WasteandVentPipingApplicationsASTMB16,FreeCuttingBrassRod,BarandShapesforUseinScrewMachinesASTMB584,CopperAlloySandCastingsforGeneralApplications1ASTM C 564, Rubber Gaskets for Cast Iron Soil PipeandFittingsASTMC1440,StandardSpecificationforThermoplasti
37、cElastomeric(TPE)GasketMaterialsforDrain,Waste,andVent(DWV),Sewer,SanitaryandStormPlumb-ingSystemsASTMD1784,RigidPoly(VinylChloride)(PVC)Com-poundsandChlorinatedPoly(VinylChloride)(CPVC)CompoundsASTM D 2661, Acrylonitrile-Butadiene-Styrene (ABS)Schedule40PlasticDrain,Waste,andVentPipeandFittingsASTM
38、D2665,Poly(VinylChloride)(PVC)PlasticDrain,WasteandVentPipeandFittingsASTMD3965,RigidAcrylonitrile-Butadiene-Styrene(ABS)CompoundsforPipeandFittingsPublisher:TheAmericanSocietyforTestingandMateri-als (ASTM), 100 Barr Harbor Drive, West Consho-hocken,PA19428CSAB181.1,ABSDrainWasteandVentPipeandPipeFi
39、ttingsCSAB181.2,PVCDrainWasteandVentPipeandPipeFittingsCSA B 182.1, PVC Plastic Drain and Sewer Pipe andPipeFittingsCSAB602,MechanicalCouplingsforDrain,Waste,andVentPipeandSewerPipePublisher:CanadianStandardsAssociation,5060Spec-trumWay,Suite100,Mississauga,Ontario,L4W5N6,Canada1.5 Definitionsbackwa
40、tervalve:adeviceinstalledinbuildingdrainagesystems utilizing a check valve to prevent backflow.Backwatervalvesaredesignedineithernormallyopenpositionornormallyclosedposition.normally open backwater valve: a backwater valve de-signed in such a manner as not to interfere with themovementoftheairinthed
41、rainagesystem.Whenin-stalled,theswingcheckhangsinanormallyopenpo-sition.normallyclosedbackwatervalve:abackwatervalvede-signedinsuchamannerthatwheninstalled,theswingcheckremainscloseduntilflowcausesittoopen.blowhole:holeincastingduetoairorgasinthemetalormold.ASME A112.14.1-2003 BACKWATER VALVEScold s
42、hut: castingdefects formed when twostreams ofmetalbecomesocoldthattheydonotfuseuponmeet-ing,creatinganincompletecasting.fin:projectiononcastingsduetoimperfectjoints.flashing:aflashingistoaplasticinjectedmoldedbackwa-tervalvebodyasafinistoacastironproduct.invert to the outlet: the lowest portion of t
43、he inside ofanyhorizontalshape.Inthiscase,thelowestportionoftheinsideoftheoutlet.pickle:thechemicalorelectrochemicalremovalofsurfaceoxidessuchasmillscale,and/oroxidesformedduringstorage,andwelddiscolorations.1.6 Types of Backwater Valves1.6.1 HorizontalBackwaterValve. Abackwatervalvedesignedtobeinst
44、alledinahorizontaldrainlineincor-poratinganinternalcheckmembertopreventbackflow.(SeethefigureassociatedwithTable1.)1.6.2 Combination Horizontal Backwater Valve andManual Gate Valve. A backwater valve designed tobeinstalledinahorizontaldrainlineincorporatinganinternalcheckmemberandmanualgatevalvetopr
45、eventbackflow.(SeethefigureassociatedwithTable2.)1.6.3 Terminal Backwater Valve. Abackwatervalvedesignedtobeinstalledatthedischargeendofahori-zontaldrainlineincorporatingacheckmembertopre-ventbackflow.(SeethefigureassociatedwithTable3.)1.6.4 Combination Floor Drain and Backwater Valve.Afloor drainin
46、corporating aninternal checkmembertopreventbackflow.(SeeFigs.1,2,and3.)1.6.5 Normally Open Backwater Valve. Abackwatervalvedesignedinsuchamannerasnottointerferewiththe movement of the air in the drainage system. SeeFig.4.1.6.6 Verticalor90-DegBackwaterValve. Abackwa-tervalvedesignedtobeinstalledinve
47、rticalpiping,suchas downstream from a P-trap or a holding tank. SeeFigs.5,6,and7.2 REQUIREMENTS2.1 Dimensions2.1.1 The backwater valve shall comply with theminimumdimensionalrequirementsindicatedinTables1through3.2.1.2 Hubandspigotdimensionsshallcomplywiththeappropriatehubandspigotrequirementsofthej
48、oin-ingmaterials.2.2 Performance Requirements2.2.1 Normally Closed Backwater Valve. Backwatervalvesdesignedtobenormallyclosedshallbesocon-structed such that when the valve is installed at the2AABCheck member(a) Hub and Spigot TypeBoltedgasketedcoverAABCheck memberBoltedgasketedcover(b) Flanged TypeT
49、able 1 Dimensions for HorizontalBackwater ValvesB, in. (mm)Nominal Size, in. A, in. (mm) Opening2 2 (51) 3 (76)3 3 (76) 5 (127)4 4 (102) 6 (152)5 5 (127) 7 (178)6 6 (152) 8 (203)8 8 (203) 10 (254)required1:48slope(14in.perfoot)withrespecttothedirectionofflow,thecheckmemberwillbeinaclosedpositionwhennosewageisdischarged.Thevalvewillremainsufficientlyopenduringperiodsoflowflowstoavoidthescreeningofsolids.2.2.2 Normally Open Backwater Valve. Backwatervalves designed to be normally open shall be so con-structed such that when the valve is installed at therequired1:48slope(14in.perfoot)with
