NFPA22-2018

NFPA22StandardforWaterTanksforPrivateFireProtection2018CustomerID12242767IMPORTANTNOTICESANDDISCLAIMERSCONCERNINGNFPASTANDARDSNFPAcodes,standards,recommendedpractices,andguides(“NFPAStandards”),ofwhichthedocumentNOTICEANDDISCLAIMEROFLIABILITYCONCERNINGTHEUSEOFNFPASTANDARDScontainedhereinisone,aredevelopedthroughaconsensusstandardsdevelopmentprocessapprovedbytheAmericanNationalStandardsInstitute.Thisprocessbringstogethervolunteersrepresentingvariedviewpointsandintereststoachieveconsensusonreandothersafetyissues.WhiletheNFPAadministerstheprocessandestablishesrulestopromotefairnessinthedevelopmentofconsensus,itdoesnotindependentlytest,evaluate,orverifytheaccuracyofanyinformationorthesoundnessofanyjudgmentscontainedinNFPAStandards.TheNFPAdisclaimsliabilityforanypersonalinjury,property,orotherdamagesofanynaturewhatsoever,whetherspecial,indirect,consequentialorcompensatory,directlyorindirectlyresultingfromthepublication,useof,orrelianceonNFPAStandards.TheNFPAalsomakesnoguarantyorwarrantyastotheaccuracyorcompletenessofanyinformationpublishedherein.InissuingandmakingNFPAStandardsavailable,theNFPAisnotundertakingtorenderprofessionalorotherservicesfororonbehalfofanypersonorentity.NoristheNFPAundertakingtoperformanydutyowedbyanypersonorentitytosomeoneelse.Anyoneusingthisdocumentshouldrelyonhisorherownindependentjudgmentor,asappropriate,seektheadviceofacompetentprofessionalindeterminingtheexerciseofreasonablecareinanygivencircumstances.TheNFPAhasnopower,nordoesitundertake,topoliceorenforcecompliancewiththecontentsofNFPAStandards.NordoestheNFPAlist,certify,test,orinspectproducts,designs,orinstallationsforcompliancewiththisdocument.AnycerticationorotherstatementofcompliancewiththerequirementsofthisdocumentshallnotbeattributabletotheNFPAandissolelytheresponsibilityofthecertierormakerofthestatement.REVISIONSYMBOLSIDENTIFYINGCHANGESFROMTHEPREVIOUSEDITIONTextrevisionsareshaded.Abeforeasectionnumberindicatesthatwordswithinthatsectionweredeletedandatotheleftofatableorgurenumberindicatesarevisiontoanexistingtableorgure.Whenachapterwasheavilyrevised,theentirechapterismarkedthroughoutwiththesymbol.Whereoneormoresectionsweredeleted,aisplacedbetweentheremainingsections.Chapters,annexes,sections,gures,andtablesthatarenewareindicatedwithanN.Notethattheseindicatorsareaguide.Rearrangementofsectionsmaynotbecapturedinthemarkup,butuserscanviewcompleterevisiondetailsintheFirstandSecondDraftR/docinfo.AnysubsequentchangesfromtheNFPATechnicalMeeting,TentativeInterimAmendments,andErrataarealsolocatedthere.REMINDER:UPDATINGOFNFPASTANDARDSUsersofNFPAcodes,standards,recommendedpractices,andguides(“NFPAStandards”)shouldbeawarethatNFPAStandardsmaybeamendedfromtimetotimethroughtheissuanceofaTentativeInterimAmendment(TIA)orcorrectedbyErrata.AnofcialNFPAStandardatanypointintimeconsistsofthecurrenteditionofthedocumenttogetherwithanyTIAsandErratathenineffect.TodeterminewhetheranNFPAStandardhasbeenamendedthroughtheissuanceofTentativeInterimAmendmentsorcorrectedbyErrata,/docinfotochoosefromthelistofNFPAStandardsorusethesearchfeaturetoselecttheNFPAStandardnumber(e.g.,NFPA13).Thedocumentinformationpageprovidesup-to-datedocument-specicinformationaswellaspostingsofallexistingTIAsandErrata.Italsoincludestheoptiontoregisterforan“Alert”featuretoreceiveanautomaticemailnoticationwhennewupdatesandotherinformationarepostedregardingthedocument.ISBN:978-145591887-4(PDF)ISBN:978-145591888-1(eBook)IMPORTANTNOTICESANDDISCLAIMERSCONCERNINGNFPASTANDARDSADDITIONALNOTICESANDDISCLAIMERSUpdatingofNFPAStandardsUsersofNFPAcodes,standards,recommendedpractices,andguides(“NFPAStandards”)shouldbeawarethatthesedocumentsmaybesupersededatanytimebytheissuanceofneweditionsormaybeamendedfromtimetotimethroughtheissuanceofTentativeInterimAmendmentsorcorrectedbyErrata.AnofcialNFPAStandardatanypointintimeconsistsofthecurrenteditionofthedocumenttogetherwithanyTentativeInterimAmendmentsandanyErratathenineffect.InordertodeterminewhetheragivendocumentisthecurrenteditionandwhetherithasbeenamendedthroughtheissuanceofTentativeInterimAmendmentsorcorrectedthroughtheissuanceofErrata,consultappropriateNFPApublicationssuchastheNationalFireCodesSubscriptionService,visittheNFPA,orcontacttheNFPAattheaddresslistedbelow.InterpretationsofNFPAStandardsAstatement,writtenororal,thatisnotprocessedinaccordancewithSection6oftheRegulationsGoverningtheDevelopmentofNFPAStandardsshallnotbeconsideredtheofcialpositionofNFPAoranyofitsCommitteesandshallnotbeconsideredtobe,norberelieduponas,aFormalInterpretation.PatentsTheNFPAdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsreferencedin,relatedto,orassertedinconnectionwithanNFPAStandard.TheusersofNFPAStandardsbearthesoleresponsibilityfordeterminingthevalidityofanysuchpatentrights,aswellastheriskofinfringementofsuchrights,andtheNFPAdisclaimsliabilityfortheinfringementofanypatentresultingfromtheuseoforrelianceonNFPAStandards.NFPAadherestothepolicyoftheAmericanNationalStandardsInstitute(ANSI)regardingtheinclusionofpatentsinAmericanNationalStandards(“theANSIPatentPolicy”),andherebygivesthefollowingnoticepursuanttothatpolicy:NOTICE:TheusersattentioniscalledtothepossibilitythatcompliancewithanNFPAStandardmayrequireuseofaninventioncoveredbypatentrights.NFPAtakesnopositionastothevalidityofanysuchpatentrightsorastowhethersuchpatentrightsconstituteorincludeessentialpatentclaimsundertheANSIPatentPolicy.If,inconnectionwiththeANSIPatentPolicy,apatentholderhasledastatementofwillingnesstograntlicensesundertheserightsonreasonableandnondiscriminatorytermsandconditionstoapplicantsdesiringtoobtainsuchalicense,copiesofsuchledstatementscanbeobtained,onrequest,fromNFPA.Forfurtherinformation,contacttheNFPAattheaddresslistedbelow.LawandRegulationsUsersofNFPAStandardsshouldconsultapplicablefederal,state,andlocallawsandregulations.NFPAdoesnot,bythepublicationofitscodes,standards,recommendedpractices,andguides,intendtourgeactionthatisnotincompliancewithapplicablelaws,andthesedocumentsmaynotbeconstruedasdoingso.CopyrightsNFPAStandardsarecopyrighted.Theyaremadeavailableforawidevarietyofbothpublicandprivateuses.Theseincludebothuse,byreference,inlawsandregulations,anduseinprivateself-regulation,standardization,andthepromotionofsafepracticesandmethods.Bymakingthesedocumentsavailableforuseandadoptionbypublicauthoritiesandprivateusers,theNFPAdoesnotwaiveanyrightsincopyrighttothesedocuments.UseofNFPAStandardsforregulatorypurposesshouldbeaccomplishedthroughadoptionbyreference.Theterm“adoptionbyreference”meansthecitingoftitle,edition,andpublishinginformationonly.Anydeletions,additions,andchangesdesiredbytheadoptingauthorityshouldbenotedseparatelyintheadoptinginstrument.InordertoassistNFPAinfollowingtheusesmadeofitsdocuments,adoptingauthoritiesarerequestedtonotifytheNFPA(Attention:Secretary,StandardsCouncil)inwritingofsuchuse.FortechnicalassistanceandquestionsconcerningadoptionofNFPAStandards,contactNFPAattheaddressbelow.ForFurtherInformationAllquestionsorothercommunicationsrelatingtoNFPAStandardsandallrequestsforinformationonNFPAproceduresgoverningitscodesandstandardsdevelopmentprocess,includinginformationontheproceduresforrequestingFormalInterpretations,forproposingTentativeInterimAmendments,andforproposingrevisionstoNFPAstandardsduringregularrevisioncycles,shouldbesenttoNFPAheadquarters,addressedtotheattentionoftheSecretary,StandardsCouncil,NFPA,1BatterymarchPark,P.O.Box9101,Quincy,MA02269-9101;email:stds_.FormoreinformationaboutNFPA,visittheNFPA.AllNFPA/docinfo.22-1Copyright2017NationalFireProtectionAssociation.AllRightsReserved.NFPA22StandardforWaterTanksforPrivateFireProtection2018EditionThiseditionofNFPA22,StandardforWaterTanksforPrivateFireProtection,waspreparedbytheTechnicalCommitteeonWaterTanks.ItwasissuedbytheStandardsCouncilonNovember10,2017,withaneffectivedateofNovember30,2017,andsupersedesallpreviouseditions.ThiseditionofNFPA22wasapprovedasanAmericanNationalStandardonNovember30,2017.OriginandDevelopmentofNFPA22In1909,theNFPACommitteeonGravityTanksdevelopedtheStandardonGravityTanks.Amendmentswereconsideredin1912and1913,andthestandardwasadoptedin1914.Revisedoramendededitionswereadoptedin1915,1917,1918,1919,1922,1926,1928,1930,1931,1933,1936,1941,1949,and1950.ThenameofthecommitteewaschangedtotheCommitteeonWaterTanks,anditsrecommendationsresultedinchangesadoptedin1957,1958,1962,1965,1967,1970,1971,1974,1976,1978,1981,and1987.Tanksotherthangravitytanks(which,atthattime,includedconcretereservoirs)andvalvepitswererstcoveredin1913,pressuretanks(formerlycoveredbyStandardsforSprinklerSystems)werecoveredin1915,andtankheatingwascoveredin1922.Thestandardtitlehasbeenperiodicallyamendedtoreecttheexpandedscopeofthestandard.The1993editionprovidednew,environmentallyfriendlyrequirementsfortank-coatingsystems.Twonewchapterswereincludedtocoverthedesignanderectionofboltedsteeltanksandconcretetanks.Informationonberglasstanksalsowasincluded.Thesechanges,alongwithothereditorialchanges,reectedthecurrentinformationforwaterstoragetankdesign.The1996editionofNFPA22consolidatedtankcareandmaintenanceinformationwithinasinglechapter.Furtherrevisionsaddressedthecorrosionresistanceofcertaintankcomponents,accessintotanks,themonitoringofinternalconditions,andthestructuralstressestowhichtanksaresubjected.TheguresinAppendixBwererevisedtoreectcurrentpractices.Editorialchangeswerealsomade.The1998editionfurtheraddressedenvironmentalissues.Allinspection,testing,andmaintenancerequirementswereremovedandaddedtotheappropriatechapterofthe1998editionofNFPA25,StandardfortheInspection,Testing,andMaintenanceofWater-BasedFireProtectionSystems.The2003editionwaschangedtoconformtotheManualofStyleforNFPATechnicalCommitteeDocuments,2000edition.Referencedpublicationswereupdated.The2008editionrecognizedtheuseofberglass-reinforcedplastic(FRP)tankswithanewChapter11.AcceptancetestrequirementswereconsolidatedintoanewChapter17,“AcceptanceTestRequirements,”toimproveuser-friendliness.The2013editionaddedsizingrequirementsforbreaktanksinChapter4andsizingproceduresforpressuretanksintheChapter7annexmaterial.Thetermsuctiontankwasdened,andtherequirementsforanti-vortexplateswererevised.Table5.4wasupdatedtoalignwithcurrentindustrystandards.NFPAandNationalFireProtectionAssociationareregisteredtrademarksoftheNationalFireProtectionAssociation,Quincy,Massachusetts02169.22-2WATERTANKSFORPRIVATEFIREPROTECTIONThe2018editionsubstantiallymodiedChapters5and6.InChapter5allduplicaterequirementstoAWWAD100havebeenremovedandreferencetoAWWAD100hasbeenmade;requirementsspecictoreprotectionremaininChapter5.InChapter6allduplicaterequirementstoAWWAD103havebeenremovedandreferencetoAWWAD103made;requirementsspecictoreprotectionremaininChapter6.RequirementsforcheckvalvesinthedischargepipeofasuctiontankhavebeenclariedinChapter14,andtankrepairrequirementshavebeenmodiedrequiringtheimpairmentproceduresofNFPA25tobefollowed.Chapter16hasaddednewcriteriaforelectricimmersionheaters,andthelowestone-daymeantemperaturemaphasbeenremovedinlieuofusingcalculationstodeterminetankheatingneeds.2018EditionCOMMITTEEPERSONNELTechnicalCommitteeonWaterTanksRobertM.Gagnon,ChairGagnonEngineering,MDSE22-3KevinP.Bellew,SprinklerFitters&ApprenticesLocal696,NJLRep.UnitedAssn.ofJourneymen&ApprenticesofthePlumbing&PipeFittingIndustryBabannaBiradar,BechtelIndiaPvtLtd,IndiaSEJohnD.Campbell,GlobalFireProtectionGroup,LLC,MOSEChristopherCulp,HendersonEngineers,Inc.,KSSESullivanD.Curran,FiberglassTank&PipeInstitute,TXMRep.FiberglassTank&PipeInstituteDouglasW.Fisher,FisherEngineering,Inc.,GASEJosephR.Fowler,S.A.ComunaleCompany,Inc.,OHIMGregGarber,PittsburgTank&TowerInc.,VAMAndrewM.Henning,CALFIRE,OfceoftheStateFireMarshal,CAEJackHillman,Hall-WoolfordTankCompany,Inc.,PAMDavidHochhauser,IsseksBrothersIncorporated,NYIMKevinJ.Kelly,Victaulic,PAIMRep.NationalFireSprinklerAssociationRolandA.Asp,NationalFireSprinklerAssociation,Inc.,MDIM(Alt.toKevinJ.Kelly)AndrewJ.Brady,NuclearServiceOrganization,DEI(Alt.toJohnM.Mitchard)PatrickJonBrown,TankIndustryConsultants,INSE(Alt.toGregoryR.Stein)SkipDonnell,LibertyMutualInsuranceCompany,INI(Alt.toToddM.Kidd)ChristineFowler,CALFIRE,OfceoftheStateFireMarshal,CAE(Alt.toAndrewM.Henning)ToddM.Kidd,LibertyMutualInsuranceCompanies,NCINicholasA.Legatos,PreloadIncorporated,NYMRep.AmericanConcreteInstituteKeithMcGuire,CSTStorage,KSMJohnM.Mitchard,NuclearServiceOrganization,DEIBobD.Morgan,FortWorthFireDepartment,TXEThomasWilliamNoble,AmericanFireSprinklerAssociation,TXIMLeonardJ.Ramo,TelgianCorporation,GASEAndrewRosenwach,RosenwachTankCompany,Inc.,NYMRep.NationalWoodTankInstituteDanielSanchez,CityofLosAngeles,CAEMarkA.Sornsin,SummitCompanies,NDIMGregoryR.Stein,TankIndustryConsultants,INSEOwenStevens,FiberTechCorporation,VAMAlternatesJeremyW.John,FisherEngineering,Inc.,GASE(Alt.toDouglasW.Fisher)GaryKoenig,SprinklerFittersLocalUnion696,NJL(Alt.toKevinP.Bellew)R.GregPatrick,TreasureValleyFireProtection,Inc.,IDIMVotingAlternateJohnJ.Sweeney,SmithEngineeredStorageProductsCompany,ILM(Alt.toKeithMcGuire)DanielS.Vandergriff,TelgianCorporation,MOSE(Alt.toLeonardJ.Ramo)JannaE.Shapiro,NFPAStaffLiaisonThislistrepresentsthemembershipatthetimetheCommitteewasballotedonthenaltextofthisedit