1、InternationalStandardISO13348Thirdedition2025-06FansTolerances,methodsofconversionandtechnicaldatapresentationVentilateursTolerances,methodesdeconversionetpresentationdesdonneestechniquesReferencenumberISO13348:2025(en)COPYRIGHTPROTECTEDDOCUMENTISO2025Allrightsreserved.Unlessotherwisespecified,orreq
2、uiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyint
3、hecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandPageContentsIntroductionvi1Scope12Normativereferences.13Termsanddefinitions24Symbolsandabbreviatedterms105Performancetolerancesforpurpo
4、se-designedfansandseries-producednon-certifiedfans135.1Informationtobeprovidedbythepurchaser135.1.1Operational135.1.2Tolerancegrade135.2Informationtobeprovidedbythefansupplier135.2.1Essentialinformation135.2.2Optionalparameters145.3Tolerances145.3.1Tolerancegrades145.4Purchasingarrangements165.5Cont
5、ractualtesting165.5.1Tolerancemagnitudenearoptimumefficiency165.5.2Operationatotherthanoptimumefficiency205.5.3Performanceacceptancetesting216Performancetolerancesforseries-producedfansincertifiedratingsprogrammes.286.1General286.2Fanlaws286.3Check-tests286.4Airperformancetolerances296.4.1Check-test
6、tolerances296.4.2AirflowTolerance296.4.3PowertoleranceTh316.4.4Efficiencytolerance336.4.5Otherefficiencymetrics336.4.6Applicationoftolerances336.5SoundTolerances336.5.1Check-Testtolerances336.5.2Soundtolerancesinoctavebands336.5.3Sonevaluetolerance336.5.4A-weightedsoundpowerlevel337Performancetolera
7、ncesforCategoryEfans(freeinletandfreeoutletwithoutapartition)347.1General347.2PerformancetolerancesforJetfans347.3Performancetolerancesforcirculatingfans357.4Performancetolerancesforaircurtains358Methodsofconversion368.1Conversionofairperformancetestdata368.1.1General.368.1.2Similarity.368.1.3Conver
8、sionrulesandthefanlaws368.1.4Conversionrulesforseries-producedfans378.1.5Conversionrulesforextrapolation37Foreword.v8.1.6 Interpolationforfansincorporatingonesystematicgeometricalchange498.1.7 Otheridentities508.2Conversionofsoundpowertestdata518.2.1 General518.2.2 Conditionsandlimitsforapplicationo
9、fconversionrulestototalsoundpowerlevel518.2.3 Generalizedmethodsforsoundpowerlevelprediction519Technicaldatapresentation589.1 General589.2 Essentialinformation589.3 Fanperformancechart589.4 Additionalinformation609.4.1 Sounddata609.4.2 Electricaldata619.4.3 Mechanicaldata619.4.4 Airperformance619.4.
10、5 Samefanusedfordifferentinstallations61Annex A (normative)Documentation64Annex B (normative)Marking65Annex C (informative)Systemresistanceasafunctionofflowrate66Annex D (informative)Scalingmethod69Bibliography76ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnatio
11、nalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governm
12、ental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thed
13、ifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(Seewww.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopos
14、itionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.However,implementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtai
15、nedfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifict
16、ermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISOsadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT),SeeWWW.iso.org/iso/foreword.htmLThisdocumentwaspreparedbyTechnicalCommitteeISO/TC117,Fans.Thisthirdeditioncancelsandreplacesthesecondediti
17、on(ISO13348:2007),whichhasbeentechnicallyrevised.Themainchangesareasfollows: termshavebeenrevised; symbolsandunitsinCIaUSe4havebeenupdated; ClaUSeS6and7havebeenrevised; additionalinformationprovidedinAnnaXD.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody.Acomplete
18、listingofthesebodiescanbefoundatWWW.iso.org/members.htmLIntroductionThisdocumentaimstoclarifytechnicalaspectsofcontractswherefanperformanceisconcerned,andtheaccuracyandconsistencyOfperformancedetailspublishedintechnicalcatalogues.Inthisdocument,adistinctionisdrawnbetweenspeciallydesignedfanstosuitas
19、pecificpurpose,tomeetacontractspecification,andseries-producedfanswheretheperformancedataiscontainedinacatalogue.Forpurpose-designedfans,themethodsofcalculatingperformancedataundercontractconditions,fromperformancedataobtainedundertestconditions,aredescribedinClaUSe5forbothairandsounddata.Fourtolera
20、ncegradesaregiven,eachappropriatetoaparticulartypeoffanand/oritsapplication.Theseprocedureshavebeenfoundsatisfactory;however,thesupplierandusercanagreetoadoptalternativemethods.Forseries-producednon-certifiedfans,theassociatedtechnicaldatawillbecontainedinacatalogue(electronicand/orprintedform).Inth
21、iscase,therecommendedmethodofapplyingtolerancesisasdescribedinClaUSeS.Forseries-producedfansincertifiedratingsprogrammes,theassociatedtechnicaldatawillbecontainedinacatalogue(electronicand/orprintedform).Inthiscase,therecommendedmethodofapplyingtolerancesisasdescribedinCIaUSe6(basedonAMCA(AirMovemen
22、tandControlAssociation)InternationaInc.certifiedreferenceprogramrules1国，皿.FansTolerances,methodsofconversionandtechnicaldatapresentation1 ScopeThisdocumentspecifiesperformancetolerancesandthetechnicaldatapresentationforfansofalltypes.Itdoesnotapplyforfansdesignedsolelyforlow-volumeaircirculation,suc
23、hasthoseusedforhouseholdorsimilarpurposes(ceilingandtablefans,extractorfans,etc.).Forjetfans,refertoISO13350.Theupperlimitoffanworkperunitmassisnormally25kJkg,correspondingtoanincreaseoffanpressureofapproximately30kPaforameandensityinthefanof1,2kgm3.Forhighervalues,agreementistobereachedbetweenthesu
24、pplierandtheuser.ThisdocumentappliesthefiveinstallationcategoriesdefinedinISO5801:Afreeinlet,freeoutlet;Bfreeinlet,ductedoutlet;Cductedinlet,freeoutlet;Dductedinlet,ductedoutlet;Efreeinletandfreeoutletwithoutapartition.Theperformanceofafancanvaryconsiderablywiththeinstallationcategoryitisoperatingwi
25、thin.Therefore,thesecategoriesformanimportantpartofthedefinitionofthefanstechnicaldatapresentation.NOTEInternationalacceptanceofthefiveinstallationcategoriesprovidestheopportunitytobaseacontractonthemostappropriatefancategoryfortheenduserandthesystemdesigner.Correspondingly,thelikelihoodofthefanprov
26、idingtheagreedperformance,withoutcompromiseorconcession,isenhanced.Theefficiencyscalingproceduresdescribedin8.1.5applytocentrifugalfansandaxialfanswithinthespecificspeedrangesshowninTable4.Todate,thereisnoexperimentaldatatoconfirmhowtheyapplytomixedRowfans,havingspecificspeedsinbetween.CategoryEfans
27、aretreatedinClaUSe7.2 NormativereferencesThefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.ISO
28、5801:2017,FansPerformancetestingusingstandardizedairwaysISO5802,Industrialfans-PerformancetestinginsituISO13347-LIndustrialfansDeterminationoffansoundpowerlevelsunderstandardizedlaboratoryconditionsPart1:GeneraloverviewISO13349-LFanSVocabularyanddefinitionsofcategoriesPart1:VocabularyISO13349-2,Fans
29、VocabularyanddefinitionsOfcategoriesPart2:CategoriesISO2025-AllrightsreservedISO13350,FansPerformancetestingofjetfansISO14694,IndustrialfansSpecificationsforbalancequalityandvibrationlevelsISO14695,IndustrialfansMethodOfmeasurementoffanvibration3 TermsanddefinitionsForthepurposesofthisdocument,thete
30、rmsanddefinitionsgiveninISO5801,ISO5802,ISO13349-LISO13349-2andISO13350andthefollowingapply.ISOandIECmaintainterminologydatabasesforuseinstandardizationatthefollowingaddresses:ISOOnlinebrowsingplatform:availableathttps:WWW.iso.org/obp一IECElectropedia:availableathttps:WWW.electroPediaQrg3.1fanfanothe
31、rthanthatusedforhouseholdorsimilarpurposessuchasaircirculation,ClimatizationNote1toentry:Forthepurposeofthisdocumentandotherindustrialfanstandards,ahouseholdfanisdefinedashavingasingle-phasemotoroperatingatamaximumof250Vand16A.Withasufficientlysoftstart,thisequatestoaninputpowerofnotmorethan3kW.3.2
32、series-producedfanfanwhosedetailedperformancesiswidelyavailableinacatalogue(electronicandorprinted),andwhichisfrequentlymanufacturedinsignificantquantitiesandavailableonshortdelivery3.3 averagestagnationpressureatasectionxPSgXsumoftheconventionaldynamicpressure,pdx,correctedbytheMachfactorcoefficien
33、t,fMx,atthesection,andtheaverageabsolutepressure,pxPSgX=PX+Pdx筛X(I)Note1toentry:TheaveragestagnationpressurecanbecalculatedbyFormulaf2):KPSgX=PXMax1.(2)whereKistheisentropicexponent;PXisthestaticpressureatthesectionx;PdXisthedynamicpressureatthesectionx;mxistheMachfactorcoefficientatthesectionx;MQXi
34、stheMachnumberatthesectionx.Note2toentry:Itisexpressedinpascals(Pa).3.4averagetotalpressureatasectionxPtXsumoftheconventionaldynamicpressure,pcorrectedbytheMachfactorcoefficient,FMx,atthecrosssection,andtheaveragegaugepressure,PeXPtX=Pex+PdxAdx=PSgX-Pa(3)wherePexisthemeangaugepressureatthecross-sect
35、ionx;PdXisthedynamicpressureatthecross-sectionx;mxistheMachfactorcoefficientatthecross-sectionx;Psgxisthestagnationpressureatthecross-sectionx;Paistheatmosphericpressure.Note1toentry:WhentheMachnumber,Ma,islessthan0,122,theMachfactor,FMx,canbeneglectedNote2toentry:SeeISO58013.5characteristicerrorflo
36、wratechangeproducedalongtheactualsystemcharacteristicbythemaximumfanperformancedeviationallowedbythetolerancegradeselectedNote1toentry:Characteristicerrorisafunctionofthetolerancegrade,themeasurementuncertaintyallowed,andtheshape(localslope)ofthefanandactualsystemcharacteristicsNote2toentry:Fortheac
37、tualsystemcharacteristics,seeISO5801.3.6fanaerodynamiccharacteristiccurvesfanpressure,power,efficiency,etc”againstflowrateunderspecifiedambientconditionsandataconstantspeed,orwhenfittedwithaspecifiedmotor3.7fandynamicpressureatoutletPd2conventionaldynamicpressureatthefanoutletcalculatedfromthemassfl
38、owrate,theaveragegasdensityattheoutletandthefanoutletareawhereP2isthefluiddensityatthefanoutlet;vm2isthe11uidvelocityatthefanoutlet;Qmisthemassflowrate;A2isthefanoutletarea.Note1toentry:Itisexpressedinpascals(Pa).3.8fanflowcoefficientnon-dimensionalquantityequaltothemassflowratedividedbytheproductof
39、themeandensity,theperipheralspeedoftheimpellerandthesquareofthediameteroftheimpeller=驾whereQviisthevolumeflowrateatthefaninlet;Dristhediameteroftheimpeller;uisthetipspeedoftheimpeller.3.9fanoutletareaA2areainsidethefanoutletcasingRangeNote1toentry:Itisexpressedinsquaremetres(m2).3.10fanpressurePFdif
40、ferencebetweenthestagnationpressureatthefanoutletandthestagnationpressureatthefaninletPf=Psg2-Psgi(6)PF=PtF=Pt2-PtiifM”0,122wherePsg2isthestagnationpressureatthefanoutlet;Psgiisthestagnationpressureatthefaninlet;Pt2isthetotalpressureatthefanoutlet;Ptiisthetotalpressureatthefaninlet.Note1toentry:When
41、expressingfanpressure,referenceshouldbemadetotheinstallationcategoryA,B,CorD.Note2toentry:Itisexpressedinpascals(Pa).3.11fanstaticpressurePSFconventionalquantitydefinedasthedifferencebetweenthefanpressureandthefandynamicpressurecorrectedbyMachfactor筛2PsF=Psg2-Pd242-Psgi=P2-Psgi(8)PSF=Pt2-PtlPd2ifMa,
42、122atthefanoutletarea(9)wherePsg2isthestagnationpressureatthefanoutlet;Pd2isthedynamicpressureatthefanoutlet;筛2istheMachfactorcoefficientatthefanoutlet;Psgiisthestagnationpressureatthefaninlet;Pt2isthetotalpressureatthefanoutlet;Ptlisthetotalpressureatthefaninlet.Note1toentry:Itisexpressedinpascals(
43、Pa).3.12Machfactor/mcorrectionfactorappliedtothedynamicpressureatapointPSg-PPdwherePSgisthestagnationpressure;Pistheabsolutepressure;Pdisthedynamicpressure.Note1toentry:TheMachfactorcanbecalculatedbyFormulafill:,(2-4(2-k)(22k)Mq6m=1+=hv=kv=Hvahdfor=1,4m424912whereKistheisentropicexponent;MQistheMach
44、number.(io)(11)Note2toentry:Itisdimensionless.3.13MachnumberatapointMaratiooftheairvelocitytothevelocityofsoundatthefaninletstagnationconditionsMa=.=SJKRwBSgcwhere(12)cisthevelocityofsound,c=IRWBSg；visthefluidvelocity;Kistheisentropicexponent;Rwisthegasconstantofhumidgas;sgisthestagnationtemperature
45、Note1toentry:Itisdimensionless.3.14MachnumberatasectionxMaaveragegasvelocitydividedbythevelocityofsoundatthespecifiedairwaycross-sectionMQX=-X=(13)JKRXsgxwherevxisthe11uidvelocityatthecross-sectionx;Kistheisentropicexponent;RWisthegasconstantofhumidgas;sgxisthestagnationtemperatureatthecross-sectio
46、nx.Note1toentry:Itisdimensionless.3.15efficiencyratiooffanairpowertothefanimpellerpower殳=殳也=义(14)PrPmPrXwherePisthefanairpower;Pristhefanimpellerpower;QmisthemassRowrate;PFisthefanpressure;Pmisthemeanfluiddensity;isthefanflowcoefficient;isthefanpressurecoefficient;isthefanpowercoefficient.Note1toentry:Itisexpressedasapercentage.3.16optimumefficiencyoptmaximumefficiencyachievedonthefanaircharacteristicwithalloperationalparameters,excepttheairsystemresistance,beingfixedNote1toentry:T
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