1、EN13237October2024SupersedesEN13237:2012EuropeanstandardNormeeuropeenneEuropaischenormICS01.040.13;01.040.29;13.230;29.260.20EnglishVersionPotentiallyexplosiveatmospheres-TermsanddefinitionsforequipmentandprotectivesystemsintendedforuseinpotentiallyexplosiveatmospheresAtmospheresexplosibles-Termeset
2、definitionspourlesappareilsetsystemesdeprotectiondestinesaetreutilisesenatmospheresexplosiblesExplosionsgefahrdeteBereiche-BegriffefiirGerateundSchutzsystemezurVerwendunginexplosionsgefahrdetenBereichenThisEuropeanStandardwasapprovedbyCENon12August2024.CENmembersareboundtocomplywiththeCEN/CENELECInt
3、ernalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinth
4、reeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Croatia,Cyprus,
5、CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATI
6、ONCOMITEEUROPEENDENORMALISATIONEuropaischeskomiteefurnormungCEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussels2024CENAllrightsofexploitationinanyformandbyanymeansreservedRef.No.EN13237:2024EworldwideforCENnationalMembers.PageContentsEuropeanforeword3Introduction41 Scope52 Normativereference
7、s53 Termsanddefinitions5AnnexA(informative)DefinitionsfromDirective2014/34/EUandcorrigenda28AnnexB(informative)SignificantchangesbetweenthisdocumentandEN13237:2012.31AnnexZA(informative)RelationshipbetweenthisEuropeanStandardandtheessentialrequirementsofDirective2014/34/EUaimedtobecovered36Bibliogra
8、phy37EuropeanforewordThisdocument(EN13237:2024)hasbeenpreparedbyTechnicalCommitteeCEN/TC305,Potentiallyexplosiveatmospheres-ExplosionpreventionandprotectionthesecretariatofwhichisheldbyDIN.ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsemen
9、t,atthelatestbyApril2025,andconflictingnationalstandardsshallbewithdrawnatthelatestbyApril2025.Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CENshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.ThisdocumentsupersedesEN13237:2012.Thesig
10、nificanttechnicalchangesbetweenthisdocumentandEN13237:2012aregiveninAnnexB,TableB.l.ThisdocumenthasbeenpreparedunderastandardizationrequestaddressedtoCENbytheEuropeanCommission.TheStandingCommitteeoftheEFTAStatessubsequentlyapprovestheserequestsforitsMemberStates.ForrelationshipwithEuLegislation,see
11、informativeAnnexZA,whichisanintegralpartofthisdocument.Anyfeedbackandquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody.AcompletelistingofthesebodiescanbefoundontheCENwebsite.AccordingtotheCEN-CENELECInternalRegulations,thenationalstandardsorganisationsofthefollowingcountriesareb
12、oundtoimplementthisEuropeanStandard:Austria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,S
13、weden,Switzerland,TiirkiyeandtheUnitedKingdom.IntroductionThisdocumenthasbeenproducedtoassistdesigners,manufacturersandotherinterestedpartiestouseharmonizedtermsanddefinitions(vocabulary)forequipmentandprotectivesystemsintendedforuseinpotentiallyexplosiveatmospheres.Itdescribesthevocabularytobeusedt
14、ogiveallstandardsinthisareaanoveralluniformityofterminology.Throughoutthisdocument,theonlyhazardconsideredistheexplosionofanexplosiveatmosphere.1 ScopeThisdocumentspecifiestermsanddefinitions(vocabulary)tobeusedinsuitablestandardsdealingwithequipmentandprotectivesystemsintendedforuseinpotentiallyexp
15、losiveatmosphereswithinthescopeofDirective2014/34/EU.NOTETermsanddefinitionsavoidmisunderstandingsthatareimportantinrelationtotheessentialhealthandsafetyrequirementsofDirective2014/34/EU.2 NormativereferencesTherearenonormativereferencesinthisdocument.3 TermsanddefinitionsForthepurposesofthisdocumen
16、t,thefollowingtermsanddefinitionsapply.ISOandIECmaintainterminologydatabasesforuseinstandardizationatthefollowingaddresses:一IECElectropedia:availableathttps:/www.electropedia.org/一ISOOnlinebrowsingplatform:availableathttps:/www.iso.org/obp3.1airflowvelocityvolumeofairm3whichflowsthroughadefinedsurfa
17、cemAsimpactedbyENIEC60079-0:2018/AC:2020-02andENIEC60079-0:2018/All:2024.Tobepublished.Stageatthetimeofpublication:FprENISO/IEC80079-49.perunittimesSOURCE:EN17077:2018,3.13.2ambientatmospherenormalatmospheresurroundingtheequipmentandprotectivesystem3.3ambienttemperaturetemperatureoftheairorothermedi
18、a,intheimmediatevicinityoftheequipmentorcomponentSOURCE:ENIEC60079-0:20181,3.1,modified-Note1toentry,Note2toentryandNote3toentryhavebeenremoved3.4atmosphericconditionsconditionswithpressuresrangingfrom80kPato110kPaandtemperaturesrangingfrom-20to+60oCSOURCE:ENISO16852:2016,3.25Note1toentry:ENISO16852
19、willbereplacedbyENISO/IEC80079-492.3.5combustibledustfinelydividedsolidparticles,500morlessinnominalsize,whichcanformexplosivemixtureswithairatstandardatmosphericpressureandtemperaturesNote1toentry:ThisincludesdustandgritasdefinedinISO4225:2020.Note2toentry:Thetermr,solidparticles,isintendedtoaddres
20、sparticlesinthesolidphasebutdoesnotprecludeahollowparticle.SOURCE:ENISO/IEC80079-20-2:2016AsimpactedbyENISO/IEC80079-20-2:2016/AC:2017.,3.1,modifiedmayhasbeenreplacedwithcan;referencedateinNote1toentryhasbeenupdated3.5.1 conductivedustcombustiblemetaldustsandothercombustibledustswithelectricalresist
21、ivityequaltoorlessthan1103mNote1toentry:Metaldustistreatedasconductivedustbecauseitisassumedthatsurfaceoxidationcannotbedependedupontoalwaysensureelectricalresistivitygreaterthan1IO3mSOURCE:ENISO/IEC80079-20-2:20163,3.1.13.5.2non-conductivedustcombustibledustwithelectricalresistivitygreaterthan1103m
22、SOURCE:ENISO/IEC80079-20-2:20163,3.1.23.6combustibleflyingssolidparticles,includingfibres,whereonedimensionisgreaterthan500minnominalsize,whichmayformanexplosivemixturewithairatstandardatmosphericpressureandtemperatureNote1toentry:Theratiooflengthtowidthis3ormore.Note2toentry:Examplesofflyingsinclud
23、ecarbonfibre,rayon,cotton(includingcottonlintersandcottonwaste),sisal,jute,hemp,cocoafibre,oakumandbaledwastekapok.SOURCE:ENISO/IEC80079-20-2:20163,3.23.7constructionalsafetycignitionprotectionwhereconstructionalmeasuresareappliedsoastoprotectagainstthepossibilityofignitionfromhotsurfaces,sparksanda
24、diabaticcompressiongeneratedbymovingpartsSOURCE:ENISO80079-37:2016,3.13.8controlofignitionsourcebignitionprotectionwheremechanicalorelectricaldevicesareusedinconjunctionwithnonelectricalequipmenttomanuallyorautomaticallyreducethelikelihoodofapotentialignitionsourcefrombecominganeffectiveignitionsour
25、ceNote1toentry:Thismightforexamplebealevelsensorusedtoindicatelossofoil,atemperaturesensortoindicateahotbearingoraspeedsensortoindicateover-speed.SOURCE:ENISO80079-37:2016,3.33.9controlmeasure3.9.1automaticcontrolmeasureactiontakenwithoutmanualintervention,toreducethelikelihoodofapotentialignitionso
26、urcefrombecominganeffectiveignitionsourceSOURCE:ENISO80079-37:2016,3.3,13.9.2manualcontrolmeasureactiontakenbyapersonasaresultofawarning,indication,oralarm,toreducethelikelihoodofapotentialignitionsourcefrombecominganeffectiveignitionsourceSOURCE:ENISO80079-37:2016,3.3.23.10ignitionpreventiondevicei
27、gnitionpreventionsystemarrangementthatconvertssignalsfromoneormoresensorsintoanaction,orindication,toreducethelikelihoodofapotentialignitionsourcefrombecominganeffectiveignitionsourceSOURCE:ENISO80079-37:2016,3.3.3,modified-11ignitionpreventionCieViCeS/systemshasbeenreplacedwith11ignitionpreventiond
28、evice,and11ignitionpreventionsystem”3.11safetydevicedeviceintendedforuseinsideoroutsideexplosiveatmospheresbutrequiredfororcontributingtothesafefunctioningofequipmentandprotectivesystemswithrespecttotherisksofexplosionSOURCE:ENISO80079-37:2016,3.3.4,modified-deviceshasbeenreplacedwithdevice”(twice)3
29、12continuousgradeofreleasereleasewhichiscontinuousorisexpectedtooccurfrequentlyorforlongperiodsSOURCE:ENIEC60079-10-1:2021,3.4.2,modified-Note1toentryhasbeendeleted3.13deflagrationexplosionpropagatingatsubsonicvelocitySOURCE:ISO8421-1:1987,1.113.14degreeofprotectionextentofprotectionprovidedbyanenc
30、losureagainstaccesstohazardousparts,againstingressofsolidforeignobjectsand/oringressofwaterandverifiedbystandardisedtestmethodsSOURCE:EN60529:199133.33.15detonationexplosionpropagatingatsupersonicvelocityandcharacterisedbyashockwaveSOURCE:ISO8421-1:1987,1,123.16dustsmallsolidparticlesintheatmosphere
31、whichsettleoutundertheirownweight,butwhichmayremainsuspendedinairforsometimeNote1toentry:Generallycombustibledustswithamedianvalueoftheparticlediameterbelow500mmayformexplosibledust/air-mixtures.SOURCE:EN14034-l:2004+Al:2011,3.1,modified-Note1toentryhasbeenchanged3.17electricalequipmentitemsapplieda
32、sawholeorinpartfortheutilisationofelectricalenergyNote1toentry:Theseinclude,amongothers,itemsforthegeneration,transmission,distribution,storage,measurement,regulation,conversionandconsumptionofelectricalenergyanditemsfortelecommunications.SOURCE:ENIEC60079-0:20181,3.31,13.18electrostaticleakageresis
33、tanceelectricalresistancemeasuredbetweenanobjectandearthSOURCE:EN14983:2007,3.13.19enclosure(ofequipmentorprotectivesystem)allthewallsincludingdoorslcovers,cableentries,rods,spindlesandshaftswhichcontributetothetypeofprotectionand/ortheirdegreeofprotection(IP)4AsimpactedbyEN60529:1991/Al:2000,EN6052
34、9:1991/A2:2013,EN60529:1991/AC:2016-12andEN60529:1991/corrigendumMay1993.3.20equipmentgroupingclassificationsystemofequipmentrelatedtotheexplosiveatmosphereforwhichtheyareintendedtobeusedSOURCE:ENIEC60079-0:20183.32,modified-Note1toentrydeleted3.21ExComponentpartofExEquipmentoramodule,markedwiththeS
35、ymbOIU,whichisnotintendedtobeusedaloneandrequiresadditionalconsiderationwhenincorporatedintoExEquipmentorsystemsforuseinexplosiveatmospheresSOURCE:ENISO80079-36:2016AsimpactedbyENISO80079-36:2016/AC:2019.,3.93.22ExEquipmentequipmentwheremeasureshavebeenappliedtoensurethateffectiveignitionsourcesarem
36、itigatedasrequiredbytheEquipmentProtectionLevel(EPL)Note1toentry:Thisincludestheignitionhazardassessmentand/orprotectivemeasuresinaccordancewithENISO8007936:2016.SOURCE:ENISO80079-36:20165,3.11,modified-intheNote1toentry11thisStandardnhasbeenreplacedwiththestandardreference3.23explosionsuddenincreas
37、eofpressureandtemperature,duetooxidationorotherexothermicreactionSOURCE:ENISO/IEC80079-38:2016AsimpactedbyENISO/IEC80079-38:2016/Al:2018.,3.63.24explosionregionareainsidetheboundarycurveformedbytheexplosionlimitsofaflammablesubstanceinvariousmixtureswithairandinertgasNote1toentry:Inmanycasestheairco
38、ncentrationattheapexoftheboundarycurveCorrespondstothelimitingairconcentration,LAC.Note2toentry:Inmanycasesthisisalsocalledexplosionrange.Key1 explosionregion2 apex3 stoichiometriclinexmolarfractionin%INinertgasTStestsubstanceaairLACLimitingairconcentrationLELLowerexplosionlimitUELUpperexplosionlimi
39、tFigure1Explosionregionforaternarysystemoftestsubstance,airandinertgas3.25explosiondiverterpassivedevicetypicallyinstalledinaductpreventingflamejetignition,pressurepilingandreducingtheprobabilityofflametransmissionintoconnectedequipment3.26explosionisolationflapvalvevalvecontainingaflapwhichisfixedt
40、othehousingonanaxisperpendiculartotheflowdirection,keptopenbytheprocessflowandabletostopexplosionsfrompropagatingthroughpipelinesinthedirectionoppositetothenormalprocessflowthroughthevalveSOURCE:EN16447:2014,3.1,modified-Note1toentryhasbeendeleted3.27explosionisolationsystem1.1.1 1activeexplosioniso
41、lationsystemprotectivesystemwhichisdesignedtostopexplosionsfromtravellingthroughpipelinesandisactivatedbydetectorsandcontrolandindicatingequipment(ClE)whichareinherentpartsofthesystemSOURCE:EN15089:2009,3.7.1,modifieddefinitionhasbeenchanged1.1.2 2passiveexplosionisolationsystemprotectivesystemwhich
42、isdesignedtostopexplosionsfromtravellingthroughpipelinesanddoesnotrequiredetectorsandacontrolandindicatingequipment(ClE)SOURCE:EN15089:2009,3.7.2,modifieddefinitionhasbeenchanged3.28explosionlimits3.28.1lowerexplosionlimitLELlowestconcentrationoftheexplosionrangeNote1toentry:Thoseconcentrationsaregi
43、venatwhichanexplosionjustfailsduringthetests.SOURCE:EN1839:2017,33modified-Note1toentry3.28.2upperexplosionlimitUELhighestconcentrationoftheexplosionrangeNote1toentry:Thoseconcentrationsaregivenatwhichanexplosionjustfailsduringthetests.SOURCE:EN1839:2017,34,modified-Note1toentry3.29explosionpoints3.
44、29.1lowerexplosionpointtemperatureofaflammableliquidatwhichtheconcentrationofthesaturatedvapourinairisequaltothelowerexplosionlimit3.29.2upperexplosionpointtemperatureofaflammableliquidatwhichtheconcentrationofthesaturatedvapourinairisequaltotheupperexplosionlimit3.30explosionpressurePeXhighestpress
45、ureoccurringinaclosedvesselduringtheexplosionofaspecificmixtureofflammablesubstanceswithairorairandinertgasesdeterminedunderspecifiedtestconditionsNote1toentry:PeXiSexpressedasabsolutepressurewithgasesandvapourandasoverpressurewithdusts.SOURCE:EN15967:2022,3.1,modified-Note1toentryhasbeenmodified3.3
46、0.1maximumexplosionpressurePrnaXmaximumvalueofexplosionpressuremeasuredinthetestsforexplosionpressurewhenthecontentoftheflammablesubstancesinthemixtureisvariedNote1toentry:PmaXiSexpressedasabsolutepressurewithgasesandvapourandasoverpressurewithdusts.SOURCE:EN15967:2022,3.2,modified-Note1toentryhasbe
47、enmodified3.30.2rateofexplosionpressurerise(dpdt)ehighestvalueoftheslope(firstderivative)ofthepressure-timecurve(smoothedifnecessary),measuredinaclosedvesselduringtheexplosionofaspecificmixtureofflammablesubstanceswithairorairandinertsubstancesdeterminedunderspecifiedtestconditionsSOURCE:EN15967:2022,3.33.30.3maximumrateofexplosionpressurerise(dpdtmaxmaximumvalueoftheexplosionpressureriseperunittimemeasuredinthetestswhenthecontentoftheflammablesubstancesinthemixtureisvariedSOURCE:EN15967:2022,3.4,modified-Note1toentryhasbeendeleted3.
