EN12874

EUROPEANSTANDARDNORMEEUROPÉENNEEUROPÄISCHENORMEN12874January2001ICS13.230EnglishversionFlamearresters-Performancerequirements,testmethodsandlimitsforuseArrête-flamme-Exigencesdeperformance,méthodesd'essaietlimitesd'utilisationFlammendurchschlagsicherungen-Leistungsanforderungen,PrüfverfahrenundEinsatzgrenzenThisEuropeanStandardwasapprovedbyCENon24November2000.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITÉEUROPÉENDENORMALISATIONEUROPÄISCHESKOMITEEFÜRNORMUNGManagementCentre:ruedeStassart,36B-1050Brussels©2001CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.Ref.No.EN12874:2001EPage2EN12874:2001ContentsPageForeword.............................3Introduction...........................31Scope...........................32Normativereferences...............43Termsanddefinitions,symbolsandabbreviations.........................53.1Termsanddefinitions................53.2Symbolsandabbreviations............84Hazardsandflamearresterclassifications.....................94.1Flametransmission:Deflagration,stableandunstabledetonation.................94.2Flametransmission:Stabilisedburning..105Generalrequirements..............105.1Construction......................105.2Housings........................105.3Joints..........................105.4Jointstoadjacentpipework...........115.5Pressuretest.....................115.6Leaktest........................115.7Flowmeasurement(air).............115.8Flametransmissiontest..............126Specificrequirementsforstaticflamearresters...................146.1Construction.....................146.2Designseries....................146.3Flametransmissiontest.............156.4Limitsforuse.....................227Specificrequirementsforliquidproductdetonationflamearresters..........227.1Liquidseals......................227.2Footvalves......................237.3Flametransmissiontest.............237.4Limitsforuse.....................24Page8Specificrequirementsforhighvelocityventvalves.....................248.1Flametransmissiontest.............248.2Enduranceburningtest.............248.3Deflagrationtest..................258.4Additionalburningtest..............258.5Flametransmissiontestbyopeningandclosing......................258.6Limitsforuse....................269Specificrequirementsforflowcontrolledapertures.......................269.1Equipment......................269.2Flametransmissiontest.............269.3Limitsforuse....................2610Specificrequirementsforhydraulicflamearresters.......................2710.1Equipment......................2710.2Flametransmissiontests............2710.3Limitsforuse....................2811Specificrequirementsfortestingflamearrestersinequipment........2911.1Flametransmissiontestincompressors,includingblowers,fansandvacuumpumps2912Informationforuse...............3012.1Accompanyingdocuments...........3012.2Marking........................30AnnexA(normative)Flowmeasurement....32AnnexB(normative)Graphicsymbolsforflamearresters...............35AnnexC(informative)Guidelinesforspecifyingflamearresters..................38AnnexD(informative)Bestpractice........39AnnexZA(informative)ClausesoftheEuropeanStandardaddressingessentialrequirementsorotherprovisionsofEUDirectives..................40Bibliography..........................41Page3EN12874:2001ForewordThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC305Potentiallyexplosiveatmospheres-Explosionpreventionandprotection,thesecretariatofwhichisheldbyDIN.ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbyJuly2001,andconflictingnationalstandardsshallbewithdrawnatthelatestbyJuly2001.ThisEuropeanStandardhasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropeanFreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s).ForrelationshipwithEUDirective(s),seeinformativeAnnexZA,whichisanintegralpartofthisstandard.AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom.IntroductionThisEuropeanStand