SIST EN 1127-2:2002
(Main)Explosive atmospheres - Explosion prevention and protection - Part 2: Basic concepts and methodology for mining
Explosive atmospheres - Explosion prevention and protection - Part 2: Basic concepts and methodology for mining
This European Standard gives general guidelines for explosion prevention and protection in mining by outlining the basic concepts and methodology for the design and construction of equipment, protective systems and components.
This European Standard applies to Group I equipment, protective systems and components intended for use in underground parts of mines and those parts of their surface installations at risk from firedamp and/or flammable dust.
NOTE Detailed information on specific equipment, protective systems and components is contained in the relevant individual standards. Safety-relevant data regarding flammable materials and explosive atmospheres are required for the design and construction of the explosion protection measures
This European Standard specifies methods for the identification and assessment of hazardous situations that may lead to explosions and describes the design and construction measures appropriate for the required safety. This is achieved by
- hazard identification;
- risk assessment;
- elimination or minimization of risk;
- information for use.
The safety of equipment, protective systems, and components can be achieved, as described in EN 292-2:1991, by removal of hazards and/or limiting the risk, i.e.
a) by risk reduction by design;
b) by safeguarding;
c) by information for use;
d) by additional precautions.
NOTE Risk reduction by design in accordance with clause 3 of EN 292-2:1991 should not be confused with the concept of "design" as described in 6.5 of this standard.
Measures in accordance with a) (prevention) and b) (protection) against explosions are dealt with in clause 6 of this standard, measures according to c) against explosions are dealt with in clause 7 of this standard. Mea-sures in accordance with d) are not described in this European Standard. They are dealt with in clause 6 of EN 292-2:1991.
Explosionsfähige Atmosphären - Explosionsschutz - Teil 2: Grundlagen und Methodik in Bergwerken
Diese Europäische Norm gilt für Geräte, Schutzsysteme und Komponenten der Gruppe I, zur Verwendung in Untertagbetrieben von Bergwerken sowie deren Übertageanlagen, die durch Grubengas und/oder brennbare Stäube gefährdet werden können. Diese Europäische Norm legt Verfahren zum Erkennen und Beurteilen von gefährlichen Situationen, die zu Explosionen führen können fest und beschreibt geeignete Planungs- und Fertigungsmaßnahmen, um die erforderliche Sicherheit zu erreichen.
Atmospheres explosives - Prévention de l'explosion et protection contre l'explosion - Partie 2: Notions fondamentales et méthodologie dans l'exploitation des mines
La présente Norme européenne est un guide général pour la prévention de l'explosion et la protection contre les effets de l'explosion dans l'industrie miniere qui précise les notions fondamentales et la méthodologie relatives a la conception et a la construction des appareils, systemes de protection et autres composants.
La présente Norme européenne s'applique aux appareils, systemes de protection et composants du groupe I destinés aux travaux souterrains des mines et aux parties de leurs installations de surface susceptibles d'etre mis en danger par le grisou et/ou des poussieres combustibles.
NOTE Des informations détaillées sur les appareils, les systemes de protection et les composants spécifiques sont données dans des normes séparées appropriées. La conception et l'élaboration des mesures de prévention et de protection contre l'explosion nécessitent la détermination des données adaptées de sécurité des substances inflammables et des atmospheres explosives.
Cette norme européenne spécifie des méthodes d'identification et d'appréciation des situations dangereuses pouvant conduire a l'explosion ainsi que les mesures de conception et de construction appropriées pour assurer la sécurité requise. Ceci est obtenu par :
3 l'identification du phénomene dangereux ;
3 l'appréciation du risque ;
3 la suppression ou la réduction du risque ;
3 des informations pour l'utilisation.
La sécurité des appareils, systemes de protection et composants, peut etre atteinte par l'élimination des phénomenes dangereux et/ou la limitation du risque, tel qu'indiqué dans l'EN 292-2
a) par une conception réduisant le risque ;
b) a l'aide de dispositifs de protection ;
c) au moyen d'informations pour l'utilisation ;
d) par des dispositions supplémentaires.
Eksplozivne atmosfere - Preprečevanje eksplozije in zaščita pred njo - 2. del: Osnovni pojmi in metodologija za rudarstvo
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Explosionsfähige Atmosphären - Explosionsschutz - Teil 2: Grundlagen und Methodik in BergwerkenAtmospheres explosives - Prévention de l'explosion et protection contre l'explosion - Partie 2: Notions fondamentales et méthodologie dans l'exploitation des minesExplosive atmospheres - Explosion prevention and protection - Part 2: Basic concepts and methodology for mining73.020Rudarstvo in kamnolomsko izkopavanjeMining and quarrying13.230Varstvo pred eksplozijoExplosion protectionICS:Ta slovenski standard je istoveten z:EN 1127-2:2002SIST EN 1127-2:2002en01-september-2002SIST EN 1127-2:2002SLOVENSKI
STANDARD
SIST EN 1127-2:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1127-2April 2002ICS 13.230English versionExplosive atmospheres - Explosion prevention and protection -Part 2: Basic concepts and methodology for miningAtmosphères explosives - Prévention de l'explosion etprotection contre l'explosion - Partie 2: Notionsfondamentales et méthodologie dans l'exploitation desminesExplosionsfähige Atmosphären - Explosionsschutz - Teil 2:Grundlagen und Methodik in BergwerkenThis European Standard was approved by CEN on 31 August 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1127-2:2002 ESIST EN 1127-2:2002
EN1127-2:2002(E)2ContentsForeword.4Introduction.51Scope.72Normativereferences.93Terms,definitionsandabbreviatedterms.104Hazardidentification.135Elementsofriskassessment.145.1General.145.2Determiningtheamountandlikelihoodofanoccurrenceofanexplosiveatmosphere.145.2.1General.145.2.2Degreeofdispersionofflammablesubstances.155.2.3Concentrationofflammablesubstances.155.2.1Amountofexplosiveatmosphere.155.3Determiningthepresenceofeffectiveignitionsources.155.3.1General.155.3.2Hotsurfaces.155.3.3Flamesandhotgases(includinghotparticles).165.3.4Mechanicallygeneratedsparks.165.3.5Electricalapparatus.165.3.6Strayelectriccurrents.165.3.7Staticelectricity.165.3.8Lightning.165.3.9Radiofrequency(RF)electromagneticwavesfrom104Hzto3x1012Hz(highfrequency).165.3.10Electromagneticwavesfrom3x1011Hzto3.x1015Hz.175.3.11Ionizingradiation.175.3.12Ultrasonics.175.3.13Adiabaticcompressionandshockwaves.175.3.14Exothermicreactions,includingself-ignitionofdusts.175.4Estimatingthepossibleeffectsofanexplosion.176Eliminationorminimizationofrisk.186.1Fundamentalprinciples.186.2Avoidanceorreductionofexplosiveatmosphere.186.2.1General.186.2.2Processparameters.196.2.3Designandconstructionofequipment,protectivesystemsandcomponentscontainingflammablesubstances.206.3Classificationofhazardousatmosphericconditions.206.3.1General.206.3.2Hazardousatmosphericconditions.216.4Requirementsfordesignandconstructionofequipment,protectivesystemsandcomponentstoavoideffectiveignitionsources.216.4.1General.216.4.2Hotsurfaces.226.4.3Flamesandhotgases.236.4.4Mechanicallygeneratedsparks.236.4.5Electricalapparatus.246.4.6Strayelectriccurrentsandcathodiccorrosionprotection.246.4.7Staticelectricity.246.4.8Lightning.246.4.9Radiofrequency(RF)electromagneticwavesfrom104Hzto3x1012Hz.246.4.10Electromagneticwavesfrom3x1011Hzto3x1015Hz.25SIST EN 1127-2:2002
EN1127-2:2002(E)36.4.11Ionizingradiation.256.4.12Ultrasonics.266.4.13Adiabaticcompressionandshockwaves.266.4.14Exothermicreactions,includingself-ignitionofdusts.266.5Requirementsfordesignandconstructionofequipment,protectivesystemsandcomponentstoreducetheexplosioneffects.266.5.1General.266.5.2Explosion-resistantdesign.276.5.3Explosionrelief.276.5.4Explosionsuppression.276.5.5Avoidanceofexplosionpropagation(explosiondecoupling).276.5.6Specialequipmentforundergroundmining.276.6Provisionsforemergencymeasures.286.7Principlesformeasuringandcontrolsystemsforexplosionpreventionandprotection.287Informationforuse.297.1General.297.2Informationonequipment,protectivesystemsandcomponents.297.3Informationforcommissioning,maintenanceandrepairtopreventexplosion.307.4Qualificationsandtraining.30AnnexA(informative)Relationbetweencategoriesandhazardousatmosphericconditions.31AnnexZA(informative)ClausesofthisEuropeanStandardaddressingessentialrequirementsorotherprovisionsofEUDirectives.35Bibliography.36SIST EN 1127-2:2002
EN1127-2:2002(E)4ForewordThisdocument(EN1127-2:2002)hasbeenpreparedbyCEN/TC305,"Potentiallyexplosiveatmospheres-Explosionpreventionandprotection",thesecretariatofwhichisheldbyDIN.ThisEuropeanStandardhastobeimplementedatnationallevel,eitherbypublicationofanidenticaltextorbyendorsementbyOctober2002,andconflictingnationalstandardshavetobewithdrawnbyOctober2002.ThisdocumenthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropeanFreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s).ForrelationshipwithEUDirective(s),seeinformativeAnnexZA,whichisanintegralpartofthisstandard.AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisdocument:Austria,Belgium,theCzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom.SIST EN 1127-2:2002
EN1127-2:2002(E)5IntroductionGeneralCENandCENELECareproducingaseriesofstandardstoassistdesigners,manufacturersandotherinterestedbodiestointerprettheessentialsafetyrequirementsinordertoachieveconformitywithEuropeanlegislation.WithinthisseriesofstandardsCENhasundertakentodrawupastandardtogiveguidanceinthefieldofexplosionpreventionandprotection,ashazardsfromexplosionsaretobeconsideredinaccordancewithEN292-1.TheEuropeanStandardhasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropeanFreeTradeAssociation,andsupportsessentialhealthandsafetyrequirements.-ofDirective98/37/ECoftheEuropeanParliamentandoftheCouncilontheapproximationofthelawsoftheMemberStatesrelatingtomachinerywhichin1.5.7ofitsAnnexIrequiresthatmachineryshallbedesignedandconstructedtoavoidanyriskofexplosionaswellas-ofDirective94/9/ECoftheEuropeanParliamentandoftheCouncilontheapproximationofthelawsoftheMemberStatesconcerningequipmentandprotectivesystemsintendedforuseinpotentiallyexplosiveatmospheres(calledATEX-100a-Directive)InaccordancewithEN292-1,itisatypeAstandard.SpecialconsiderationsforminingExplosionscanresultfrom:-materialsprocessedorusedbytheequipment,protectivesystemsandcomponents,e.g.mineralsobtainedaspartofthewinningprocess;-materialsreleasedbytheequipment,protectivesystemsandcomponents;-materialsinthevicinityoftheequipment,protectivesystemsandcomponents;-materialsofwhichtheequipment,protectivesystemsandcomponentsareconstructed.Astheexplosionprotectionofequipment,protectivesystemsandcomponentsdependson-thedesignandconstructionoftheequipment,protectivesystemsandcomponents;-theintendeduse;-theambientconditions;-thematerialsextractedandhandledthisstandardalsoincludesaspectsrelatedtothesefactors,i.e.themanufacturershallconsiderhowandforwhattheequipment,protectivesystemsandcomponentswillbeusedandtakethisintoaccountduringtheirdesignandconstruction.Onlyinthiswaycanhazardsinherentinequipment,protectivesystemsandcomponentsbereduced.NOTEThisstandardmayalsoserveasaguideforusersofequipment,protectivesystemsandcomponentswhenassessingtheriskofexplosionintheworkplaceandselectingtheappropriateequipment,protectivesystemsandcomponents.Minescanbeeithergassyornon-gassydependinguponthemineral/materialbeingextractedandwhetherornotfiredampcanoccurintheworkings.Itisusualpracticetoconsiderallcoalminesasgassymines.Non-coalminescan,however,alsobesusceptibletotheoccurrenceoffiredampe.g.ifminerals/materialsarebeingextractedinthevicinityofoil-bearingstrataorunworkedcoalseamswhicharedisturbedbytheextractionprocessorminessusceptibletooutburstsofflammablegas.SIST EN 1127-2:2002
EN1127-2:2002(E)6Inmineswhereflammableminerals/materialsareextracted,therecanalsobeariskofexplosionsbecausesmallparticlesoftheextractedproductcanbeblownintotheairtoformdust/airmixturesabletosupportrapidcombustion.Flammabledustcaneitherbeanexplosionriskonitsown(whenintheformofanexplosivedust/airmixture),oritcansettleinlayerswhichmaybeblownfromthefloorandsidesoftheroadwaysbyafiredampexplosion.Inthelattercase,theexplosiveviolencecanincreasemanyfoldasmoreandmorefuelintheformofflammabledustisraisedbyablastwaveandaddedtotheflameasittravelsalongtheroadways.Theriskofanexplosiveatmosphereoccurringanditsconsequenceswillthereforevaryfromminetomine,dependingonthetypeofmine,itslayout,themineralbeingextractedandthelikelihoodoffiredampand/orflammabledustoccurring.Incoalmining,firedampandcoaldustnaturallyassociatedwiththecoalisreleasedbytheactivityoftheminers.Therefore,thepotentialexplosionriskisgreaterasaresultofexplosiveair/gasorair/dustmixturesformingthatcannotbetotallyexcludedbythepreventivemeasurestaken.Firedamp/airmixturesareusuallydilutedbytheventilationandevacuatedtothesurfaceviathemineworkingssothatthegascontentinnormaloperationiskeptfarbelowthelowerexplosionlimit.However,asaresultofsystemmalfunction(e.g.fanfailure),suddenreleaseoflargegasquantities(gasoutbursts)orintensifiedgasreleasecausedbydecreasingairpressureorbyincreasedcoalproduction,thepermissiblegasconcentrationthresholdsmaybeexceeded.Theexplosiveatmospherecausedinthisway,eventhoughlimitedinspaceand/ortime,maycauseahazardnotjustatitspointoforiginbutalsointheescaperoads,wasteairpathsandotherconnectedminestructuresintheminelayoutCoaldust/airmixturesareusuallyneutralizedatthedustsourcebywatersprays,dustremovalsystemsonheadingmachinesand/ortreatingwithinertdustinordertoreducetheexplosivepotential.However,anexplosionhazardcanexistifexplosivedustcanbecomeairborne,e.g.attransferpoints,inbunkersandotherconveyingsystems.Incontrasttosurfaceindustries,ingassymineselectricalandnon-electricalequipmentandminingpersonnelareinpermanentcontactwithgasand/ordust/airmixtureswhich,underunfavourableconditions,mayconstituteexplosiveatmospheres.Accordingly,particularlystringentsafetyrequirementsareinforceforexplosionprotectionandescapepossibilitiesintheeventofahazard.Duetothepossiblydevastatingeffectsofundergroundgas/dustexplosions,undergroundminingispermittedonlywelloutsidetheexplosionrange.AsadeviationfromEN1127-1:1997“Explosiveatmospheres–Explosionpreventionandprotection-Part1:Basicconceptsandmethodology",whichdoesnotcovermining,theterm"area"isnotusedforthecategorizationofundergroundworkingsexposedtoexplosionhazardsbecausenormallythistermstandsforaclearlydimensionallyspecifiedspacearoundagenerallystationarytechnicalinstallation,e.g.achemicalplantwithfixedinstallationsandspecifiedlimitsaroundthemanufacturingprocess.Therefore,Directive94/9/EECdealswiththeminingandnon-miningindustriesseparatelybyhavingequipmentcategoryIforminingandequipmentcategoryIIfornon-miningindustry.Ingassymines,thedecisionastowhetherornotmineworkerscanoperateinaparticularworkplacedependsupontheatmosphericconditionsprevailingatthetime.Traditionally,afactorofsafetyisalsointroducedsothatitiscommonpracticethroughouttheEuropeanmemberstatesforequipmenttobede-energizedormadesafeandforminerstobewithdrawnfromtheirworkplaceiftheatmosphericconditionsattainaspecificpercentageofthelowerexplosionlimit(LEL)ofmethane(firedamp)inairasdefinedbytherelevantnationallegislationofthememberstatesNOTEThecurrentlimitvaluesfordisconnectingequipmentandwithdrawingpersonnelaredifferentineachmemberstate.InthisEuropeanStandardtwohazardousconditionsarespecified[1]takingintoaccountthedefinitionsintheDirective94/9/EEC,i.e.-hazardouscondition2(potentiallyexplosiveatmosphere)rangebetween0%andbelowLELoraboveUELupto100%offiredampinair-hazardouscondition1(explosiveatmosphere)rangebetweenLELandUELoffiredampinairSIST EN 1127-2:2002
EN1127-2:2002(E)7Inmineworkingswithhazardouscondition1,onlyM1equipmentisallowedtobeusedasithasahighdegreeofintrinsicsafety.M1equipment,e.g.telephonesorgasmeasuringequipment,maycontinuetobeoperatedevenintheeventofrareequipmentfaultsinexplosiveatmospheres.Thisisensuredbytheexistenceoftwoindependentprotectivemeasuresordoublefail-safesystems.Inmineworkingswithhazardouscondition2,bothM1andM2equipmentmaybeused.M2equipmentmaybeusedasithasahighdegreeofsafetyandissuitableforthesevereconditionsinmining.Inanexplosiveatmosphere,M2equipmentshallbecapableofbeingdisconnectedormadesafeNOTEUnderspecialconditions,itmaybenecessarytooperateM2equipmentinanexplosiveatmosphereforashorttime,e.g.whenpersonnelareescapingfrommineworkingswithhighfiredampreadingswiththeirM2caplightsswitchedon,whenpersonnelarebeingrecoveredbytheminerescueserviceorthefiredampextractionsystemhasbeenstartedupM1andM2equipmentcanonlybeoperatedwiththecharacteristicsspecifiedbythemanufacturerasonlythendotheyensuretherelevantlevelofsafety.Themanufacturerspecifiestheoperatingcharacteristicsfortheequipment.Inpractice,nationalregulationsrequirethatgasmeasurementsbetakenatcertainpointsandatspecificintervalsandsuitablemeasuresaretakentode-energizetheequipmenteithermanuallyorautomaticallyifthefiredampconcentrationreachesacertainvalue.Asubdivisionintohazardscausedbyanexplosivegasatmosphereandthosecausedbyanexplosivedustatmosphereis,incontrasttoEN1127-1:1997,notadvisableinundergroundminingasthehazardtothemineworkingscanbecausedsimultaneouslybyfiredampandbycloudsofflammabledust.Therefore,theexplosionprotectionmeasuresshallalwayscoverboth,i.e.thehazardcausedbyfiredampandtheonecausedbyflammabledust.Directive94/9/EECextendsthedefinitionofpotentiallyexplosiveatmospheretoincludeflammabledustaswellasfiredamp.Extensiveresearch[2]hasshownthattheminimumignitionenergy(MIE)ofcoaldust/airmixturesisseveralhundredtimesthatoffiredamp/airmixturesandthatthemaximumexperimentalsafegap(MESG)ofcoaldustparticlesismorethandoublethatforfiredamp.Itisthereforereasonabletoassumethattheequipment,protectivesystemsandcomponentswhicharedesignedandconstructedforuseinfiredamp/airmixturesarealsosuitableforuseincoaldust/airmixtures.Thecomparisonoffiredampandcoaldustexperimentaldatarelatesonlytoatmospheres.Additionalprecautionsarerequiredwhenconsideringcoaldustdepositsas,inthiscase,themaximumsurfacetemperatureoftheequipment(limitedto150°CforGroupIequipment)onwhichthedepositscanformcanbelimitedtovaluesbelowtheminimumignitiontemperature.Itshallbeborneinmindthatincoalminesandnon-coalminestherecanbeareaswherefiredampdoesnotoccurbutwherethereisariskofexplosionbecauseofflammabledust.AlistofstandardsunderpreparationbyCEN/TC305isgiveninannexC.1ScopeThisEuropeanStandardgivesgeneralguidelinesforexplosionpreventionandprotectioninminingbyoutliningthebasicconceptsandmethodologyforthedesignandconstructionofequipment,protectivesystemsandcomponents.ThisEuropeanStandardappliestoGroupIequipment,protectivesystemsandcomponentsintendedforuseinundergroundpartsofminesandthosepartsoftheirsurfaceinstallationsatriskfromfiredampand/orflammabledust.NOTEDetailedinformationonspecificequipment,protectivesystemsandcomponentsiscontainedintherelevantindividualstandards.Safety-relevantdataregardingflammablematerialsandexplosiveatmospheresarerequiredforthedesignandconstructionoftheexplosionprotectionmeasuresThisEuropeanStandardspecifiesmethodsfortheidentificationandassessmentofhazardoussituationsthatmayleadtoexplosionsanddescribesthedesignandconstructionmeasuresappropriatefortherequiredsafety.Thisisachievedby-hazardidentification;SIST EN 1127-2:2002
EN1127-2:2002(E)8-riskassessment;-eliminationorminimizationofrisk;-informationforuse.Thesafetyofequipment,protectivesystems,andcomponentscanbeachieved,asdescribedinEN292-2:1991,byremovalofhazardsand/orlimitingtherisk,i.e.a)byriskreductionbydesign;b)bysafeguarding;c)byinformationforuse;d)byadditionalprecautions.NOTERiskreductionbydesigninaccordancewithclause3ofEN292-2:1991shouldnotbeconfusedwiththeconceptof"design"asdescribedin6.5ofthisstandard.Measuresinaccordancewitha)(prevention)andb)(protection)againstexplosionsaredealtwithinclause6ofthisstandard,measuresaccordingtoc)againstexplosionsaredealtwithinclause7ofthisstandard.Measuresinaccordancewithd)arenotdescribedinthisEuropeanStandard.Theyaredealtwithinclause6ofEN292-2:1991.ThepreventiveandprotectivemeasuresdescribedinthisEuropeanStandardwillnotprovidetherequiredlevelofsafetyunlesstheequipment,protectivesystemsandcomponentsareoperatedinlinewiththeirintendeduseandareinstalledandmaintainedaccordingtotherelevantcodesofpracticeorrequirements.Thisstandardisapplicabletoanyequipment,protectivesystemsandcomponentsintendedtobeusedinpotentiallyexplosiveatmospheres.Theseatmospherescanarisefromflammablematerialsprocessed,usedorreleasedbytheequipment,protectivesystemsandcomponentsorfrommaterialsinthevicinityoftheequipment,protectivesystemsandcomponentsand/orfromthematerialsofconstructionoftheequipment,protectivesystemsandcomponents.Asshotfiringcanreleasepotentiallyexplosiveatmospheres,thisstandardisalsoapplicabletotheequipmentusedforshotfiring,apartfromtheexplosivesanddetonators.Thisstandardisapplicabletoequipment,protectivesystemsandcomponentsatallstagesofuse.Thisstandardisnotapplicableto:-medicaldevicesintendedforuseinamedicalenvironment;-equipment,protectivesystemsandcomponentswheretheexplosionhazardresultsexclusivelyfromthepresenceofexplosivesorunstablechemicalsubstances;-equipment,protectivesystemsandcomponentswheretheexplosioncanresultfromreactionofsubstanceswithoxidizingagentsotherthanatmosphericoxygenorbyotherhazardousreactionsorconditionsotherthanatmosphericconditions;-equipmentintendedforuseindomesticandnon-commercialenvironmentswhereexplosiveatmospheresmayonlyrarelybecreatedandsolelyasaresultoftheaccidentalleakageoffuelgas;-personalprotectiveequipmentwithinthemeaningofDirective89/686/EEC;-thedesignandconstructionofsystemscontainingdesired,controlledcombustionprocesses,unlesstheycanactasignitionsourcesinpotentiallyexplosiveatmospheres;-mineswherefiredampand/orflammabledustarenotnaturallypresentandsurfaceinstallationssuchascoalpreparationplants,powerplants,cokeovenplantsetc.inwhichanexplosiveatmospherecanbepresent,butwhicharenotpartofacoalmine.ThesearecoveredbyEN1127-1:1997.SIST EN 1127-2:2002
EN1127-2:2002(E)92NormativereferencesThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthepublicationreferredtoapplies(includingamendments).EN292-1:1991,Safetyofmachinery-Basicconcepts,generalprinciplesfordesign-Part1:Basicterminology,methodologyEN292-2:1991,Safetyofmachinery-Basicconcepts,generalprinciplesfordesign-Part2:TechnicalprinciplesandspecificationsEN954-1,Safetyofmachinery-Safetyrelatedpartsofcontrolsystems-Part1:GeneralprinciplesfordesignEN1050,Safetyofmachinery-RiskassessmentEN1127-1:1997,Explosiveatmospheres-Explosionpreventionandprotection–Part1:BasicconceptsandmethodologyprEN13237-1:1998,Potentiallyexplosiveatmospheres-Explosionpreventionandprotection-Part1:TermsanddefinitionsforequipmentandprotectivesystemsintendedforuseinpotentiallyexplosiveatmospheresEN13463-1:2001,Non-electricalequipmentforpotentiallyexplosiveatmospheres-Part1:Basicmethodologyandrequirements.EN13478,Safetyofmachinery-Firepreventionandprotection.EN50014,Electricalapparatusforpotentiallyexplosiveatmospheres-GeneralrequirementsEN50016,Electricalapparatusforpotentiallyexplosiveatmospheres-Pressurizedapparatus"p"EN50017,Electricalapparatusforpotentiallyexplosiveatmospheres-Powderfilling"q"EN50018,Electricalapparatusforpotentiallyexplosiveatmospheres-Flameproofenclosure"d"EN50019,Electricalapparatusforpotentiallyexplosiveatmospheres-Increasedsafety"e"EN50020,Electricalapparatusforpotentiallyexplosiveatmospheres-Intrinsicsafety"i"EN50028,Electricalapparatusforpotentiallyexplosiveatmospheres-Encapsulation"m"EN50033,Electricalapparatusforpotentiallyexplosiveatmospheres-CaplightsforminessusceptibletofiredampEN50303,GroupI,categoryM1equipmentintendedtoremainfunctionalinatmospheresendangeredbyfiredampprEN61508(allparts),Functionalsafetyofelectrical/electronic/programmableelectronicsafety-relatedsystemsEN61779-1,Electricalapparatusforthedetectionandmeasurementofflammablegases-Part1:GeneralrequirementsandtestmethodsEN61779-2,Electricalapparatusforthedetectionandmeasurementofflammablegases-Part2:PerformancerequirementsforgroupIapparatusindicatingavolumefractionupto5%methaneinair(IEC61779-2:1998,modified)EN61779-3,Electricalapparatusforthedetectionandmeasurementofflammablegases-Part3:PerformancerequirementsforgroupIapparatusindicatingavolumefractionupto100%methaneinair(IEC61779-3:1998,modified)SIST EN 1127-2:2002
EN1127-2:2002(E)10EN61779-4,Electricalapparatusforthedetectionandmeasurementofflammablegases-Part4:PerformancerequirementsforgroupIIapparatusindicatingavolumefractionupto100%lowerexplosivelimit(IEC61779-4:1998,modified)EN61779-5,Electricalapparatusforthedetectionandmeasurementofflammablegases-Part5:PerformancerequirementsforgroupIIapparatusindicatingavolumefractionupto100%gas(IEC61779-5:1998,modified)CLC/R044-001,Safetyofmachinery–Guidanceandrecommendationsfortheavoidanceofhazardsduetostaticelectricity.3Terms,definitionsandabbreviatedtermsForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsaswellasabbreviatedtermsapplyinadditiontothetermsanddefinitionsofprEN13237-1.3.1firedampanypotentiallyexplosivemixtureofgasesoranyflammablegasnaturallyoccurringinamineNOTEAsfiredampconsistsmainlyofmethane,thetermsfiredampandmethaneareusedfrequentlyinminingpracticeassynonyms.3.2protectionagainstfiredampexplosionsexplosionpreventionandprotectioninun
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