1、BRITISH STANDARD BS EN 13274-8:2002 Respiratory protective devices Methods for test Part 8: Determination of dolomite dust clogging The European Standard EN 13274-8:2002 has the status of a British Standard ICS 13.340.30 BS EN 13274-8:2002 This British Standard, having been prepared under the direct
2、ion of the Health and Environment Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 6 January 2003 BSI 6 January 2003 ISBN 0 580 41076 5 National foreword This British Standard is the official English language version of EN 1327
3、4-8:2002. The UK participation in its preparation was entrusted by Technical Committee PH/4, Respiratory protection, to Subcommittee PH/4/9, Test methods and interpretation, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its se
4、cretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Cat
5、alogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand
6、 the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a f
7、ront cover, an inside front cover, the EN title page, pages 2 to 16, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPIS
8、CHENORM EN132748 December2002 ICS13.340.30 Englishversion RespiratoryprotectivedevicesMethodsoftestPart8: Determinationofdolomitedustclogging AppareilsdeprotectionrespiratoireMthodesdessai Partie8:Dterminationducolmatageparlapoussirede dolomie AtemschutzgertePrfverfahrenTeil8:Bestimmungdes Einspeich
9、ernsvonDolomitstaub ThisEuropeanStandardwasapprovedbyCENon23October2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchn
10、ational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatus
11、asthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMAL
12、ISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN132748:2002EEN132748:2002(E) 2 Contents page Foreword3 Introduction .4 1 Scope 4 2 Normativereferences 4 3 Termsan
13、ddefinitions. .4 4 Prerequisites .4 5 Generaltestrequirements . .5 6 Samplepreparation .5 7 Testmethods 5 7.1 Principle5 7.2 Apparatus .5 7.3 Testconditions . .5 7.4 Procedures .6 7.4.1 General6 7.4.2 ProcedureAContinuousflow . .6 7.4.3 ProcedureBSinusoidalflow(ambientexhaledair). 6 7.4.4 ProcedureC
14、Sinusoidalflow(conditionedexhaledair) . .7 AnnexA (informative) TestresultsUncertaintyofmeasurement 15 AnnexZA (informative) ClausesofthisEuropeanStandardaddressingessentialrequirementsor otherprovisionsofEUDirectives 16EN132748:2002(E) 3 Foreword Thisdocument(EN132748:2002)hasbeenpreparedbyTechnica
15、lCommitteeCEN/TC79“Respiratoryprotective devices”,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJune2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby June2003. Thisdocum
16、enthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropean FreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s). ForrelationshipwithEUDirective(s),seeinformativeAnnexZA,whichisanintegralpartofthisdocument. Itisoneofseveralparts,whichareasfollows: Part1:Determinat
17、ionofinwardleakageandtotalinwardleakage Part2:Practicalperformancetests Part3:Determinationofbreathingresistance Part4:Flametests Part5:Climaticconditions Part6:Determinationofcarbondioxidecontentoftheinhalationair Part7:Determinationofparticlefilterpenetration Part8:Determinationofdolomitedustclogg
18、ing AnnexAisinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portug
19、al,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN132748:2002(E) 4 Introduction ThisEuropeanStandardisintendedasasupplementtothespecificdevicestandardsforrespiratoryprotectivedevices. Testmethodsarespecifiedforcompleteorpartsofdevices.IfdeviationsfromthetestmethodgiveninthisEuropean Standardareneces
20、sary,thesedeviationswillbespecifiedintherelevantdevicestandard. 1Scope ThisEuropeanStandardspecifiestheprocedurefordeterminationofdolomitedustcloggingforrespiratory protectivedevices. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.The
21、se normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicat
22、ionreferredtoapplies(includingamendments). EN132, RespiratoryprotectivedevicesDefinitionsoftermsandpictograms. 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN132apply. 4Prerequisites InordertoimplementthisPartofEN13274,atleastthefollowingparametersneedtobes
23、pecifiedintherelevant devicestandard: numberofsamples(includingprefiltersifappropriate); mechanical conditioning; climatic conditioning; samplepreparation; detailsofsamplemountingintestchamber(e.g.orientation,adapter,dummyhead); informationaboutthestateofthedevicebeforestartingthetest(e.g.filter,bat
24、teryofapowereddevice); whichtestprocedure(A,B,C); dustexposure; nominalairflow(ifapplicable,e.g.formultiplefilters); breathingrate; temperatureandhumidityofthebreathingair;EN132748:2002(E) 5 pass/fail criteria. 5 Generaltestrequirements Unlessotherwisespecifiedthevaluesstatedinthisstandardareexpress
25、edasnominalvalues.Exceptfor temperaturelimits,valueswhicharenotstatedasmaximaorminimashallbesubjecttoatoleranceof5%. Unlessotherwisespecifiedtheambienttemperaturefortestingshallbefrom16Cto32Candthetemperature limitsshallbesubjecttoanaccuracyof1C. 6 Samplepreparation Beforecarryingoutthetest,examinet
26、hedevicetoseethatitisintheconditionrequiredbytherelevantdevice standard.Ifappropriate,chooseasuitableadaptorandcheckthatthedevicecanbefittedtoit.Ifnecessary, comparethebreathingresistancewithandwithouttheadaptor. 7Test methods 7.1Principle Thetestconsistsofdrawingdustladenairthroughthefilteringdevic
27、eandtest(e.g.filter,filteringfacepiece, powereddevice)untileither: a) aspecifiedbreathingresistanceisreached,or: b) aspecifieddustexposureisreached. 7.2Apparatus Chooseasuitablemountingforthedevice,whichshallbeeitheranadaptororadummyhead.Ifappropriate, checkthatthefitofthedeviceonthemountingisleakti
28、ght.Inallcases,thepressuredropintroducedbythe mountinghastobeconsideredinresults. AtypicalarrangementofthetestequipmentisshowninFigure1.Therecommendeddusttestchamberusedisshown inFigure2.Theworkingareaofthischamberhasasquaresectionof650mmx650mm.Awindowallowsthedevice tobeintroducedintothechamber.The
29、linearspeedandtheparticlesizedistribution(seeFigure3)areessential parametersofthetest,andshallbeverifiedifthegeometryofthedusttestchamberdiffersfromthatdescribedhere andinFigure2. NOTEAnAndersenCascadeimpactorhasbeenfoundtobeasuitablemeansofmeasuringparticlesizedistributionofthe airbornedolomitedust
30、.InformationonthisequipmentcanbeobtainedfromtheSecretariatofCEN/TC79. 7.3Test conditions Thetestagentisdolomitedustdispersedinaflowofair.Itshallnotberecirculatedorreused. NOTEInformationaboutthesupplierofdolomitedust,DRB4/15)canbeobtainedfromtheSecretariatofCEN/TC79. Thetestagentistotallydispersedin
31、acontinuousairflow,toachievealinearspeedof4cm/sattheworkingarea.This correspondstoanairflowrateof60m 3 /hthroughthedustchambershowninFigure2.Theairborneparticlesize distributionisshowninFigure3. Theairbornedustconcentrationmaybemeasuredbydrawingairat2l/minthroughasamplingprobeequipped withapreweighe
32、d,highefficiencyfilter(openfacediameter37mm)locatednearthetestsample. Theclimaticconditionswithintheworkingareaforthedurationofthetestshallbe(21to25)Cand(30to60)%RH.EN132748:2002(E) 6 7.4Procedures 7.4.1General Threeprocedures(A,B,andC)aregiven,theirselectionbeingdependentonthetypeofdevicetobetested
33、. NOTEProcedureAistypicallyusedforfilters,procedureBistypicallyusedforpowerassisteddevicesandprocedureCis typicallyusedforfilteringfacepieces. 7.4.2 ProcedureAContinuousflow Thedeviceismountedonasuitableadaptorandconnectedtoapumpwhichwilldrawacontinuousairflowthrough thefilterduringthetest.SeeFigure
34、4. Positionthedevicesothat,wherepossible,theinletsurfaceofthefilter(s)liesparalleltotheairflowthroughthe testchamber. Checkthepressuredropoftheadaptorattherequiredairflow,byrecordingthechangeinpressureorbysettinga newzero. Generatetheaerosolforatleast5minbeforeperformingthetest,inordertoensurethatth
35、eaerosolishomogeneous andthedustconcentrationisconstantbeforethetestisstarted. Passthecontinuousairflowattherategivenintheprerequisitesthroughthedeviceundertestandcontinually monitorthebreathingresistance.Continueuntiltherelevantlimit,eitherbreathingresistanceorcalculatedtesting time,isreached.Calcu
36、latethetestingtimefromtheratiobetweentherequireddustexposureandthemeasured dustconcentration. NOTEForexample,adustexposureat263mgh/m 3 givesatestingtimeof39,5minwithadustconcentrationof 400mg/m 3 . Stopthepumpandcarefullyremovethedevicefromthedusttestchamber.Recordtheamountofdustdepositedat thespeci
37、fiedpressuredrop,orviceversa. 7.4.3 ProcedureBSinusoidalflow(ambientexhaledair) Thedeviceisconnectedtoabreathingsimulatorwhichinhalesandexhalesairatambientconditions.SeeFigures5 and6. Positionthedevicesothat,wherepossible,theinletsurfaceofthefilter(s)liesparalleltotheairflowthroughthe testchamber. D
38、ependingonthedesignofthedevice,placeiteither: a) withthefacepiecefittedtothedummyhead,andthenthewholedeviceplacedinthedusttestchamber(see Figure5); b) withthefacepiecefittedtothedummyheadoutsidethetestchamber,andtheairinlettothedevicelocated insidethedusttestchamber(seeFigure6). Inbothcases,fitthefa
39、cepiecetothedummyhead. Generatetheaerosolforatleast5minbeforeperformingthetest,inordertoensurethattheaerosolishomogeneous andthedustconcentrationisconstantbeforethetestisstarted. Switchontheblowerunitofthedevice(iffitted).Setandoperatethebreathingsimulatorattherequiredrateand volumeuntilthecalculate
40、dtestingtimeisreached. NOTEForexample,adustexposureat200mgh/m 3 givesatestingtimeof30minwithadustconcentrationof400mg/m 3 .EN132748:2002(E) 7 Stopthebreathingsimulatorandswitchofftheblowerunit(iffitted).Carefullyremovethedevice. 7.4.4 ProcedureCSinusoidalflow(conditionedexhaledair) Thedeviceisconnec
41、tedtoabreathingsimulator,whichinhalesairatambientconditionsandexhaleshumidifiedand heatedair.SeeFigure7. Positionthedevicesothat,wherepossible,theinletsurfaceofthefilter(s)liesparalleltotheairflowthroughthe testchamber. Placethedevice,fittedandsealedonaSheffielddummyhead,totallyinthedusttestchamber.
42、Operatethebreathing simulatorattherequiredrateuntiltherelevantlimit(breathingresistanceorcalculatedtestingtime)isreac hed, ensuringthebreathingairconditionsatthemouthofthedummyheadareasspecifiedbytheprerequisites. NOTEForexample,adustexposureat833mgh/m 3 givesatestingtimeof125minwithadustconcentrati
43、onof 400mg/m 3 . Generatetheaerosolforatleast5minbeforeperformingthetest,inordertoensurethattheaerosolishomogeneous andthedustconcentrationisconstantbeforethetestisstarted. Stopthebreathingsimulatorandcarefullyremovethedevice.EN132748:2002(E) 8 Key 1 Compressedair 6 Flowmeter 2Air filter 7 Pump 3Injector 8 Exhaust 4 Dusttestchamber 9 Dustdistributor 5 Filter 10 Dustpickuppoint 11 Directionofairflow Figure1
