TEB-APR-STP-0007

UncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyApprovals:FirstLevelSecondLevelThirdLevelFourthLevelNationalInstituteforOccupationalSafetyandHealthNationalPersonalProtectiveTechnologyLaboratoryP.O.Box18070Pittsburgh,PA15236ProcedureNo.TEB-APR-STP-0007Revision:2.1Date:19September2012DETERMINATIONOFINHALATIONRESISTANCETEST,AIR-PURIFYINGRESPIRATORSSTANDARDTESTINGPROCEDURE(STP)1.PURPOSEThistestestablishestheprocedureforensuringthattheinhalationbreathingresistanceofchemicalcartridgerespirators,particulaterespirators,gasmasks,andtightfittingpoweredair-purifyingrespiratorssubmittedforApproval,ExtensionofApproval,orexaminedduringCertifiedProductAudits,meetstheminimuminhalationresistancerequirementssetforthin42CFR,Part84,SubpartI,Section84.122,SubpartK,Section84.180,SubpartL,Section84.203SubpartKK,Section84.1149,Section84.1156(a)(1)(2),theStatementofStandardforChemical,Biological,RadiologicalandNuclear(CBRN)Full-FacepieceAir-PurifyingRespirator(APR)Revision2dated4-4-2003,andtheStatementofStandardforChemical,Biological,RadiologicalandNuclear(CBRN)Air-PurifyingEscapeRespirator(APER)dated9-30-2003.2.GENERALThisSTPdescribestheDeterminationofInhalationResistanceTest,Air-PurifyingRespiratorstestinsufficientdetailthatapersonknowledgeableintheappropriatetechnicalfieldcanselectequipmentwiththenecessaryresolution,conductthetest,anddeterminewhetherornottheproductpassesthetest.3.EQUIPMENT/MATERIAL3.1.Thelistofnecessarytestequipmentandmaterialsfollows:3.1.1.Ananthropometricheadformorfixtureonwhichtomountthecompleterespiratorassemblyintheconfigurationaswornbytheuser.Inaddition,fixturesarerequiredformountingacanisteronlywhentestingfullfacepieceAPRforCBRN,andfortestingmouthpiecerespirators.3.1.2.Ameansofconnectingtheheadformortestfixturetotheresistancetester.Therespiratormustbefittedtotheheadform/fixturewithnoleaks.3.1.3.Resistancetesterconsistingofavacuumsourcecapableofdelivering85litersperminute(lpm),a6-inchslantmanometerininchesofwaterincrements,withaconnectionportforthetestfixturewithmountedrespirator.Theresistancetestercurrentlybeingusedislocatedonthefrontpanelofthesilicadustchamber.UncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyProcedureNo.TEB-APR-STP-0007Revision:2.1Date:19September2012Page2of113.1.4.AmericanMeterCo.DryTestMeterModelDTM-325.3.1.5.Ropecaulk,gluegunwithhotmeltglueandbeeswaxifneeded.3.1.6.Heatingplate,beaker,andsmallbrushifneeded.4.TESTINGREQUIREMENTSANDCONDITIONS4.1.Priortobeginninganytesting,allmeasuringequipmenttobeusedmusthavebeencalibratedinaccordancewiththetestinglaboratory’scalibrationprocedureandschedule.AllmeasuringequipmentutilizedforthistestingmusthavebeencalibratedusingamethodtraceabletotheNationalInstituteofStandardsandTechnology(NIST)whenavailable.4.2.AnylaboratoryusingthisproceduretosupplycertificationtestdataasacontractortoNIOSHwillbesubjecttotheprovisionsoftheNIOSHSupplierQualificationProgram(SQP).ThisprogramisbasedonthetenetsofISO/IEC17025,theNIOSHManualofAnalyticalMethodsandotherNIOSHguidelines.Aninitialcompletequalitysystemauditandfollowonauditsarerequirementsoftheprogram.AdditionaldetailsoftheProgramanditsrequirementscanbeobtaineddirectlyfromtheInstitute.**Note4.2doesnotapplytoPretestdatafromapplicantsasrequiredunder42CFR84.64.4.3.Precisionandaccuracy(P&A)mustbedeterminedforeachinstrumentinaccordancewithlaboratoryproceduresandNIOSH/NPPTLguidance.Soundpracticerequires,underNIOSHManualofAnalyticalMethods,demonstratingatolerancerangeofexpecteddataperformanceofaplusorminus25%ofa95%confidenceintervalofthestatedstandardrequirement.NIOSH/NPPTLP&Atolerancecanbehigherbutnotlower.4.4.Theprecisionandaccuracyofthismethodwasdeterminedbymeasuringtheinhalationresistanceof3samplesofthesamemakeandmodelrespirator.Eachsamplewastested6times.Theentireprocedurewasrepeatedfrombeginningtoendforeachreading.Theresultsareshowninthetablebelow.Sample123Mean27.56mmH2O28.24mmH2O27.81mmH2OStd.Dev.0.270.300.354.5.Normallaboratorysafetypracticesmustbeobserved.ThisincludessafetyprecautionsdescribedinthecurrentNIOSHPittsburghHealthandSafetyProgram.4.6.Therearenounusualorspecialsafetyprecautionsnecessaryforthistestprocedure.UncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyUncontrolledCopyProcedureNo.TEB-APR-STP-0007Revision:2.1Date:19September2012Page3of115.PROCEDURENote:ReferenceSection3forequipment,modelnumbersandmanufacturers.Forcalibrationpurposesusetheproceduresdescribedinthemanufacturer'soperationandmaintenancemanuals.5.1.Followindividualinstructionmanualsforsetupandmaintenanceofequipmentusedinthisprocedurepriortobeginninganytesting.Malfunctioningequipmentmustberepairedorreplacedandproperlysetupandcalibratedbeforestartingalltests.5.2.Turnonresistancetesterandadjustvacuumto6.2in.ofmercury.5.3.Adjustnegativeairflowto85lpmtocalibratedmarkontheverticalinhalationresistanceairflowmanometer.Thisairflowshallb