GMW3221

TestMethodMaterialsGMW3221ProcedureforStandardConditioningofOrganicMaterials1ScopeThisdocumentdescribesthegeneralproceduretobeusedforstandardconditioningoforganicmaterialtestspecimens.Theconditioningofthesematerialsatstandardtem-peratureandhumidityconditionswillaidinobtainingrepeatableandcomparabletestresults.Note:Nothinginthistestmethodsupersedesappli-cablelawsandregulationsunlessaspecificexemp-tionhasbeenobtained.Note:IntheeventofaconflictbetweentheEng-lishandthedomesticlanguage,theEnglishlanguageshalltakeprecedence.2References2.1Normative.None.2.2GM.GMI60300HN00223TestEquipment3.1TemperatureControllingEquipment.Heatingand/orcoolingequipmentwithaircirculationcapableofmaintaininganenvironmentatatemperatureof(+22±3)C.3.2HumidityControllingEquipment.Humidifyingequipment,ifrequiredwiththeabilityofmaintaininganenvironmentattherelativehumidity(RH)require-mentsbasedonthefollowingcoding.CodeA(50±5)%RHCodeB(50±10)%RHCodeC(65±10)%RHCodeDNoRHcontrolormeasurementTheappropriatecodeshallbereferencedintheappli-cableMaterialSpecificationorTestMethod.3.3Oven.Aircirculatingoven.4TestMaterialNotapplicable.5TestMethod5.1SummaryofTestMethod.Organicmaterialtestspecimensaremaintainedinanenvironmentataspecifiedtemperatureandrelativehumidityforaspe-cificperiodtoachieveastateofequilibriumimmedi-atelypriortoconductingcertaintests.Thiswillaidinobtainingtestresultsthatarerepeatableandcompa-rable.5.2TestSamplePreparation.5.2.1Pre-drymaterialswithhygroscopiccharacteris-tics,suchaspolyamides,polyurethanes,wool,cottonorfiberboard,inanovenuntilanapproximatelycon-stantweightisachieved.5.2.2Allothermaterialsdonotrequirepre-drying.5.3TestProcedure.5.3.1Conditionorganicmaterialtestspecimensforatleast24hoursinanenvironmenthavingatempera-tureof(+22±3)Candarelativehumidityasspec-ifiedbytheappropriatecode(paragraph3.2),refer-encedintheapplicableMaterialSpecificationorTestMethod.5.3.2Testspecimensormaterialsamplestobeusedtoproducetestspecimensshallbepositionedintheconditioningenvironmentsuchthat,whereverpossi-ble,allmaterialfacesareexposedtotheconditioningatmosphere.Itispreferablethatsmallsamples/spec-imensshallbefreelysuspendedinthearea,andthatlargersamples/specimensbesupportedonawirerack.Ifaconditioningcabinetisused,samplesshallalsobeevenlydistributedinsidethecabinet.Duringtheconditioningperiod,frequentdisturbanceoftheconditioningenvironmentshallbeavoided.Testingshallbeconductedintheconditionedenvironmentorimmediately(£5minutes)afterremovalfromthecon-ditionedenvironment.6EvaluationandRatingNotapplicable.7Report7.1DeviationsfromthisTestMethod.DeviationsfromtheconditionsofthisTestMethodshallhave©Copyright2000GeneralMotorsCorporationAllRightsReservedOriginatingDepartment:NorthAmericanEngineeringStandards,RecordsandDocumentationDecember2000Page1of2GMW3221GMWORLDWIDEENGINEERINGSTANDARDSbeenagreeduponbetweensupplierandvehicleman-ufacturer.Alldeviationsshallbespecifiedonthecom-ponentdrawings,materialspecifications,etc.andshallbeindicatedontestcertificates,reportsetc.8SafetyThismethodmayinvolvehazardousmaterials,opera-tionsandequipment.Thismethoddoesnotproposetoaddressallthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthismethodtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimita-tionspriortouse.9CodingSystemThistestmethodshallbereferencedinotherdocu-ments,drawings,VTS,CTS,etc.asfollows:Example:TesttoGMW3221CodeAWhereGMW=ValidationArea(GMWorldwide)3221=ContinuousNumberCodeA=RelativeHumidityCode(Paragraph3.2)10ReleaseandRevisions10.1Release.ThisspecificationwasfirstapprovedinAUG2000andpublishedinDEC2000.ThisdocumentwaswrittenbytheWorldwideFab-ricSpecificationTeamtomakecommonthediffer-entstandardconditionsusedwithinGM.TheseareGMI60300(GME,GMB,SaabAutomobile,Holden,IsuzuMotorsandDeltaMotor),HN0022(Holden)andallNAMaterialSpecifications(NA).©Copyright2000GeneralMotorsCorporationAllRightsReservedPage2of2December2000