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【英文标准名称】:StandardTestMethodforDeterminingGasPermeabilityCharacteristicsofPlasticFilmandSheeting
【原文标准名称】:测定塑料薄膜和薄片透气性能的标准试验方法
【标准号】:ASTMD1434-1982(2009)e1
【标准状态】:现行
【国别】:美国
【发布日期】:1982
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F02.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Gaspermeability;Gastransmissionrate(GTR);Homogeneity;Laminates(plastic);Manometricvisualdetermination;Permeability--gas;Permeance;Plastic-coatedfabrics;Plastic-coatedpaper/paperboard;Plasticsheetandfilm;Pressuretesting--packaging/co
【摘要】:Thesemeasurementsgivesemiquantitativeestimatesforthegastransmissionofsinglepuregasesthroughfilmandsheeting.Correlationofmeasuredvalueswithanygivenuse,suchaspackagedcontentsprotection,mustbedeterminedbyexperience.Thegastransmissionrateisaffectedbyconditionsnotspecificallyprovidedforinthesetests,suchasmoisturecontent(Note2),plasticizercontent,andnonhomogeneities.Thesetestsdonotincludeanyprovisionfortestingsealsthatmaybeinvolvedinpackagingapplications.Note28212;Thetestsarerunusinggaswith0%moisturechanges.Interlaboratorytestinghasrevealedthatpermeancesmeasuredbytheseproceduresexhibitastrongdependenceontheprocedurebeingused,aswellasonthelaboratoryperformingthetesting.Agreementwithothermethodsissometimespoorandmaybematerial-dependent.Thematerialsbeingtestedoftenaffectthebetween-laboratoryprecision.Thecausesofthesevariationsarenotknownatthistime.Itissuggestedthatthismethodnotbeusedforrefereepurposesunlesspurchaserandsellercanbothestablishthattheyaremeasuringthesamequantitytoamutuallyagreeduponlevelofprecision.Useofthepermeabilitycoefficient(involvingconversionofthegastransmissionratetoaunitthicknessbasis)isnotrecommendedunlessthethickness-to-transmissionraterelationshipisknownfrompreviousstudies.Eveninessentiallyhomogeneousstructures,variationsinmorphology(asindicated,forexample,bydensity)andthermalhistorymayinfluencepermeability.1.1Thistestmethodcoverstheestimationofthesteady-staterateoftransmissionofagasthroughplasticsintheformoffilm,sheeting,laminates,andplastic-coatedpapersorfabrics.Thistestmethodprovidesforthedeterminationof(1)gastransmissionrate(GTR),(2)permeance,and,inthecaseofhomogeneousmaterials,(3)permeability.1.2Twoproceduresareprovided:1.2.1ProcedureM8212;Manometric.1.2.2ProcedureV8212;Volumetric.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G33
【国际标准分类号】:
【页数】:13P.;A4
【正文语种】:英语


【英文标准名称】:Explosiveatmospheres—Part6:Equipmentprotectionbyoilimmersion“o”
【原文标准名称】:爆炸性环境.第6部分:油浸"o"型防护设备
【标准号】:BSEN60079-6-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2008-04-30
【实施或试行日期】:2008-04-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:环境;建筑规范;电缆密封装置;电缆入口;耐压强度;内容;定义;防护等级;电气的;电气元件;电气工程;电气安全;电驱动装置;外壳;设备;防爆;爆炸性环境;可燃性环境;检验;绝缘材料;绝缘件;作标记;材料;数学计算;油浸;防护电气设备;防电击;合格试验;安全;安全要求;短路周期;规范(验收);测试;o型防护电气设备;类型;电压
【英文主题词】:Atmosphere;Buildingspecifications;Cableglands;Cableinlet;Compressivestrength;Contents;Definition;Definitions;Degreesofprotection;Electrical;Electricalcomponents;Electricalengineering;Electricalsafety;Electrically-operateddevices;Enclosure;Enclosures;Equipment;Explosionprotection;Explosion-proof;Explosiveatmospheres;Flammableatmospheres;Inspection;Insulatingmaterials;Insulations;Marking;Materials;Mathematicalcalculations;Oilimmersion;Protectedelectricalequipment;Protectionagainstelectricshocks;Qualificationtests;Safety;Safetyrequirements;Short-circuitperiod;Specification(approval);Testing;Typeoprotectedelectricalequipment;Types;Voltage
【摘要】:ThispartofIEC60079specifiestherequirementsfortheconstructionandtestingofoilimmersedelectricalequipment,oil-immersedpartsofelectricalequipmentandExcomponentsinthetypeofprotectionoilimmersion"o",intendedforuseinexplosivegasatmospheres.NOTETypeofprotectionoilimmersion“o”providesequipmentprotectionlevel(EPL)Gb.Forfurtherinformation,seeAnnexA.ThisstandardsupplementsandmodifiesthegeneralrequirementsofIEC60079-0.WherearequirementofthisstandardconflictswitharequirementofIEC60079-0,therequirementofthisstandardtakesprecedence.Thisstandardisapplicabletoelectricalequipment,partsofelectricalequipment,andExcomponentswhich,intheabsenceofoilimmersion,arenotignitioncapableinnormaloperationasdeterminedbyIEC60079-15orIEC60079-11.
【中国标准分类号】:K35
【国际标准分类号】:29_260_20
【页数】:22P.;A4
【正文语种】:英语