【英文标准名称】:StandardTestMethodforWaterSeparationPropertiesofLightandMiddleDistillate,andCompressionandSparkIgnitionFuels
【原文标准名称】:轻质和中间馏出的压燃及火花点火发动机油水分离性试验方法
【标准号】:ASTMD7451-2008a
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D02.14
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:compressionignitionfuel;demulsibility;dieselfuel;emulsionforming;fuelcontaminants;fuelwaterinterface;gasoline;lightdistillatefuel;middledistillatefuel;non-aviationfuel;sparkignitionfuel;surfactants;waterseparation;water-soluble
【摘要】:Theprimaryuseofthistestmethodistoevaluatenewadditivepackagesinspecificfuelstoensurethatfuel-waterseparabilitywillnotbecompromisedbytheuseoftheadditivepackage,eitherattheirnormaltreatratesoratseveraltimestheintendedtreatratetoevaluatetheimpactofpotentialovertreatment.WaterVolumeChanges8212;Usingthistechniquerevealthepresenceofwater-solublecomponents,suchasalcohols,inthefuel.InterfaceConditionRatings8212;Usingthistechniquerevealthepresenceofpartiallysolublecomponents,suchassurfactants,inthefuel.Additivesorcontaminantsthataffecttheinterfacecouldharmwaterseparationpropertiesoffuelsinequipmentandquicklyinhibitthefreeflowoffuelthroughfiltersandinjectionequipment,causingadecreaseincombustionperformance.1.1Thistestmethodcoverstheevaluationofthetendencyofwaterandfuelswithafinalboilingpointoflessthan390x00B0;C,asmeasuredinTestMethodD86,toseparatecleanlyratherthancreateemulsionswhentheymaycontainpotentialemulsionformingadditivesorcomponents,orhavebeenadditizedwithpotentialemulsionformingadditives,orcomponents.1.2Thistestmethodappliesprimarilytogasoline,diesel,kerosine,anddistillategradesofgasturbine,marine,homeheatingoilsandfurnacefuels(seeSpecificationsD396,D975,D2880,D3699,D4814,andD6985).Forfuelcomponentssuchasbiodieseloralcohol,refertoX1.2andX1.3.1.3Thistestmethodisnotmeanttocertifyorqualifyfuelsforsale,butitisintendedforusebyadditivesupplierstodeterminetheneedfordemulsifiercomponentsintheiradditivepackages.1.4Thistestmethodisnotmeantfortestingoffuelscontaininglargeamountsofaqueoussolublecomponents,suchasE85,orfortestingofwateremulsifiedfuels,orfortestingofaviationfuels.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E34
【国际标准分类号】:75_160_20
【页数】:5P.;A4
【正文语种】:英语


【英文标准名称】:Connectorssetsandinterconnectcomponentstobeusedinopticalfibrecommunicationsystems.Productspecifications.Connectorsetsandinterconnectcomponentstobeusedinopticalfibrecommunicationsystems.Productspecifications.TypeECterminated
【原文标准名称】:光纤通信系统中使用的连接器组和互连元件.产品规范.端接在IEC60793-2类B.1.1单模纤维上的EC型连接器组和互连元件
【标准号】:BSEN50377-5-1-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-04-03
【实施或试行日期】:2003-04-03
【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】:适配器;电缆;通信系统;连接工艺;连接;数据连接系统;详细规范;尺寸规格;电插头;电气工程;紧固件;玻璃纤维电缆;标志;单模纤维;光波导;工作性能;插头;产品规格;产品标准;单光纤电缆;规范(验收);测试;测试要求;类型
【英文主题词】:Adapters;Cables;Communicationsystems;Connectiontechnology;Connections;Datalinksystem;Detailspecification;Dimensions;Electricplugs;Electricalengineering;Fasteners;Glassfibrecables;Marking;Monomodefibres;Opticalwaveguides;Performanceinservice;Plugs;Productspecification;Productstandards;Singlefibreopticalcables;Specification(approval);Testing;Testingrequirements;Types
【摘要】:1ProductdefinitionThisstandardcontainstheinitial,startoflifedimensional,optical,mechanicalandenvironmentalperformancerequirementswhichaterminatedandassembledsinglemodeECconnectorset(plugadapterplug)mustmeetinorderforittobecategorisedasanENproductspecification.Sincedifferentvariantsandgradesofperformancearepermitted,productmarkingdetailsaregivenin3.5.2IntermateabilityAllproductsconformingtotherequirementsofthisstandardwillintermate,theresultinglevelofrandomattenuationperformancewillonlybeensuredinaccordancewithTable1.Theintentionisthatthiswillbetrueirrespectiveofthemanufacturingsource(s)oftheproduct.Inallcases,theintermatingofplugvariantshavingdifferentattenuationgradeswillresultinanuncertainlevelofrandomattenuationperformance.Similarly,theintermatingofplugvariantswithsuffixA,withplugvariantswithsuffixC,willresultinanuncertainlevelofrandomattenuationperformance.3OperatingenvironmentThetestsselectedcombinedwiththeseveritiesanddurationsarerepresentativeofanexternalweatherprotectedenvironmentdefinedby-ES200671:externalweatherprotectedenvironmentdefinedbyETS300019-f-3classes3.3;3.4and3.5-EN61753-2-1categoryU:uncontrolledenvironment.4ReliabilityWhilsttheanticipatedservicelifeexpectancyoftheproductinthisenvironmentis20years,compliancewiththisstandarddoesnotguaranteethereliabilityoftheproduct.Thisshouldbepredictedusingarecognisedreliabilityassessmentprogramme.5QualityassuranceCompliancewiththisstandarddoesnotguaranteethemanufacturingconsistencyoftheproduct.Thisshouldbemaintainedusingarecognisedqualityassuranceprogramme.
【中国标准分类号】:M33
【国际标准分类号】:33_180_20
【页数】:30P.;A4
【正文语种】:英语