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【英文标准名称】:StandardTestMethodforMeasuringtheInsulationResistanceofMineral-Insulated,Metal-SheathedThermocouplesandThermocoupleCableatRoomTemperature
【原文标准名称】:测量室温时绝缘矿物、铠装金属热电偶和热电偶电缆绝缘电阻的标准试验方法
【标准号】:ASTME780-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:E20.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:环境温度;绝缘电阻;材料;测量技术;温度测量;热电偶
【英文主题词】:insulationresistance;mineral-insulated,metal-sheathedthermocouplecableinsulationresistance;mineral-insulated,metal-sheathedthermocoupleinsulationresistance
【摘要】:Thermocouplesfabricatedfromthermocouplecablethathasbeencontaminatedbymoistureorbyotherimpuritiesmayundergolargechangesinthermoelectricpropertiesormayfailcatastrophicallywhenexposedtohightemperatures.Sincesuchcontaminationusuallylowerstheelectricalresistancebetweenthethermoelementsandthesheathsubstantially,measurementoftheinsulationresistancecanprovideavaluablecheckofinsulationqualityandcleanliness,andcanserveasabasisforrejectionofunsuitablematerialandunreliablecomponents.Formanufacturersinparticular,lowelectricalinsulationresistancecanalsobeindicativeofdisplacedthermoelementsordefectsinthemetalsheathwhichwillrequirefurtherinvestigation,butallusersshouldbeawareofthesepotentialdefectswhenfacedwithanunacceptableinsulationresistancemeasurement.Thistestmethodisprimarilyintendedforusebymanufacturersandusersofmineral-insulated,metal-sheathedthermocouplesorthermocouplecablestoverifythatmeasuredvaluesofinsulationresistanceexceedspecifiedminimumvalues,suchasthoselistedinSpecificationsE235,E585/E585M,E608/E608M,andE2181/E2181M.Manufacturersandusersshouldbeaware,however,thatwhentheinsulationresistanceisgreaterthan1x00D7;108x2126;,disagreementbyanorderofmagnitudeintheresultsobtainedwiththistestmethodisnotunusual.Inaddition,usersofthistestmethodshouldappreciatethattheroomtemperatureinsulationresistanceofboththermocouplecablesandoffinishedthermocouplesmaychangeduringshipment,storage,anduse,particularlyiftheendsealsaredamagedordefective.Consequently,valuesofinsulationresistancedeterminedbythistestmethodmaynotnecessarilyberepeatable.1.1Thistestmethodprovidestheproceduresformeasuringtheroomtemperatureelectricalinsulationresistancebetweenthethermoelements,andbetweenthethermoelementsandthesheath,ofamineral-insulated,metal-sheathedthermocoupleorthermocouplecable.Itmaybeusedtomeasuretheinsulationresistanceofbulklengthsofthermocouplecablepreviouslysealedagainstmoistureintrusionortotestathermocouplehavinganungroundedclass2junction.Thismethodcannotbeusedtotestathermocouplehavingagroundedclass1junctionunlessthejunctionisremovedpriortotesting,afterwhichthethermocouplemaybedealtwithinthesamemannerasathermocouplecable.1.2ThistestmethodappliesprimarilytothermocouplecablesconformingtoSpecificationsE585/E585MandE2181/E2181MandtothermocouplesconformingtoSpecificationsE608/E608MandE2181/E2181M,butmayalsobeappliedtothermocouplesorthermocouplecablesthataresuitableforuseinair,whosesheathorthermoelementsarecomprisedofrefractorymetals,thataretestedinadryandchemicallyinertenvironment,andthatmayemploycompactedceramicinsulatingmaterialsotherthanmagnesia(MgO)oralumina(Al2O3).Usersofthistestmethodshouldnotethatspecificationsdealingwithcompactedceramicinsulatingmaterialsotherthanmagnesiaoralumina,whicharedescribedinSpecificationE1652,arenotcurrentlyavailable.Asaresult,acceptancecriteriamustbeagreeduponbetweenthecustomerandsupplieratthetimeofpurchase,oralternatively,judgmentandexperiencemustbeappliedinestablishingtestvoltagelevelsandacceptableinsulationresistancevaluesforthesetypesofthermocouplesandthermocouplecables.1.3Thistestmethodmaybeusedforthermocouplesorthermocouplecableshavinganoutsidediameterof0.5mm(0.020in)orlarger.1.4Usersofthistestmethodshouldbeawarethattheroomtemperaturei......
【中国标准分类号】:K15
【国际标准分类号】:17_200_20
【页数】:5P.;A4
【正文语种】:


【英文标准名称】:Ductileironpipes,fittings,accessoriesandtheirjointsforwaterpipelines-Requirementsandtestmethods;GermanversionEN545:2006
【原文标准名称】:水管用球墨铸铁管、配件、附件及其接头.要求和试验方法
【标准号】:DINEN545-2007
【标准状态】:作废
【国别】:德国
【发布日期】:2007-02
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:附件;铸铁管;铸铁;铸铁管道;覆层;定义;尺寸;配件;功能效率;功能可靠性;功能;内部覆层;作标记;机械性能;公称尺寸;管道配件;管道;管;管道工程系统;质量保证;规范(验收);球墨铸铁;表(数据);试验;输水管道;水常规;水常规(实验)
【英文主题词】:Accessories;Castironpipes;Cast-iron;Cast-ironpipe;Cast-ironpipelines;Coatings;Definitions;Dimensions;Fittings;Functionalefficiency;Functionalreliability;Functions;Internalcoatings;Marking;Mechanicalproperties;Nominalsize;Pipefittings;Pipelines;Pipes;Pipeworksystems;Qualityassurance;Specification(approval);Spheroidal-graphitecast-iron;Tables(data);Testing;Waterpipelines;Waterpractice
【摘要】:ThisEuropeanStandardspecifiestherequirementsandassociatedtestmethodsapplicabletoductileironpipes,fittings,accessoriesandtheirjointsfortheconstructionofpipelines:-toconveywater(e.g.potablewater);-withorwithoutpressure;-tobeinstalledbeloworaboveground.Thisstandardisapplicabletopipes,fittingsandaccessorieswhichare:-manufacturedwithsocketed,flangedorspigotends;-normallydeliveredexternallyandinternallycoated;-suitableforfluidtemperaturesbetween0℃and50℃,excludingfrost.Thisstandardcoverspipes,fittingsandaccessoriescastbyanytypeoffoundryprocessormanufacturedbyfabricationofcastcomponents,aswellascorrespondingjoints,inasizerangeextendingfromDN40toDN2000,inclusive.Thisstandardspecifiesrequirementsformaterials,dimensionsandtolerances,mechanicalpropertiesandstandardcoatingsofductileironpipesandfittings.Italsogivesperformancerequirementsforallcomponentsincludingjoints.Jointdesignandgasketshapesareoutsidethescopeofthisstandard.NOTEInthisstandard,allpressuresarerelativepressures,expressedinbars(100kPa=1bar).
【中国标准分类号】:J15
【国际标准分类号】:23_040_10;23_040_40
【页数】:91P.;A4
【正文语种】:德语