ASTM D 2996-2000 纤维缠绕"纤维玻璃"(玻璃纤维增强热固性树脂管)标准规范

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【英文标准名称】:StandardPracticeforGuarded-Hot-PlateDesignUsingCircularLine-HeatSources
【原文标准名称】:使用圆形线性加热源的护热板设计的标准实施规程
【标准号】:ASTMC1043-2006(2010)
【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】:C16.30
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:防护热板装置;热流;线光源加热器;恒定态;导热性;隔热;热变电阻
【英文主题词】:guardedhotplateapparatus;heatflow;linesourceheater;steadystate;thermalconductivity;thermalinsulation;thermalresistance
【摘要】:Thispracticedescribesthedesignofaguardedhotplatewithcircularline-heatsourcesandprovidesguidanceindeterminingthemeantemperatureofthemeterplate.Itprovidesinformationandcalculationproceduresfor:(1)controlofedgeheatlossorgain(AnnexA1);(2)locationandinstallationofline-heatsources(AnnexA2);(3)designofthegapbetweenthemeterandguardplates(AppendixX1);and(4)locationofheaterleadsforthemeterplate(AppendixX2).Acircularguardedhotplatewithoneormoreline-heatsourcesisamenabletomathematicalanalysissothatthemeansurfacetemperaturecanbecalculatedfromthemeasuredpowerinputandthemeasuredtemperature(s)atoneormoreknownlocations.Further,acircularplategeometrysimplifiesthemathematicalanalysisoferrorsresultingfromheatgainsorlossesattheedgesofthespecimens(seeRefs(10,11)).Inpractice,itiscustomarytoplacetheline-heatsource(s)inthemeterplateataprescribedradiussuchthatthetemperatureattheouteredgeofthemeterplateisequaltothemeansurfacetemperatureoverthemeterarea.Thus,thedeterminationofthemeantemperatureofthemeterplatecanbeaccomplishedwithasmallnumberoftemperaturesensorsplacednearthegap.Aguardedhotplatewithoneormoreline-heatsourceswillhavearadialtemperaturevariation,withthemaximumtemperaturedifferencesbeingquitesmallcomparedtotheaveragetemperaturedropacrossthespecimens.Providedguardingisadequate,onlythemeansurfacetemperatureofthemeterplateentersintocalculationsofthermaltransmissionproperties.Caremustbetakentodesignacircularline-heat-sourceguardedhotplatesothattheelectric-currentleadstoeachheatereitherdonotsignificantlyalterthetemperaturedistributionsinthemeterandguardplatesorelseaffectthesetemperaturedistributionsinaknownwaysothatappropriatecorrectionscanbemade.Theuseofoneorafewcircularline-heatsourcesinaguardedhotplatesimplifiesconstructionandrepair.Forroom-temperatureoperation,theplatesaretypicallyofone-piecemetalconstructionandthusareeasilyfabricatedtotherequiredthicknessandflatness.Thedesignofthegapisalsosimplified,relativetogapdesignsfordistributed-heat-sourcehotplates.Inthesingle-sidedmodeofoperation(seePracticeC1044),thesymmetryoftheline-heat-sourcedesignintheaxialdirectionminimizeserrorsduetoundesiredheatflowacrossthegap.1.1Thispracticecoversthedesignofacircularline-heat-sourceguardedhotplateforuseinaccordancewithTestMethodC177.Note18212;TestMethodC177describestheguarded-hot-plateapparatusandtheapplicationofsuchequipmentfordeterminingthermaltransmissionpropertiesofflat-slabspecimens.Inprinciple,thetestmethodincludesapparatusdesignedwithguardedhotplateshavingeitherdistributed-orline-heatsources.1.2Theguardedhotplatewithcircularline-heatsourcesisadesigninwhichthemeterandguardplatesarecircularplateshavingarelativelysmallnumberofheaters,eachembeddedalongacircularpathatafixedradius.Inoperation,theheatfromeachline-heatsourceflowsradiallyintotheplateandistransmittedaxiallythroughthetestspecimens.1.3Themeterandguardplatesarefabricatedfromacontinuouspieceofthermallyconduc......
【中国标准分类号】:
【国际标准分类号】:17_200_10
【页数】:16P.;A4
【正文语种】:


【英文标准名称】:Oilseeds.Sampling.
【原文标准名称】:油籽.抽样
【标准号】:NFV03-900-1995
【标准状态】:现行
【国别】:法国
【发布日期】:1995-06-01
【实施或试行日期】:1995-06-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Agriculturalproducts;Agriculture;Collectingsample;Definitions;Delivery;Equipment;Foodproducts;Individualsample;Laboratorysample;Lot;Methods;Oils;Oilseeds;Oleaginousseeds;Products;Samplingequipment;Samplingmethods;Sidetesters;Vegetable;Vegetableoils
【摘要】:
【中国标准分类号】:B33
【国际标准分类号】:67_200_20
【页数】:14P.;A4
【正文语种】:其他