MIL-STD-1247C (NOTICE 5), MILITARY STANDARD: MARKING, FUNCTIONS, AND HAZARD DESIGNATIONS OF HOSE, PIPE, AND TUBE LINES FOR AIRCRAFT MISSILE, AND SPACE SYSTEMS (22 JAN 2008)., MIL-STD-1247C, Dated 13 October 1989, is hereby reinstated as inactive for new designand may be used for acquisition.【英文标准名称】:StandardTestMethodforPredictingLong-TermThermalResistanceofClosed-CellFoamInsulation
【原文标准名称】:闭室泡沫塑料绝缘的长期热阻预测用标准试验方法
【标准号】:ASTMC1303-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:C16.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:变化;泡沫塑料;长期的;硬质泡沫塑料;试验;热阻;时间
【英文主题词】:aging;long-termthermalresistance;LTTR;rigidclosed-cellplasticfoams;scalingfactors;thermalinsulation;thermalresistance;time-averagedthermalresistance;
【摘要】:1.1Thistestmethodcoversaprocedureforpredictingthelong-termthermalresistance(LTTR)ofunfacedorpermeablyfacedrigidgas-filledclosed-cellfoaminsulationsbyreducingthespecimenthicknesstoaccelerateagingundercontrolledlaboratoryconditions().1.2Rigidgas-filledclosed-cellfoaminsulationincludesallcellularplasticinsulationsmanufacturedwiththeintenttoretainablowingagentotherthanair.1.3Thistestmethodislimitedtounfacedorpermeablyfaced,homogeneousmaterials.Thismethodisappliedtoawiderangeofrigidclosed-cellfoaminsulationtypes,includingbutnotlimitedto:extrudedpolystyrene,polyurethane,polyisocyanurate,andphenolic.Thistestmethoddoesnotapplytoimpermeablyfacedrigidclosed-cellfoamsortorigidclosed-cellbunstockfoams.Note1SeeNote0formoredetailsregardingtheapplicabilityofthistestmethodtorigidclosed-cellbunstockfoams.1.4Thistestmethodutilizesreferencedstandardtestproceduresformeasuringthermalresistance.Periodicmeasurementsareperformedonspecimenstoobservetheeffectsofaging.Specimensofreducedthickness(thatis,thinslices)areusedtoshortenthetimerequiredfortheseobservations.Theresultsofthesemeasurementsareusedtopredictthelong-termthermalresistanceofthematerial.1.5Thetestmethodisgivenintwoparts.ThePrescriptiveMethodinPartAprovideslong-termthermalresistancevaluesonaconsistentbasisthatcanbeusedforavarietyofpurposes,includingproductevaluation,specifications,orproductcomparisons.TheResearchMethodinpartBprovidesageneralrelationshipbetweenthermalconductivity,age,andproductthickness.1.5.1TousethePrescriptiveMethod,thedateofmanufacturemustbeknown,whichusuallyinvolvesthecooperationofthemanufacturer.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundvaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G32
【国际标准分类号】:83_100;83_100
【页数】:17P.;A4
【正文语种】: