MIL-STD-875A (NOTICE 1)
时间:2024-05-19 12:03:50 来源: 标准资料网 作者：标准资料网 阅读：8416
MIL-STD-875A (NOTICE 1), MILITARY STANDARD, TYPE DESIGNATION SYSTEM FOR AERONAUTICAL AND SUPPORT EQUIPMENT (26 FEB 1988) [S/S BY MIL ST-1812]. MIL-STD-875A dated 30 April 1974 has been reviewed and determined to be valid for use in acquisition.
【英文标准名称】:StandardTestMethodforUsingHeatFlowMeterApparatustoMeasuretheCenter-of-PanelThermalResistivityofVacuumPanels
【原文标准名称】:用热流仪表器具测量真空板条中心点耐热性的标准试验方法
【标准号】:ASTMC1667-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:effectivethermalresistance(effectiveR-value);thermalconductivity;thermalresistance;vacuuminsulationpanel;Heatflow;Heatflowmetermethod;Thermalresistance/resistivity;Vacuumpanels
【摘要】:Heatflowmeterapparatusarebeingusedtomeasurethecenter-of-panelportionofavacuuminsulationpanel,whichtypicallyhasaveryhighvalueofthermalresistivity(thatis,equaltoorgreaterthan90m-K/W).AsdescribedinSpecificationC1484,thecenter-of-panelthermalresistivityisused,alongwiththepanelgeometryandbarriermaterialthermalconductivity,todeterminetheeffectivethermalresistanceoftheevacuatedpanel.Usingaheatflowmeterapparatustomeasurethethermalresistivityofnon-homogenousandhighthermalresistancespecimensisanon-standardapplicationoftheequipment,andshallonlybeperformedbyqualifiedpersonnelwithunderstandingofheattransferanderrorpropagation.Familiaritywiththeconfigurationofboththeapparatusandthevacuumpanelisnecessary.Thecenter-of-panelthermaltransmissionpropertiesofevacuatedpanelsvaryduetothecompositionofthematerialsofconstruction,meantemperatureandtemperaturedifference,andthepriorhistory.Theselectionofrepresentativevaluesforthethermaltransmissionpropertiesofanevacuatedpanelforaparticularapplicationmustbebasedonaconsiderationofthesefactorsandwillnotapplynecessarilywithoutmodificationtoallserviceconditions.1.1Thistestmethodcoversthemeasurementofsteady-statethermaltransmissionthroughthecenterofaflatrectangularvacuuminsulationpanelusingaheatflowmeterapparatus.1.2Totalheattransferthroughthenon-homogenousgeometryofavacuuminsulationpanelrequiresthedeterminationofseveralfactors,asdiscussedinSpecificationC1484.Oneofthosefactorsisthecenter-of-panelthermalresistivity.Thecenter-of-panelthermalresistivityisanapproximationofthethermalresistivityofthecoreevacuatedregion.1.3ThistestmethodisbaseduponthetechnologyofTestMethodC518butincludesmodificationsforvacuumpanelapplicationsasoutlinedinthistestmethod.1.4ThistestmethodshallbeusedinconjunctionwithPracticeC1045andPracticeC1058.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q70
【国际标准分类号】:91_060_10
【页数】:8P.;A4
【正文语种】:英语
【英文标准名称】:SafetyRequirementsforTurningCentersandAutomaticNumericallyControlledTurningMachines
【原文标准名称】:旋转中心和自动数控旋转机器的安全要求
【标准号】:ANSIB11.22-2001
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:AMT(ASCB11)
【标准类型】:()
【标准水平】:()
【中文主题词】:自动;自动控制;;机床;机器;数值控制;数字控制机床;安全要求;车削;
【英文主题词】:Automatic;Automaticcontrol;Controlled;Machinetools;Machines;Numericalcontrol;Numericallycontrolledmachines;Safetyrequirements;Turning;Turningcentres
【摘要】:Thisstandardspecifiesthesafetyrequirementsforthedesign,construction,operationandmaintenance(includinginstallation,dismantlingandtransport)ofturningcentersandautomatic,numericallycontrolledturningmachines.
【中国标准分类号】:J59
【国际标准分类号】:25_080_99
【页数】:
【正文语种】:英语