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【英文标准名称】:Rotatingelectricalmachines-Part9:noiselimits.
【原文标准名称】:旋转电机.第9部分:噪声限值
【标准号】:NFC51-119-2005
【标准状态】:现行
【国别】:法国
【发布日期】:2005-08-01
【实施或试行日期】:2005-08-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:K20
【国际标准分类号】:17_140_20;29_160_01
【页数】:17P;A4
【正文语种】:其他


【英文标准名称】:StandardTestMethodforHotCompressionPropertiesofGasketMaterials
【原文标准名称】:衬垫材料的热压特性的标准试验方法
【标准号】:ASTMF2837-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:F03.40
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:coldcreep;compression;compressionset;creep;gasket;gasketcompression;hotcompression;hotcreep;strain;stress;thicknesschange
【摘要】:Thehotcompressionpropertiesofagasketmaterial,includingcreepresistanceandcompressionset,areamajorfactorwithregardtotheselectionofagivenmaterialforuseinaparticularsealingapplication.Thesignificanceofthetestmethodisbased,inpart;ontheassumptionthatifamaterialexhibitstoomuchcreepatelevatedtemperaturethatitwillnolongerfunctionaseffectivelyasaseal.Thisassumptioncanonlybeusedasaguide;however,sinceexactyieldorfailurepointsaredifficulttodefineforgasketmaterials(whichareusuallyviscoelasticinnature).Twoormorematerialscanbecomparedtodeterminedifferencesintheirhotcompressionproperties.Asampleofmaterialcanbecomparedtoanestablishedstandardorpreviouslydeterminedcharacteristicsonoriginallotsofthesamematerial,forqualityassurancepurposes.Samplesaretobetestedwitharaisedprofileinsertorcalibrationringdescribedin6.3andFig.1sothatthearea(2042mm2(3.17in.2))remainsconstantduringthetest.FIG.1TestAssemblyforDeterminingHotCompression1.1Thistestmethodcoversameansofmeasuringthehotcompressionpropertiesofagasketmaterialbymeasuringitscreepunderaconstantloadatbothroomtemperatureandwhileincreasingthetemperature.Shorttermcreeppropertiesincludingbothcoldandhotcreep,totalcreepandcompressionsetofagasketmaterialcanbedetermined.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G43
【国际标准分类号】:21_140
【页数】:4P.;A4
【正文语种】:英语