BS 4470-1996 异丁烯-异戊二烯生橡胶(IIR)硫化特性的评估方法

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【英文标准名称】:TestMethodforThermalEnduranceofFilm-InsulatedRoundMagnetWire
【原文标准名称】:薄膜绝缘磁性圆钢丝耐热性的试验方法
【标准号】:ASTMD2307-1986
【标准状态】:作废
【国别】:美国
【发布日期】:1986
【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】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:绝缘;电绝缘;磁的;试验;金属线;容许的;热稳定性;电气工程;箔;电缆
【英文主题词】:insulations;electricalinsulation;foil;thermalstability;electricalengineering;wires;testing;magnetic;permissible;cables
【摘要】:
【中国标准分类号】:L19
【国际标准分类号】:29_060_10
【页数】:12P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforPreparingCoalSamplesforAnalysis
【原文标准名称】:分析用煤样品的标准制备方法
【标准号】:ASTMD2013/D2013M-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】:D05.23
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:煤
【英文主题词】:coal;composite;division;reduction;Coalsamplingsystems
【摘要】:Otherstandardsareusedtocollectthegrosssample:PracticeD2234/D2234Mallowsforonedivisionofthegrosssamplebeforecrushing.Themassandtopsizeofthegrossordividedsamplecollectedbyusingtheseguidesandpracticesareusuallytoolargeforchemicalorphysicaltesting.PracticeD2013provideinstructionsforreducinganddividingthegrossordividedsample,byon-lineoroff-lineprocesses,orboth,toatopsizeandmasssuitabletotheperformanceoftesting.Anybiasinthegrossordividedsamplebeforeadherencetothispracticewillremaininthefinalsampleresultingfromuseofthispractice.Therefore,carefullyselectthestandardtobeusedtocollectthegrosssample.Divisionandreductionofasamplemayoccuratmorethanonelocation.Mostoften,thesampleiscollected,reduced,anddivided(oneormoretimes)byuseofamechanicalsamplingsystem.Theremainingsamplemaybefurtherdividedon-sitetofacilitatetransportingittothelaboratorywherefurtherreductionanddivisionlikelyoccursbeforeanalysis.Inplaces,thispracticerequiresairdryingthesamplebeforesubsequentreduction.Proceduresforairdryingandair-drylossdeterminationareprovidedinTestMethodD3302.Mostoften,samplesarereducedanddividedtoananalysissample.However,sometestsmayrequireasampleofdifferentmassortopsize.Thisproceduremaybeusedtoprovideasampleofanymassandsizeconsistfromthegrossordividedsampleto,andincluding,theanalysissample.Thispracticealsospecifieshowtopreparecompositesamples,ifrequired.1.1Thispracticecoversthereductionanddivisionofgrossordividedsamples,andthepreparationofcompositesamples,uptoandincludingtheindividualportionsforlaboratoryanalysis.1.2Reductionanddivisionproceduresareprescribedforcoalsofthefollowinggroups:1.2.1GroupAincludescoalsthathavebeencleanedinallsizes.1.2.2GroupBincludesallothercoals.UnknowncoalsaretobeconsideredunderGroupB.1.2.3GroupAallowssmallerweightlaboratorysamplestoberetainedthanGroupB.Theselowerweightsmaybeusedforparticularcoalsiftheyhavebeenshown,byusingtheproceduresofAnnexA1.2,togiveasamplepreparationandanalysisvariancewhichisnomorethan20%ofthetotalanalysisvariance.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareprovidedforinformationpurposesonly.A1.1.1Thismethodcoversproceduresforcheckingprecisionofsamplepreparationandanalysisofthevariousstages.Thedataobtainedfromtestsusingconsistentsamplepreparationandanalysismethodareusedtoestimatetherandomerrorsinthevariousstagesofsampledivisionandanalysis.A1.......
【中国标准分类号】:D21
【国际标准分类号】:73_040
【页数】:11P.;A4
【正文语种】:英语