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ASTM F1394-1992(2005) 测定从气体分配系统阀门产生的粒子成分的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminationofParticleContributionfromGasDistributionSystemValves
【原文标准名称】:测定从气体分配系统阀门产生的粒子成分的标准试验方法
【标准号】:ASTMF1394-1992(2005)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:F01.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;阀门;分配系统;气体分配
【英文主题词】:Condensationnucleuscounter(CNC);Electricalconductors-semiconductors;Flowandflowrate-semiconductorapplications;Gasdistributionsystems;Laserparticlecounter(LPC);Lasersandlaserapplications;Mechanicalstress;Minimumdetectionlim
【摘要】:Thepurposeofthistestmethodistodefineaprocedurefortestingcomponentsintendedforinstallationintoahigh-puritygasdistributionsystem.Applicationofthistestmethodisexpectedtoyieldcomparabledataamongcomponentstestedforthepurposesofqualificationforthisinstallation.BackgroundTesting8212;Thistestmethodusesbackgroundtestingtoensurethatthesystemisnotcontributingparticlesabovealow,acceptablelevel.Thisensuresthatcountsseenarefromthetestdevice,notfromacontaminatedsystem.Thetechniquesusedtoobtainbackgroundcountsdonotproduceconditionsidenticaltotheconditionsexistingwhenatestdeviceisinplace.Itisrecommendedthatthecontrolproductsberunperiodicallytoseethattheygiveconsistentresults.Thesecontrolproductsshouldbethelowestparticlereleaseproducts.Theywillbeadditionalproofthatthesystemisnotcontributingexcessparticlesduringthestatic,dynamic,orimpactportionsofthetest.Thistestmethodcanbeusedfortestinglengthsoftubing.Theflowcriteriawillbeidenticaltothatindicatedforvalves.Atubingtestwouldonlyincludethestaticbackground,theimpactbackground,andthestaticandimpactportionsofthemethod.Adynamicportioncouldbeaddedbyactuatingtheupstreampneumaticvalve(PV1),thuscreatingaflowsurgetothetestlengthoftubing.1.1Thistestmethodcoversgasdistributionsystemcomponentsintendedforinstallationintoahigh-puritygasdistributionsystem.1.1.2Thistestmethoddescribesaproceduredesignedtodrawstatisticallysignificantcomparisonsofparticulategenerationperformanceofvalvestestedunderaggressiveconditions.1.1.3Thistestmethodisnotintendedasamethodologyformonitoringon-goingparticleperformanceonceaparticularvalvehasbeentested.1.2Thistestmethodutilizesacondensationnucleuscounter(CNC)appliedtoin-linegasvalvestypicallyusedinsemiconductorapplications.Itappliestoautomaticandmanualvalvesofvarioustypes(suchasdiaphragmsorbellows),6.3through12.7-mm(1/4through1/2-in.)size.Forapplicationsofthistestmethodtolargervalves,seethetableintheappendix.1.2.1Valveslargerthan12.7mm(1/2in.)canbetestedbythismethodology.Theteststandmustbesizedaccordingly.Componentslargerthan12.7mm(1/2in.)shouldbetestedwhilemaintainingaReynoldsnumberof20000to21000.ThisistheReynoldsnumberfor12.7-mm(1/2-in.)componentstestedatavelocityof30.5m/s(100ft/s).1.3Limitations:1.3.1Thistestmethodisapplicabletototalparticlecountgreaterthantheminimumdetectionlimit(MDL)ofthecondensationnucleusparticlecounteranddoesnotconsiderclassifyingdataintovarioussizeranges.1.3.1.1Itisquestionablewhethersignificantdatacanbegeneratedfromnondynamiccomponents(suchasfittingsandshortlengthsoftubing)tocompare,withstatisticalsignificance,tothedatageneratedfromthespoolpiece.Forthisreason,thistestmethodcannotreliablysupportcomparisonsbetweenthesetypesofcomponents.1.3.1.2Ifdetectionorclassificationofparticles,orboth,inthesizerangeoflaserparticlecounter(LPC)technologyisofinterest,anLPCcanbeutilizedfortestingcomponents.Flowrates,testtimes,samplingapparatus,anddataanalysisoutlinedinthistestmethoddonotapplyforusewithanLPC.Becauseofthesevariations,datafromCNCsarenotcomparabletodatafromLPCs.1.3.2Thistestmethodspecifiesflowandmechanicalstressconditionsinexcessofthoseconsideredtypical.Theseconditionsshouldnotexceedthoserecommendedbythemanufacturer.Actualperformanceundernormaloperatingconditionsmayvary.......
【中国标准分类号】:J16
【国际标准分类号】:23_060_20;23_060_10
【页数】:27P.;A4
【正文语种】:


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Product Code:SAE AMS3411
Title:Flux, Silver Brazing, High Temperature
Issuing Committee:Ams B Finishes Processes And Fluids Committee
Scope:This specification covers a silver-brazing flux in paste form.
基本信息
标准名称:农作物品种审定规范 玉米
英文名称:Registration of field crop variety Maize(Zea mays L.)
中标分类: 农业、林业 >> 粮食与饲料作物 >> 粮食、饲料作物综合
ICS分类: 农业 >> 农业和林业 >> 农业和林业综合
发布部门:中华人民共和国农业部
发布日期:2006-12-06
实施日期:2007-02-01
首发日期:
作废日期:
主管部门:中华人民共和国农业部
提出单位:中华人民共和国农业部
归口单位:中华人民共和国农业部
起草单位:全国农业技术推广服务中心、中国农业科学院等
起草人:孙世贤、张世煌、李登海、王延波等
出版社:中国农业出版社
出版日期:2007-02-01
页数:9页
适用范围

本标准规定了玉米品种国家审定时应具备的产量、品质和抗逆性等指标。本标准适用于国家农作物品种审定委员会玉米品种审定,适用于国家农作物品种试验主管部门向品种审定委员会推荐玉米品种。

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所属分类: 农业 林业 粮食与饲料作物 粮食 饲料作物综合 农业 农业和林业 农业和林业综合