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【英文标准名称】:Cleanroomsandassociatedcontrolledenvironments--Part1:Classificationofaircleanliness
【原文标准名称】:洁净室和相关控制环境.第1部分:空气清洁度的分级
【标准号】:ANSI/IEST/ISO14644-1-1999
【标准状态】:现行
【国别】:美国
【发布日期】:2003-07-29
【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】:IEST
【标准类型】:()
【标准水平】:()
【中文主题词】:无菌室;空气污染;等级;粒子分析;分类;文献工作;清洁(度);方法;气载粉尘;外部面积;粒度分布;纯度标准;杂质试验;颗粒空气污染物;浓缩;粒子数;含量测定;纯净;总量;空气纯度;一致性;粒子浓度;空气质量;定义;分类系统;杂质;纯度;颗粒;数学计算;粒度;纯度分类;洁净室技术;光散测量;纯净空气;试验
【英文主题词】:Airpollution;Airpurity;Airquality;Airbornedust;Amount;Categoriesofpurity;Classes;Classification;Classificationsystems;Cleanrooms;Cleanliness;Clean-roomtechnology;Concentration;Concentrationofparticles;Consistency;Definition;Definitions;Degreeofpurity;Determinationofcontent;Documentations;Exteriorareas;Impurities;Lightscattermeasurement;Mathematicalcalculations;Methods;Numberofparticles;Particleanalysis;Particlesize;Particlesizedistribution;Particles;Particulateairpollutants;Pure;Pureair;Puritycriterion;Puritytest;Testing
【摘要】:ThispartofISO14644coverstheclassificationofaircleanlinessincleanroomsandassociatedcontrolledenvironmentsexclusivelyintermsofconcentrationofairborneparticles.Onlyparticlepopulationshavingcumulativedistributionsbasedonthreshold(lowerlimit)sizesrangingfrom0,1?mto5?mareconsideredforclassificationpurposes.ThispartofISO14644doesnotprovideforclassificationofparticlepopulationsthatareoutsideofthespecifiedparticlesizerange,0,1?mto5?m.Concentrationsofultrafineparticles(particlessmallerthan0,1?m)andmacroparticles(particleslargerthan5?m)maybeusedtoquantifythesepopulationsintermsofUdescriptorsandMdescriptors,respectively.ThispartofISO14644cannotbeusedtocharacterizethephysical,chemical,radiological,orviablenatureofairborneparticles.Note:Theactualdistributionofparticleconcentrationswithinincrementalsizerangesnormallyisnotpredictableandtypicallyisvariableovertime.
【中国标准分类号】:N64
【国际标准分类号】:13_040_35
【页数】:
【正文语种】:英语