ASTM D2854-1996(2004) 活性碳的表面密度的标准试验方法
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【英文标准名称】:StandardTestMethodforApparentDensityofActivatedCarbon
【原文标准名称】:活性碳的表面密度的标准试验方法
【标准号】:ASTMD2854-1996(2004)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:D28.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:密度;试验;碳;活性碳
【英文主题词】:activatedcarbon;granularactivatedcarbon
【摘要】:Thistestmethodprovidesamethodfordeterminingthepackeddensityofabedofgranularactivatedcarbon.Determinationofthepackeddensityisessentialwhendesigningvesselstoholdthematerialandfororderingpurposeswhenprocuringmaterialstofillexistingvessels.FIG.1AssemblyofApparatus1.1Thistestmethodcoversthedeterminationoftheapparentdensityofgranularactivatedcarbon.Forpurposesofthistestmethod,granularactivatedcarbonisdefinedasaminimumof90%beinglargerthan80mesh.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G76
【国际标准分类号】:71_040_30
【页数】:3P.;A4
【正文语种】:
基本信息
标准名称: | 多孔粒状硝酸铵 |
中标分类: |
化工 >>
化肥、农药 >>
化肥、化学土壤调理剂 |
替代情况: | 转化为HG 3280-90 |
发布日期: | |
实施日期: | 2003-04-01 |
首发日期: | |
作废日期: | |
出版日期: | |
适用范围
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前言
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目录
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引用标准
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所属分类: 化工 化肥 农药 化肥 化学土壤调理剂
【英文标准名称】:StandardPracticeforDeterminingVacuumChamberGaseousEnvironmentUsingaColdFinger
【原文标准名称】:用冷凝管测定真空室气态环境的标准实施规程
【标准号】:ASTME834-2009
【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】:E21.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:coldfinger;contaminationmonitoring;residualgascompositions;vacuumchamber;Coldfingermethod;Gases;Samplingaerospacematerials;Temperaturetests--aircraft/aerospacematerials;Vacuumtesting--aerospacematerials;Aerospaceapplications
【摘要】:Whenappliedinthecaseinwhichthereisnotestiteminthevacuumchamber(suchasduringbake-outoperations),thisproceduremaybeusedtoevaluatetheperformanceofthevacuumchamberinrelationtootherdatafromthesameorotherchambersgiventhatcriticalparameters(forexample,lengthofexposure,temperatureofthechamberandcoldfinger,anisotropy,andsoforth)canberelated.Theprocedurecanbeusedtoevaluatetheeffectsofmaterialsfoundintheresidueonitemsplacedinthevacuumchamber.Theprocedurecanbeusedtodescribetheeffectofapriortestontheresidualgaseswithinavacuumchamber.Byselectingthetimeatwhichthecoolantisintroducedintothecoldfinger,theenvironmentpresentduringaselectedportionofatestcanbecharacterized.Thiscanbeusedtodeterminetherelativeefficacyofcertainvacuumchamberproceduressuchasbake-out.Theproceduremaybeusedtodefinetheoutgassedproductsofatestitemthatcondenseonthecoldfinger.Theproceduremaybeusedindefiningtherelativecleanlinessofavacuumchamber.Inapplyingtheresultsoftheproceduretothevacuumchamberingeneral,considerationmustbegiventotheanisotropyofthemolecularfluxeswithinthechamber.Theprocedureissensitivetoboththepartialpressuresofthegasesthatformthecondensiblesandthetimeofexposureofthecoldfingeratcoolanttemperatures.Theprocedureissensitivetoanylossesofsamplethatmayoccurduringthevarioustransferoperationsandduringthatprocedurewhereinthesolventisevaporatedbyheatingitonasteambath.Note18212;Reactionsbetweensolventandcondensatecanoccurandwouldaffecttheanalysis.1.1Thispracticecoversatechniqueforcollectingsamplesofmaterialsthatarepartoftheresidualgasenvironmentofanevacuatedvacuumchamber.Thepracticeusesadevicedesignatedasax201C;coldfingerx201D;thatisplacedwithintheenvironmenttobesampledandiscooledsothatconstituentsoftheenvironmentareretainedonthecold-fingersurface.1.2Thepracticecoversamethodforobtainingasamplefromthecoldfingeranddeterminingtheweightofthematerialremovedfromthecoldfinger.1.3Thepracticecontainsrecommendationsastowaysinwhichthesamplemaybeanalyzedtoidentifytheconstituentsthatcomprisethesample.1.4Bydeterminingthespeciesthatconstitutethesample,thepracticemaybeusedtoassistindefiningthesourceoftheconstituentsandwhetherthesampleisgenerallyrepresentativeofsamplessimilarlyobtainedfromthevacuumchamberitself.1.5Thispracticecoversalternativeapproachesandusagestowhichthepracticecanbeput.1.6Thedegreeofmolecularfluxanisotropysignificantlyaffectstheassurancewithwhichonecanattributecharacteristicsdeterminedbythisproceduretothevacuumchamberenvironmentingeneral.1.7Thetemperatureofthecoldfingersignificantlyaffectsthequantityandspeciesofmaterialscollected.1.8ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeSection8.
【中国标准分类号】:J78
【国际标准分类号】:23_160
【页数】:4P.;A4
【正文语种】:英语