ANSI/ASTM E814a-2008 渗透挡火物防火试验用试验方法

上一篇: ISO 20565-1-2008 含铬耐火材料产品和含铬原材料的化学分析(可选择X射线荧光法).第1部分:装置、试剂、重量分析硅石的溶解和测定
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【英文标准名称】:Termsforrailwayvehicleparts;installationsforinter-combustionengines;fuelinstallationformotorpowerunits
【原文标准名称】:轨道车辆零件术语.内燃机用装置.移动执行机构的燃料装置
【标准号】:DIN25689-1-1984
【标准状态】:作废
【国别】:德国
【发布日期】:1984-10
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:词汇;燃料装置;定义;铁道车辆;内燃机;铁路车辆零部件;燃气轮机;机车;涡轮机;牵引车辆;发动机燃料系统
【英文主题词】:Definition;Definitions;Enginefuelsystems;Gasturbines;Internalcombustionengines;Locomotives;Railwayapplications;Railwayvehiclecomponents;Railwayvehicles;Railways;Tractionvehicles;Turbines;Voc
【摘要】:
【中国标准分类号】:S42
【国际标准分类号】:01_040_45;45_060_10
【页数】:2P;A4
【正文语种】:德语


【英文标准名称】:Statisticalaspectsofsamplingfrombulkmaterials-Part2:Samplingofparticulatematerials
【原文标准名称】:块材料抽样的统计方面第2部分：颗粒材料的抽样
【标准号】:ISO11648-2-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-10
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC69
【标准类型】:()
【标准水平】:()
【中文主题词】:散装物料;试样制备;统计学;试样;材料特性;散装货物;定义;预混材料;试样;抽样方法;取样;统计方法分析
【英文主题词】:Bulkgoods;Bulkmaterials;Definitions;Materialbehaviour;Premixedmaterials;Samples;Sampling;Samplingmethods;Specimenpreparation;Statisticalmethodsofanalysis;Statistics;Testspecimens
【摘要】:ThispartofISO11648establishesthebasicmethodsforsamplingparticipatematerialsinbulk(e.g.ores,mineralconcentrates,coal,industrialchemicalsinpowderorgranularform,andagriculturalproductssuchasgrain)frommovingstreamsandstationarysituations,includingstopped-beltsampling,toprovidesamplesformeasuringoneormorevariablesinanunbiasedmannerandwithaknowndegreeofprecision.Thevariablesaremeasuredbychemicalanalysisand/orphysicaltesting.Thesesamplingmethodsareapplicabletomaterialsthatrequireinspectiontoverifycompliancewithproductspecificationsorcontractsettlements,tocalculatethevalueofthelotmeanofameasurablequantityasabasisforsettlementbetweentradingpartners,ortoestimatethesetofvariablesandvariancesthatdescribesasystemorprocedure.Stopped-beltsamplingisthereferencemethodagainstwhichothersamplingproceduresarecompared.Dynamicsamplingfrommovingstreamsisthepreferredmethodwherebyasamplingdevice(calledacutter)ispassedthroughthestreamoftheparticulatematerial.Acompletecross-sectionofthemovingstreamcanberemovedasaprimaryincrementataconveyorbelttransferpointwithafalling-streamcutter,orremovedfromthebeltwithacross-beltcutter.Inbothcases,theselectionandextractionofincrementscanbedescribedbyaone-dimensionaidynamicsamplingmodel.Staticsamplingofbulkmaterialfromstationarysituations,suchasstockpiles,railorroadwagons,theholdsofshipsandbarges,silos,andevencomparativelysmallvolumes,isusedonlywheresamplingfrommovingstreamsisnotpossible.Suchsamplingfromthree-dimensionallotsispronetosystematicerrors,becausesomepartsofthelotusuallyhavereducedornochanceofbeingcollectedforthegrosssample.Thisisinviolationoftherequirementofthethree-dimensionalsamplingmodelthatallpartshaveanequalprobabilityofbeingcollected.TheproceduresdescribedinthispartofISO11648forsamplingfromstationarylotsofbulkparticulatematerialwithimplementssuchasmechanicalaugersmerelyminimizesomeofthesystematicsamplingerrors.Forthesereasons,thispartofISO11648isprimarilyconcernedwithdynamicsamplingfrommovingstreamsorstopped-beltstaticsamplingfromconveyorbeltsandisbasedonasamplingmodelforone-dimensionallots.Nonetheless,proceduresforstaticsamplingfromthree-dimensionallotsareprovidedwherethesesituationscannotbeavoided.ThispartofISO11648isconcernedwiththemethodsofsamplingparticulatematerialsinbulkwiththeobjectiveofobtainingunbiasedmeasurementsofoneormorevariablesofthematerialwithaknowndegreeofprecision.However,itdoesnotprovidemethodsfordecidingwhethertoacceptorrejectabulkmateriallotwithspecifieddegreesofriskofacceptingasub-standardlot,orofrejectingwhatisinfactanacceptablelot.Theselatterproceduresareusuallycalledacceptancesamplingorsamplinginspectionmethods.
【中国标准分类号】:A82
【国际标准分类号】:03_120_30
【页数】:102P.;A4
【正文语种】:英语