IEEE 1588 INT 1-10-2009 网络测量与控制系统用精密时钟同步用IEEE标准

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【英文标准名称】:CommonrulesforprecastconcreteproductsEnglishversionofDINEN13369/A1:2006-09
【原文标准名称】:预制混凝土产品的通用规则
【标准号】:EN13369/A1-2006
【标准状态】:现行
【国别】:
【发布日期】:2006-09
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:验收试验;建筑物;检验;组件;化合物;混凝土构件;铰接式接头;混凝土结构;混凝土;合格;合格评定;建筑;施工材料;建筑产品;尺寸选定;尺寸;架设(施工作业);总论;作标记;预浇铸混凝土部件;预制的;预制配件;生产;生产控制;特性;质量;质量控制;质量要求;加筋;可靠度;耐力;规则;规范(验收);术语;试验;运输;验证
【英文主题词】:Acceptancetests;Buildings;Checks;Components;Compound;Concretecomponents;Concreteproducts;Concretestructures;Concretes;Conformity;Conformityassessment;Construction;Constructionmaterials;Constructionalproducts;Dimensioning;Dimensions;Erecting(constructionoperation);Generalsection;Marking;Precastconcreteparts;Prefabricated;Prefabricatedparts;Production;Productioncontrol;Properties;Quality;Qualitycontrol;Qualityrequirements;Reinforcement;Reliability;Resistance;Rules;Specification(approval);Terminology;Testing;Transport;Verification
【摘要】:
【中国标准分类号】:Q14
【国际标准分类号】:91_100_30
【页数】:5P.;A4
【正文语种】:英语


【英文标准名称】:StandardGuideforMetalsFreeSteamDeactivationofFreshFluidCrackingCatalysts
【原文标准名称】:淡水分裂催化剂的金属自由蒸汽去活化作用标准指南
【标准号】:ASTMD4463-1996(2006)
【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】:D32.04
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:润滑剂;石油产品;催化剂;蒸气;试验
【英文主题词】:catalysts;cracking;ceactivation;hydrothermaltreatment;steamdeactivationoffreshfluidcrackingcatalysts;steamdeactivation
【摘要】:Ingeneral,steamtreatmentofFCCcatalystcanbeusedeithertocompareaseriesofcrackingcatalystsatasimulatedequilibriumconditionorconditions,ortosimulatetheequilibriumconditionofaspecificcrackingunitandaspecificcatalyst.Thisguidegivesanexampleforthefirstpurposeandanapproachforthelatterpurpose.1.1Thisguidecoversthedeactivationoffreshfluidcatalyticcracking(FCC)catalystbyhydrothermaltreatmentpriortothedeterminationofthecatalyticcrackingactivityinthemicroactivitytest(MAT).1.2ThehydrothermaltreatmentoffreshFCCcatalyst,priortotheMAT,isimportantbecausethecatalyticactivityofthecatalystinitsfreshstateisaninadequatemeasureofitstruecommercialperformance.Duringoperationinacommercialcrackingunit,thecatalystisdeactivatedbythermal,hydrothermalandchemicaldegradation.Therefore,tomaintaincatalyticactivity,freshcatalystisadded(semi)continuouslytothecrackingunit,toreplacecatalystlostthroughthestackorbywithdrawal,orboth.Understeadystateconditions,thecatalystinventoryoftheunitiscalledequilibriumcatalyst.Thiscatalysthasanactivitylevelsubstantiallybelowthatoffreshcatalyst.Therefore,artificiallydeactivatingafreshcatalystpriortodeterminationofitscrackingactivityshouldprovidemoremeaningfulcatalystperformancedata.1.3DuetothelargevariationsinpropertiesamongfreshFCCcatalysttypesaswellasbetweencommercialcrackingunitdesignsoroperatingconditions,orboth,nosinglesetofsteamdeactivationconditionsisadequatetoartificiallysimulatetheequilibriumcatalystforallpurposes.1.3.1Inaddition,therearemanyotherfactorsthatwillinfluencethepropertiesandperformanceoftheequilibriumcatalyst.Theseinclude,butarenotlimitedto:depositionofheavymetalssuchasNi,V,Cu;depositionoflightmetalssuchasNa;contaminationfromattritedrefractoryliningsofvesselwalls.Furthermore,commerciallyderivedequilibriumcatalystrepresentsadistributionofcatalystsofdifferentages(fromfreshto>300days).Despitetheseapparentproblems,itispossibletoobtainreasonablycloseagreementbetweentheperformancesofsteamdeactivatedandequilibriumcatalysts.Itisalsorecognizedthatitispossibletosteamdeactivateacatalystsothatitspropertiesandperformancepoorlyrepresenttheequilibrium.Itisthereforerecommendedthatwhenassessingtheperformanceofdifferentcatalysttypes,acommonsteamingconditionbeused.Catalystdeactivationbymetalsdepositionisnotaddressedinthisguide.1.4Thisguideofferstwoapproachestosteamdeactivatefreshcatalysts.Thefirstpartprovidesspecificsetsofconditions(time,temperatureandsteampressure)thatcanbeusedasgeneralpre-treatmentspriortocomparisonoffreshFCCcatalystMATactivities(TestMethodD3907)oractivitiesplusselectivities(TestMethodD5154).1.4.1ThesecondpartprovidesguidanceonhowtopretreatcatalyststosimulatetheirdeactivationinaspecificFCCUandsuggestscatalystpropertieswhichcanbeusedtojudgeadequacyofthesimulation.ThistechniqueisespeciallyusefulwhenexamininghowdifferenttypesofcatalystmayperforminaspecificFCCU,providednootherchanges(catalystadditionrate,regeneratortemperature,contaminantmetalslevels,etc.)occur.Thisapproachcoverscatalystphysicalpropertiesthatcanbeusedasmonitorstoindicatetheclosenesstoequilibriumcatalystproperties.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesan......
【中国标准分类号】:G74
【国际标准分类号】:71_040_30
【页数】:3P.;A4
【正文语种】: