ANSI/ASTM D4672-1991 测定聚氨酯原料共聚物水含量的试验方法
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【英文标准名称】:TestMethodsforPolyurethaneRawMaterials:DeterminationofWaterContentofPolyols(08.03)
【原文标准名称】:测定聚氨酯原料共聚物水含量的试验方法
【标准号】:ANSI/ASTMD4672-1991
【标准状态】:作废
【国别】:美国
【发布日期】:1991
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:含量测定;试验;聚氨酯;塑料
【英文主题词】:polyurethane;testing;plastics;determinationofcontent
【摘要】:
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:
【正文语种】:英语
【英文标准名称】:Fansforgeneralpurposes-Specificationsforbalancingandvibration
【原文标准名称】:通用风扇.平衡和振动规范
【标准号】:BS848-7-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-05-14
【实施或试行日期】:2003-05-14
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:平衡;定义;定义(术语);影响;通风设备;振动;振动效果;振动强度
【英文主题词】:Balancing;Definition;Definitions;Impacts;Ventilators;Vibration;Vibrationeffects;Vibrationintensity
【摘要】:ThisInternationalStandardgivesspecificationsforvibrationandbalancelimitsoffansforallapplicationsexceptthosedesignedsolelyforaircirculation,forexample,ceilingfansandtablefans.However,itislimitedtofansofalltypesinstalledwithapoweroflessthan300kWortoacommerciallyavailablestandardelectricmotorwithamaximumpowerof355kW(followinganR20series).Forfansofgreaterpowerthanthis,theapplicablelimitsarethosegiveninISO10816-3.Wherethefansinaninstallationhavevaryingpowersbothaboveandbelow300kW,andhavebeenthesubjectofasinglecontract,thenthemanufacturerandpurchasershallagreeontheappropriatestandardtobeused.Thisshouldnormallybebasedonthemajorityofunits.VibrationdatamayberequiredforavarietyofpurposesasdetailedinClause5.TheInternationalStandardrecognizesthatvibrationalmeasurementsmayberecordedasvelocity,accelerationordisplacementeitherinabsoluteunitsorindecibelsaboveagivenreferencelevel.Themagnitudeofvibrationmeasurementsmaybeaffectedbyassemblypracticesatbalancingmachines(seeAnnexB).Thepreferredparameteris,however,thevelocity,inmillimeterspersecond(mm/s).Astheconventionsvaryindifferentpartsoftheworld,bothr.m.s.(rootmeansquare)andpeak-to-peakorpeakvaluesaregiven.Itshouldalsoberememberedthatafananditspartsmaybeconsideredasaspring-masssystem.Anunderstandingofthisfacthelpstoresolvemostvibrationalproblems(seeAnnexD).Accounthasalsobeentakenofthefactthatfactorytestsareusuallyconductedwiththefanunconnectedtoaductingsystem,suchthatitsaerodynamicdutymaybeconsiderablydifferentfromthatduringnormaloperation.Itmayalsobesupportedontemporaryfoundationsofdifferentmassandstiffnesstothoseusedinsitu.Accordingly,suchtestsarespecifiedwithvibrationmeasured“filter-in”.Insitutestsarespecified“filter-out”andassuchrepresentameasureofoverallvibrationseverity.ThisInternationalStandardcoversfanequipmentwithrigidrotors,generallyfoundin:commercialheating,ventilatingandairconditioning,industrialprocesses,mine/tunnelventilationandpower-generationapplications.Otherapplicationsarenotspecificallyexcluded.Excludedareinstallationswhichinvolvesevereforces,impactsorextremetemperatures.AnyorallportionsofthisInternationalStandard,ormodificationsthereof,aresubjecttoagreementbetweenthepartiesconcerned.Fan-equipmentfoundationsandinstallationpracticesarebeyondthescopeofthisInternationalStandard.Foundationdesignandfaninstallationarenotnormallytheresponsibilitiesofthefanmanufacturer.Itisfullyexpectedthatthefoundationsuponwhichthefanismountedwillprovidethesupportandstabilitynecessarytomeetthevibrationcriteriaofthefanasitisdeliveredfromthefactory.Otherfactors,suchasimpellercleanliness,aerodynamicconditions,backgroundvibration,operationatspeedsotherthanthoseagreedupon,andmaintenanceofthefan,affectthefan-vibrationlevelsbutarebeyondthescopeofthisInternationalStandard.ThisInternationalStandardisintendedtocoveronlythebalanceorvibrationofthefananddoesnottakeintoaccounttheeffectoffanvibrationonpersonnel,equipmentorprocesses.
【中国标准分类号】:J72
【国际标准分类号】:17_160;23_120
【页数】:48P.;A4
【正文语种】:英语
【英文标准名称】:StandardSpecificationforSiliconeFluidUsedforElectricalInsulation
【原文标准名称】:电绝缘用硅酮液的标准规范
【标准号】:ASTMD4652-2005
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:电气工程;电绝缘;绝缘液体;绝缘;塑料;硅酮
【英文主题词】:Electricalengineering;Electricalinsulation;Insulatingliquids;Insulations;Plastics;Silicones
【摘要】:
【中国标准分类号】:K15
【国际标准分类号】:29_035_20;71_100_55
【页数】:2P;A4
【正文语种】:英语
