BS EN 754-8-1998 铝和铝合金.冷拉短棒材/棒材和管材.出水孔管.尺寸和形状公差
作者:标准资料网 时间:2024-05-12 09:21:00 浏览:8510
来源:标准资料网
【英文标准名称】:Aluminiumandaluminiumalloys-Colddrawnrod/barandtube-Portholetubes,tolerancesondimensionsandform
【原文标准名称】:铝和铝合金.冷拉短棒材/棒材和管材.出水孔管.尺寸和形状公差
【标准号】:BSEN754-8-1998
【标准状态】:作废
【国别】:英国
【发布日期】:1998-12-15
【实施或试行日期】:1998-12-15
【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】:凹形;尺寸公差;深度;棒材;热处理;直线度测量;宽度;冷加工;长度;四方形;拉制;形状公差;退火;铝合金;厚度;直径;尺寸;舷窗;凸形;铝;半径;尺寸测量;公差(测量);管
【英文主题词】:Aluminium;Aluminiumalloys;Aluminiumpipes;Aluminiumtubes;Bulging;Circulartubes;Concave;Convex;Diameter;Dimensions;Drawn;Extruded;Extrusion;Fixedlength;Formtolerances;Height;Hexagon;Length;Limitdeviations;Materials;Measurement;Octagons;Pipes;Poles;Rectangulartubes;Rectangularity;Squaretubes;Straightness;Straightnessmeasurement;Tolerances(measurement);Twisting;Wallthicknesses;Width;Widthacrossflats
【摘要】:Twogradesofaluminiumandsevenaluminiumalloys.
【中国标准分类号】:H61
【国际标准分类号】:77_150_10
【页数】:12P.;A4
【正文语种】:英语
【英文标准名称】:ClassificationofClassIHazardous(Classified)LocationsforElectricalInstallationsinChemicalProcessAreas
【原文标准名称】:化学处理区域中电气装置用1级危险场所的分类
【标准号】:ANSI/NFPA497A-1992
【标准状态】:作废
【国别】:美国
【发布日期】:1992
【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】:安全要求;电驱动装置;安全工程;化学设备
【英文主题词】:safetyengineering;electrically-operateddevices;safetyrequirements;chemicalequipment
【摘要】:
【中国标准分类号】:K04
【国际标准分类号】:13_300;29_260_20
【页数】:
【正文语种】:英语
【英文标准名称】:StandardPracticeforIntegrityTestingofWaterFiltrationMembraneSystems
【原文标准名称】:水过滤膜系统的完整性测试的标准实施规程
【标准号】:ASTMD6908-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D19.08
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:过滤;完整性;薄膜材料;试验;水
【英文主题词】:continuousmonitoring;integrity;membrane;multiplexing;pressuredecay;solubledyetest;TOCtest;vacuumdecay
【摘要】:Theintegritytestmethodsdescribedareusedtodeterminetheintegrityofmembranesystems,andareapplicabletosystemscontainingmembranemoduleconfigurationsofbothhollowfiberandflatsheet;suchas,spiral-woundconfiguration.InallcasesthepracticesapplytomembranesintheRO,NF,andUFmembraneclasses.However,theTOCandDyeTestpracticesdonotapplytomembranesintheMFrangeortheupperendoftheUFporesizerange(0.01x03BC;mandlargerporesizes)duetoinsignificantorinconsistentremovalofTOCmaterialbythesemembranes.Thesemethodsmaybeusedtoidentifyrelativechangesintheintegrityofasystem,orusedinconjunctionwiththeequationsdescribedin9.4,toprovideameansofestimatingtheintegrityintermsoflogreductionvalue.Forcriticalapplications,estimatedlogreductionsusingtheseequationsshouldbeconfirmedbyexperimentfortheparticularmembraneandsystemconfigurationused.Theabilityofthemethodstodetectanygivendefectisaffectedbythesizeofthesystemorportionofthesystemtested.Selectingsmallerportionsofthesystemtotestwillincreasethesensitivityofthetesttodefects.Whendeterminingthesizethatcanbetestedasadiscreteunit,usetheguidelinessuppliedbythesystemmanufacturerorthegeneralguidelinesprovidedinthisstandard.Theapplicabilityofthetestsislargelyindependentofsystemsizewhenmeasuredintermsoftheimpactofdefectsonthetreatedwaterquality(thatis,thesystemLRV).Thisisbecausethebypassflowfromanygivendefectisdilutedinproportiontothesystemstotalflowrate.Forexample,a10-modulesystemwithasingledefectwillproducethesamewaterqualityasa100-modulesystemwithtenofthesamesizedefects.1.1Thispracticecoversthedeterminationoftheintegrityofwaterfiltrationmembraneelementsandsystemsusingairbasedtests(pressuredecayandvacuumhold),solubledye,continuousmonitoringparticulatelightscattertechniques,andTOCmonitoringtestsforthepurposeofrejectingparticlesandmicrobes.Thetestsareapplicabletosystemswithmembranesthathaveanominalporesizelessthanabout1m.TheTOC,andDye,testsaregenerallyapplicabletoNFandROclassmembranesonly.1.2Thispracticedoesnotpurporttocoverallavailablemethodsofintegritytesting.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:J77
【国际标准分类号】:13_060_01
【页数】:20P.;A4
【正文语种】:
