BS 7319-3-1990 工业用氯化钠的分析方法.第3部分:水或酸不溶物质的测定方法

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【英文标准名称】:Aerospaceseries-Connectors,electrical,circular,coupledbythreadedring,fire-resistantornonfire-resistant,operatingtemperatures-65°Cto175°Ccontinuous,200°Ccontinuous,260°Cpeak-Protectivecoverforreceptacle-Productstandard
【原文标准名称】:航空航天系列.连续使用温度为65℃～175℃,200℃,最高260℃用螺纹环连接的耐火或非耐火圆形电连接器.插座的防护盖.产品标准
【标准号】:BSEN2997-009-2010
【标准状态】:现行
【国别】:英国
【发布日期】:2010-07-31
【实施或试行日期】:2010-07-31
【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】:航空航天运输;航空运输;圆形连接器;连接设备;名称与符号;尺寸规格;电连接器;电插头;电气工程;法兰;作标记;特性;保护罩;护罩;螺栓联结器;航天运输;规范(验收);塞子
【英文主题词】:Aerospacetransport;Airtransport;Circularconnectors;Connectingdevices;Designations;Dimensions;Electricconnectors;Electricplugs;Electricalengineering;Flanges;Marking;Properties;Protectionlids;Protectivecaps;Screwcouplings;Spacetransport;Specification(approval);Stoppers
【摘要】:ThisEuropeanStandardspecifiesthecharacteristicsofprotectivecoversforreceptaclesinthefamilyofcircularelectricalconnectorscoupledbythreadedring.ItappliestotheclassdefinedinTable2.Forreceptaclesassociatedwiththeseprotectivecovers,seeEN2997-003toEN2997-007.
【中国标准分类号】:V25
【国际标准分类号】:49_060
【页数】:12P.;A4
【正文语种】:英语


【英文标准名称】:StandardGuideforInstallationofDirectPushGroundWaterMonitoringWells
【原文标准名称】:直接推动式地下水监测井安装的标准指南
【标准号】:ASTMD6724-2004(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:D18.21
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:directpush;groundwater;monitoringwell;siteinvestigatio;Directpushsampling;Drivenwellpoint;Environmentalsiteassessment(ESA);Ground-watermonitoring/sampling;Installation--groundwater/subsurfacedevices/applications;Jelledwellpoint;Pr
【摘要】:Thedirectpushgroundmethodisarapidandeconomicalprocedureforinstallinggroundwatermonitoringwellstoobtainrepresentativegroundwatersamplesandlocation-specifichydrogeologicmeasurements.Directpushinstallationsmayofferanadvantageoverconventionalrotarydrilledmonitoringwells(PracticeD5092)forgroundwaterinvestigationsinunconsolidatedformationsbecausetheyreducedisturbancetotheformation,andeliminateorminimizedrillcuttings.Atfacilitieswherecontaminatedsoilsarepresent,thiscanreducehazardexposureforoperators,localpersonnel,andtheenvironment,andcanreduceinvestigativederivedwastes.Additionally,smallerequipmentcanbeusedforinstallation,providingbetteraccesstoconstrictedlocations.Directpushmonitoringwellsgenerallydonotextendtodepthsattainablebydrilling.Theyarealsotypicallysmallerindiameterthandrilledwells,therebyreducingpurgewatervolumes,samplingtime,andinvestigativederivedwastes.PracticeD5092monitoringwellsareusedwhenlargerdiametersand/orsamplevolumesarerequired,oratdepthstowhichitisdifficulttoinstalldirectpushwells.Directpushmonitoringwellsshouldbeviableformonitoringformanyyears.Priortoconstructionandinstallationofadirectpushwelloranyothertypeofgroundwaterwellthereadershouldconsultappropriatelocalandstateagenciesregardingregulatoryrequirementsforwellconstructioninthestate.Aregulatoryvariancemayberequiredforinstallationofdirectpushmonitoringwellsinsomestates.Todate,publishedcomparisonstudiesbetweendrilledmonitoringwellsanddirectpushmonitoringwellshaveshowncomparability(1,2,3,4,5).However,selectionofdirectpushmonitoringwellsoverconventionalrotarydrilledwellsshouldbebasedonseveralcriteria,suchassiteaccessibilityandpenetrability,stratigraphicstructure,depthtogroundwater,andaquifertransmissivity.Typicalpenetrationdepthsforinstallationofgroundwatermonitoringwellswithdirectpushequipmentdependonmanyvariables.Someofthevariablesarethesizeandtypeofthedrivingsystem,diameterofthedriverodsandmonitoringwell,andtheresistanceoftheearthmaterialsbeingpenetrated.Somedirectpushsystemsarecapableofinstallinggroundwatermonitoringwellstodepthsinexcessof100feet,andlargerdirectpushequipment,suchasthevibratorysonictypedrill(GuideD6286)arecapableofreachingmuchgreaterdepths,sometimesinexcessof400ft.However,installationdepthsof10to50feetaremostcommon.Directpushmethodscannotbeusedtoinstallmonitoringwellsinconsolidatedbedrock(forexample,granite,limestone,gneiss),butareintendedforinstallationinunconsolidatedmaterialssuchasclays,silts,sands,andsomegravels.Additionally,depositscontainingsignificantcobblesandboulders(forexample,someglacialdeposits),orstronglycementedmaterials(forexample,caliche)arelikelytohinderorpreventpenetrationtothedesiredmonitoringdepth.Fordirectpushmethodstoprovideaccurategroundwatermonitoringresults,precautionsmustbetakentoensurethatcross-contaminationbyx201C;smearingx201D;orx201C;drag-downx201D;(thatis,drivingshallowcontaminationtodeeperlevels)doesnotoccur,andthathydraulicconnectionsbetweenotherwiseisolatedwaterbearingstrataarenotcreated.Similarprecautionsasthoseappliedduringconventional..........
【中国标准分类号】:P13
【国际标准分类号】:13_060_10
【页数】:9P.;A4
【正文语种】:英语