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UL 1149-1994 船用低压照明设备

作者:标准资料网 时间:2024-05-06 04:54:36  浏览:8368   来源:标准资料网
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【英文标准名称】:Lowvoltagemarinelightingfixtures
【原文标准名称】:船用低压照明设备
【标准号】:UL1149-1994
【标准状态】:作废
【国别】:美国
【发布日期】:1994-05-25
【实施或试行日期】:
【发布单位】:美国保险商实验所(US-UL)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:小艇;防腐蚀;电气安全;防火;危害;照明工程;光;照明系统;低电压;导航;安全要求;船舶;规范(验收);测试;快艇
【英文主题词】:Boats;Corrosionprotection;Electricalsafety;Fireprotection;Hazards;Illuminationengineering;Light;Lightingsystems;Lowvoltage;Navigation;Safetyrequirements;Ships;Specification(approval);Testing;Yachts
【摘要】:1.1(nominally)orlessusinganACorDCsourceofpower.Theserequirementsapplytoincandescentandfluorescentmarinelightingfixturesrated36volts1.2ThelightingfxturescoveredbytheserequirementsareintendedforinstallationanduseinaccordancewiththeapplicablerequirementsoftheU.S.CoastGuard,thestandardsoftheAmericanBoatandYachtCouncil,Inc.,andtheStandardforFireProtectionofPleasureandCommercialMotorcraf?,NFPA302.1.3intheUnitedStatesCoastGuardElectricalEngineeringRegulations.Theserequirementsdonotcovermarinelightingfixturesforuseinhazardouslocationsasdefined1.4Theserequirementsalsodonotcovernavigationlights,floatingwaterlights,oremergencylights.1.5Aproductthatcontainsfeatures,characteristics,components,materials,orsystemsnewordifferentfromthosecoveredbytherequirementsinthisStandard,andthatinvolveariskoffire,electricshock,orinjurytopersonsshallbeevaluatedusingtheappropriateadditionalcomponentandend-productrequirementsasdeterminednecessarytomaintaintheacceptablelevelofsafetyasoriginallyanticipatedbytheintentofthisStandard.Aproductwhosefeatures,characteristics,components,materials,orsystemsconflictwithspecificrequirementsorprovisionsofthisStandardcannotbejudgedtocomplywiththisStandard.Whereconsideredappropriate,revisionofrequirementsmaybeproposedandadoptedinconformancewiththemethodsemployedfordevelopment,revision,andimplementationofthisStandard.
【中国标准分类号】:U63
【国际标准分类号】:47_020_60
【页数】:28P.;A4
【正文语种】:英语


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基本信息
标准名称:食品卫生微生物学检验 双歧杆菌检验
英文名称:Microbiological examination of food hygiene—Examination of Bifidobacterium
中标分类: 医药、卫生、劳动保护 >> 卫生 >> 食品卫生
ICS分类: 数学、自然科学 >> 微生物学 >>
替代情况:被GB/T 4789.34-2008代替
发布部门:中华人民共和国卫生部 中国国家标准化管理委员会
发布日期:2003-08-11
实施日期:2004-01-01
首发日期:2003-08-11
作废日期:2009-03-01
主管部门:卫生部
提出单位:中华人民共和国卫生部
归口单位:中华人民共和国卫生部
起草单位:中国疾病预防控制中心营养与食品安全所
起草人:杨宝兰、冉陆、李志刚、王淑真、杨大进、贾珍珍
出版社:中国标准出版社
出版日期:2004-01-01
页数:10页
适用范围

本标准规定了双歧杆菌的检验方法。本标准适用于食品中双歧杆菌的检验。

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所属分类: 医药 卫生 劳动保护 卫生 食品卫生 数学 自然科学 微生物学
【英文标准名称】:StandardTestMethodforPredictingLong-TermThermalResistanceofClosed-CellFoamInsulation
【原文标准名称】:预测闭孔绝缘泡沫的长期热电阻的标准试验方法
【标准号】:ASTMC1303/C1303M-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:C16.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aging;long-termthermalresistance;LTTR;rigidclosed-cellplasticfoams;scalingfactors;thermalinsulation;thermalresistance;time-averagedthermalresistance;Agingresistance;Controlledtestingconditions/environments;Foamed-in-placethermalin
【摘要】:Rigidgas-filledclosed-cellfoaminsulationsincludeallcellularplasticinsulationswhichrelyonablowingagent(orgas),otherthanair,forthermalresistancevalues.Atthetimeofmanufacture,thecellsofthefoamusuallycontaintheirhighestpercentageofblowingagentandthelowestpercentageofatmosphericgases.Astimepasses,therelativeconcentrationsofthesegaseschangedueprimarilytodiffusion.Thisresultsinageneralreductionofthethermalresistanceofthefoamduetoanincreaseinthethermalconductivityoftheresultantcellgasmixture.Thesephenomenaaretypicallyreferredtoasfoamaging.Forsomerigidgas-filledclosed-cellfoaminsulationproductsproducedusingblowingagentgasesthatdiffuseveryrapidlyoutofthefull-thicknessfoamproduct,suchasexpandedpolystyrene,thereisnoneedtoacceleratetheagingprocess.5.1.2Physicalgasdiffusionphenomenaoccurinthreedimensions.Theone-dimensionalformofthediffusionequationsusedinthedevelopmentofthispracticearevalidonlyforplanargeometries,thatis,forspecimensthathaveparallelfacesandwherethethicknessismuchsmallerthanthewidthandmuchsmallerthanthelength.Note28212;PleaseseeAppendixX3foradiscussionofthetheoryofacceleratedagingviathinslicing.Note38212;Theoreticalandexperimentalevaluationsoftheagingofinsulationinradialforms,suchaspipeinsulation,havebeenmade.(6)However,thesepracticeshavenotevolvedtothepointofinclusionintheteststandard.Thechangeinthermalresistanceduetothephenomenadescribedin5.1usuallyoccursoveranextendedperiodoftime.Informationregardingchangesinthethermalresistanceofthesematerialsasafunctionoftimeisrequiredinashorterperiodoftimesothatdecisionsregardingformulations,production,andcomparisonswithothermaterialscanbemade.SpecificationsC578,C591,C1029,C1126andC1289onrigidclosed-cellfoamsmeasurethermalresistanceafterconditioningat23x00B1;1x00B0;C[73x00B1;2x00B0;F]for180x00B1;5daysfromthetimeofmanufactureorat60x00B1;1x00B0;C[140x00B1;2x00B0;F]for90days.Thisconditioningcanbeusedforcomparativepurposes,butisnotsufficienttodescribelong-termthermalresistance.Thisrequirementdemonstratestheimportanceoftheagingphenomenawithinthisclassofproducts.ThePrescriptiveMethodinPartAprovideslong-termthermalresistancevaluesonaconsistentbasisforavarietyofpurposes,includingproductevaluation,specifications,orproductcomparisons.Theconsistentbasisforthesepurposesisprovidedbyaseriesofspecificproceduralconstraints,whicharenotrequiredintheResearchMethoddescribedinPartB.ThevaluesproducedbythePrescriptiveMethodcorrespondtothethermalresistanceatanageoffiveyears,whichcorrespondscloselytotheaveragethermalresistanceovera15-yearservicelife(7,8).Itisrecommendedthatanymaterialstan......

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