ANSI/NFPA 497-2011 化学品生产场所易燃液体、气体或水蒸气和电气装置危险位置的分类用推荐实施规程

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【英文标准名称】:RecommendedPracticefortheClassificationofFlammableLiquids,Gases,orVaporsandofHazardous(Classified)LocationsforElectricalInstallationsinChemicalProcessAreas
【原文标准名称】:化学品生产场所易燃液体、气体或水蒸气和电气装置危险位置的分类用推荐实施规程
【标准号】:ANSI/NFPA497-2011
【标准状态】:现行
【国别】:美国
【发布日期】:2011-01-01
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Chemicalequipment;Electrically-operateddevices;Safetyengineering;Safetyrequirements
【摘要】:1.1Scope.1.1.1Thisrecommendedpracticeappliestothoselocationswhereflammablegasesorvapors,flammableliquids,orcombustibleliquidsareprocessedorhandled;andwheretheirreleaseintotheatmospherecouldresultintheirignitionbyelectricalsystemsorequipment.1.1.2Thisrecommendedpracticeprovidesinformationonspecificflammablegasesandvapors,flammableliquids,andcombustibleliquidswhoserelevantcombustionpropertieshavebeensufficientlyidentifiedtoallowtheirclassificationintothegroupsestablishedbyNFPA70,NationalElectricalCode(NEC),forproperselectionofelectricalequipmentinhazardous(classified)locations.Thetablesofselectedcombustiblematerialscontainedinthisdocumentarenotintendedtobeall-inclusive.1.1.3Thisrecommendedpracticeappliestochemicalprocessareas.Asusedinthisdocument,achemicalprocessareacouldbealarge,integratedchemicalprocessplantoritcouldbeapartofsuchaplant.Itcouldbeapartofamanufacturingfacilitywhereflammablegasesorvapors,flammableliquids,orcombustibleliquidsareproducedorusedinchemicalreactions,orarehandledorusedincertainunitoperationssuchasmixing,filtration,coating,spraying,anddistillation.1.1.4Thisrecommendedpracticedoesnotapplytosituationsthatcouldinvolvecatastrophicfailureoforcatastrophicdischargefromprocessvessels,pipelines,tanks,orsystems.1.1.5Thisrecommendedpracticedoesnotaddresstheuniquehazardsassociatedwithexplosives,pyrotechnics,blastingagents,pyrophoricmaterials,oroxygen-enrichedatmospheresthatmightbepresent.
【中国标准分类号】:C67
【国际标准分类号】:13_300;29_260_20
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