【英文标准名称】:Classificationofenvironmentalconditions-Part3:Classificationofgroupsofenvironmentalparametersandtheirseverities-Section4:Stationaryuseatnon-weatherprotectedlocations
【原文标准名称】:环境条件分类第3部分:环境参数组及其严酷程度的分类分级第4节:在无气侯防护场所的固定使用
【标准号】:IEC60721-3-4-1995
【标准状态】:现行
【国别】:国际
【发布日期】:1995-01
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC104
【标准类型】:()
【标准水平】:()
【中文主题词】:电气器具;环境条件;分类;抗风化能力;电气工程
【英文主题词】:Atmosphericinfluences;Biological;Chemical;Chemicalproperties;Classes;Classification;Climate;Definitions;Electricappliances;Electricalengineering;Environment;Environmentalconditions;Environmentalfactorofinfluence;Ergonomics;Limits(mathematics);Mechanic;Mechanicalproperties;Stationary;Weather;Weatherresistance
【摘要】:ThissectionofIEC721-3classifiesgroupsofenvironmentalparametersandtheirseveritiestowhichproductsaresubjectedwhenmountedforstationaryuseatlocationswhicharenon-weatherprotected,includingperiodsoferectionwork,downtime,maintenanceandrepair.Locationswhicharenon-weatherprotected,whereproductsmaybemountedforstationaryusepermanentlyortemporarily,includeland-basedandoffshorelocations.Useinandonvehiclesisexcepted.Theenvironmentalconditionsspecifiedinthisstandardarelimitedtothosewhichmaydirectlyaffecttheperformanceofproducts.Onlyenvironmentalconditionsassuchareconsidered.Nospecialdescriptionoftheeffectsoftheseconditionsontheproductsisgiven.Environmentalconditionsdirectlyrelatedtofireorexplosionhazardsandconditionsrelatedtoionizingradiationareexcluded.Anyotherunforeseenincidentsarealsoexcluded.Thepossibilityoftheiroccurrenceshouldbetakenintoaccountinspecialcases.Microclimatewithinaproductisnotincluded.Conditionsofstationaryuseatweatherprotectedlocations,portableandnon-stationaryuse,useinvehiclesandships,andconditionsofstorageandtransportationaregiveninothersectionsofIEC721-3.Alimitednumberofclassesofenvironmentalconditionsisgiven,coveringabroadfieldofapplication.Theuserofthisstandardshouldselectthelowestclassificationnecessaryforcoveringtheconditionsoftheintendeduse.SomeguidanceforthisisgiveninannexA.
【中国标准分类号】:A21
【国际标准分类号】:19_040
【页数】:53P;A4
【正文语种】:英语


【英文标准名称】:Aluminiumandaluminiumalloys.Colddrawnrod/barandtube.Part8:portholetubes,tolerancesondimensionsandform.
【原文标准名称】:铝及铝合金.冷拔棒材/条材和管材.第8部分:多孔拉拔管尺寸和形状公差
【标准号】:NFA50-617-1998
【标准状态】:作废
【国别】:法国
【发布日期】:1998-11-01
【实施或试行日期】:1998-11-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:宽度;测量;尺寸;高度;八角形的;方形管;挤压的;极限偏差;材料;竿材;管;铝;铝管;矩形管;壁厚;固定长度;直线度测量;圆管;凹形;直径;铝合金;挤压成型;形状公差;拉拔;对边宽度;平直度;加捻;公差(测量);矩形性;长度;凸形;隆起;六角(边)形
【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】:
【中国标准分类号】:H61
【国际标准分类号】:77_150_10
【页数】:14P.;A4
【正文语种】:其他