ISO 1129-1980 锅炉、过热器和热交换器用钢管尺寸、公差和单位常用重量
作者:标准资料网 时间:2024-05-14 08:10:01 浏览:9352
来源:标准资料网
【英文标准名称】:Steeltubesforboilers,superheatersandheatexchangers;Dimensions,tolerancesandconventionalmassesperunitlength
【原文标准名称】:锅炉、过热器和热交换器用钢管尺寸、公差和单位常用重量
【标准号】:ISO1129-1980
【标准状态】:现行
【国别】:国际
【发布日期】:1980-03
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC5
【标准类型】:()
【标准水平】:()
【中文主题词】:钢管;奥氏体钢;尺寸公差;厚度;铁素体钢;管道工程系统;锅炉管;管路;马氏体钢;蒸汽工程;尺寸;直径;线密度;非合金钢;不锈钢
【英文主题词】:Austeniticsteels;Boilertubes;Diameter;Dimensionaltolerances;Dimensions;Ferriticsteels;Lineardensity;Martensiticsteels;Pipeworksystems;Stainlesssteels;Steamengineering;Steelpipes;Thermalenvironmentsystems;Thickness;Unalloyedsteels
【摘要】:Thissecondeditioncancelsandreplacesthefirstedition(1977).Specifiesthediameters,thicknesses,tolerancesandmassesperunitlengthoffiredtubes,includingsuperheaterandheatexchangertubes.Itdoesnotapplyf乺tubesaccordingtoISO6758andISO6759.Tabulatescarbonandalloysteeltubes(table1),austeniticstainlesssteeltubes(table2,ferriticandmartensiticsteeltubes(table3)).
【中国标准分类号】:H48
【国际标准分类号】:23_040_10
【页数】:4P.;A4
【正文语种】:英语
【英文标准名称】:Protectionagainstlightning-Part4:Electricalandelectronicsystemswithinstructures(IEC62305-4:2010,modified);GermanversionEN62305-4:2011
【原文标准名称】:防雷保护.第4部分:结构物内的电力及电子系统(IEC62305-4-2010,修改版);德文版本EN62305-4-2011
【标准号】:EN62305-4-2011
【标准状态】:现行
【国别】:
【发布日期】:2011-10
【实施或试行日期】:2011-10-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Braidshieldings;Buildings;Definitions;Electricalengineering;Electricalequipment;Electricalinstallations;Electronicengineering;Electronicequipment;Lightningconductors;Lightningprotection;Lightningprotectionsystems;Maintenance;Materials;Overvoltageprotection;Potentialequalization;Protectivemeasures;Safetyengineering;Specification(approval);Structuralworks;Testing
【摘要】:
【中国标准分类号】:K49
【国际标准分类号】:91_120_40
【页数】:93P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforCharacterizingtheEffectofExposuretoEnvironmentalCyclingonThermalPerformanceofInsulationProducts
【原文标准名称】:暴露于环境循环对绝缘产品热性能特征影响的标准试验方法
【标准号】:ASTMC1512-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:C16.33
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:环境测试;曝露;绝缘;污染控制;试验方法;热分析;绝热材料;隔热;热应力
【英文主题词】:environmentalcycling;thermalinsulation
【摘要】:Exposingaspecimentoconditionsofone-directionalenvironmentalcyclingcanincreaseitsmoisturecontentuntiladecreaseinmaterialpropertiesoccurs(ataspecificnumberofcycles).Suchatestcouldbeinappropriateduetothenumberofcyclesrequiredtocauseadecreaseinmaterialpropertiessinceproductperformanceissuesoftenariseonlyaftermanyyearsofexposure.Theuseofapreconditioningprocedureisnotintendedtoduplicateexpectedfieldperformance.Ratherthepurposeistoincreasethemoisturecontentoftestmaterialspriortosubjectingtothemtoenvironmentalcycling.Themostimportantaspectofthepreconditioningprocedureisnon-uniformmoisturedistributioninthespecimen.Theheatflowisonedirectionalcausingmoistureflowtowardsthecoldsideresultinginzonesofdrymaterialonthewarmsideandhighmoisturecontentonthecoldside.(Whetherthehighmoisturecontentzoneislocatedrightatthecoldsurfaceofthespecimenoratsomedistancefromthissurfacedependsupontemperatureoscillationandabilityofthecoldsurfacetodryoutwards).Becausethepreconditioningprocedureinvolvesthermalgradient,thispreconditioningprocedureresultsinadistributionofmoisturecontentthatmayoccurunderfieldexposureconditions.However,theresultingmoisturecontentmaydiffersignificantlyfromthatwhichmaybedemonstratedintypicalproductapplications.Thepreconditioningresultsinaccumulationofmoistureinthethermalinsulationresultingfromthesimultaneousexposuretoadifferenceintemperatureandwatervaporpressure.Thistestmethodisnotintendedtoduplicatefieldexposure.Itisintendedtoprovidecomparativeratings.Asexcessiveaccumulationofmoistureinaconstructionsystemmayadverselyaffectitsperformance,thedesignershouldconsiderthepotentialformoistureaccumulationandthepossibleeffectsofthismoistureonthesystemperformance.1.1Thistestmethodisapplicabletopreformedorfieldmanufacturedthermalinsulationproducts,suchasboardstockfoams,rigidfibrousandcompositematerialsmanufacturedwithorwithoutprotectivefacings.SeeNote0Thistestmethodisnotapplicabletohightemperature,reflectiveorloosefillinsulation.Note0Iftheproductismanufacturedwithafacer,testproductwithfacerinplace.1.2Thistestmethodinvolvestwostages:preconditioningandenvironmentalcycling.Duringthefirststage,25mm(1in.)thickspecimensareusedtoseparatetwoenvironments.Eachoftheseenvironmentshasaconstantbutdifferenttemperatureandhumiditylevel.Duringtheenvironmentalcyclingstage,specimensalsodividetwoenvironmentsnamelyconstantroomtemperature/humidityononesideandcyclingtemperature/ambientrelativehumidityontheotherside.1.3Thistestmethodmeasurestheabilityoftheproducttomaintainthermalperformanceandcriticalphysicalattributesafterbeingsubjectedtostandardizedexposureconditions.Acomparisonismadebetweenmaterialpropertiesforreferencespecimensstoredinthelaboratoryforthetestperiodandspecimenssubjectedtothetwo-stagetestmethod.Toeliminatetheeffectofmoisturefromthecomparison,thematerialpropertiesofthelattertestspecimensaredeterminedaftertheyhavebeendriedtoconstantweight.Theaveragevaluedeterminedforeachofthetwosetsofspecimensisusedforcomparison.1.4Differentpropertiescanbemeasuredtoassesstheeffectofenvironmentalfactorsonthermalinsulation.Thistestmethodrequiresthatthermalresistancebedeterminedbaseduponanaverageforthreespecimensmeasuredaftercompletingthetest.Secondaryelementsofthistestmethodincludevisualobservationssuchascracking,delaminationorothersurfacedefects,aswellasthechangeinmoisturecontentaftereachofthetwostagesofexposur......
【中国标准分类号】:K15
【国际标准分类号】:13_020_60
【页数】:5P.;A4
【正文语种】:
