DIN 1652-3-1990 银亮钢.交货技术条件.渗碳银亮钢
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来源:标准资料网
【英文标准名称】:Brightsteelmadefromcasehardeningsteel;technicaldeliveryconditions
【原文标准名称】:银亮钢.交货技术条件.渗碳银亮钢
【标准号】:DIN1652-3-1990
【标准状态】:作废
【国别】:德国
【发布日期】:1990-11
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:热处理钢;试验;钢;材料;检验;作标记;光亮钢;结构钢;规范(审批);表面硬化钢;名称与符号;特性;交货条件;半成品;化学成份;验收规范
【英文主题词】:
【摘要】:
【中国标准分类号】:H40
【国际标准分类号】:77_140_10
【页数】:6P;A4
【正文语种】:德语
基本信息
| 标准名称： | 卧式矩形压力蒸汽消毒器型式基本参数和尺寸 |
| 替代情况： | WS 2-232-1983 |
| 发布日期： | |
| 实施日期： | 1988-11-01 |
| 首发日期： | |
| 作废日期： | 2006-05-15 |
| 出版日期： | |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 医药 卫生 劳动保护 医疗器械 医用光学仪器设备与内窥镜
【英文标准名称】:Cathodicprotectionforfixedsteeloffshorestructures
【原文标准名称】:海上固定钢结构的阴极保护
【标准号】:BSEN12495-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-05-15
【实施或试行日期】:2000-05-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:海水;电流的;表面防护;近海建设工程;水下建筑工程;交付使用;电解镀层;覆层;阳极;监督(认可);阴极保护;钢;钢结构;近海工程;文献工作;安装;防腐蚀;定义;安全;材料
【英文主题词】:
【摘要】:ThisEuropeanStandarddefinesthemeanstobeusedtocathodicallyprotectthesubmergedareasoffixedsteeloffshorestructuresandappurtenances.1StructuralpartsThisEuropeanStandarddefinestherequirementsforthecathodicprotectionoffixedstructures,includingsubseaproductionandrelatedprotectivestructureswhetherconnectedornottoeachotherbypipelinesand/orwalkways.Italsocoversthesubmergedareasofappurtenancesattachedtothestructure,whentheseareelectricallyconnectedtothestructure.Itdoesnotcoverthecathodicprotectionoffloatingstructuressuchasships,semi-submersibleunits,orelongatedstructuressuchaspipelinesorcables.ThisEuropeanStandardconcernsonlythecathodicprotectionofexternalsurfaces,incontactwiththeseawaterorwiththeseabed.Itcoverstheimmersedorburiedexternalsurfacesofthejacket,conductorpipes,wellcasings,piles,J-tubes,productionorutilityrisers,etc.Itdoesnotcoverthecorrosionprotectionofthesectionsofthestructureabovethesealevel,i.e.thesplashzoneandatmosphericzone.Thisstandarddoesnotincludetheinternalprotectionofanycomponentssuchasjacketmembers,legs,conductorpipes;theprotectionoftheseisoftenperformedusingchemicals.2MaterialsThisEuropeanStandardcoversthecathodicprotectionofbareorcoatedsteelswithaspecifiedminimumyieldstrength(S.M.Y.S.)notexceeding500N/mm.2.1OverpolarizationandhighstrengthsteelsIfthepotentialofthestructurebecomestoonegativethestructurewillbecomeoverpolarizedandthiscaninduceapenetrationofhydrogenintothesteelwall,resultinginembrittlementofthemetal,andsubsequentlyapossibledetrimentaleffect,includingpropagationofcracks.Asageneralindicationthehigherthetensileproperties,thegreateristheriskofhydrogeninduceddamage.However,materialhardnessandmicrostructurearealsoimportant.Thesephenomenacanoccuronconventionalsteelsusedforoffshorefixedstructures(gradeS355asperEN10025)atpotentialsmorenegativethan-1,10Vvs.Ag/AgCl/seawater.Relevanttestsshouldbeperformedfortheuseofcathodicprotectionoutsidetheselimits.2.2GalvaniccouplingSomepartsofthestructurecanbemadeofmetallicmaterialsotherthancarbonmanganesesteel.Thecathodicprotectionsystemshouldbedesignedtoensurethatthereiscompletecontroloveranygalvaniccorrosionarisingfromthiscoupling.3EnvironmentThisEuropeanStandardisapplicableforthewholesubmergedzoneinanykindofseawaterorseabed.Forsurfaceswhicharealternatelyimmersedandexposedtotheatmosphere,thecathodicprotectionisonlyeffectivewhentheimmersiontimeissufficientlylongforthesteeltobecomepolarized.Thisisthecaseonaboutthelowestthirdpartofthetidalzone.Adifferentmethodofcorrosionprotectionshallbethereforeusedfortheprotectionofthewettedsurfacelocatedabovethislevel,i.e.byusingaprotectivecoating,cladding,sheathingorincreasingthethicknessofthestructuralmaterial.
【中国标准分类号】:A29
【国际标准分类号】:47_020_05;77_060
【页数】:36P;A4
【正文语种】:英语
