热门站点| 世界资料网 | 专利资料网 | 世界资料网论坛
收藏本站| 设为首页| 首页

BS EN 60893-3-2-2004 绝缘材料.电工用热固性树脂基工业硬质层压薄板.单项材料规范.环氧树脂基硬质层压薄板要求

作者:标准资料网 时间:2024-05-12 19:23:30  浏览:9865   来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:Insulatingmaterials-Industrialrigidlaminatedsheetsbasedonthermosettingresinsforelectricalpurposes-Specificationsforindividualmaterials-Requirementsforrigidlaminatedsheetsbasedonepoxyresins
【原文标准名称】:绝缘材料.电工用热固性树脂基工业硬质层压薄板.单项材料规范.环氧树脂基硬质层压薄板要求
【标准号】:BSEN60893-3-2-2004
【标准状态】:现行
【国别】:英国
【发布日期】:2004-02-26
【实施或试行日期】:2004-02-26
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:材料;电气工程;特性;规范(验收);塑料;薄板材;规范;尺寸;型式;板条;公差(测量);层压薄板;树脂;名称与符号;可固化的;额定值;固体绝缘材料;型式列表;极限偏差;表(数据);绝缘树脂;材料数据;分类系统;叠层板材;厚度;电绝缘材料;人造树脂;环氧树脂;热固性聚合物;作标记
【英文主题词】:Artificialresins;Classificationsystems;Curable;Designations;Dimensions;Electricalengineering;Electricalinsulatingmaterials;Epoxyresins;Insulatingresins;Laminatedsheets;Laminates;Limitdeviations;Marking;Materials;Materialsdata;Panels;Plastics;Properties;Ratings;Resins;Sheets;Solidelectricalinsulatingmaterials;Specification;Specification(approval);Tables(data);Thermosettingpolymers;Thickness;Tolerances(measurement);Typelists;Types
【摘要】:ThispartofIEC60893givestherequirementsforindustrialrigidlaminatedsheetsforelectricalpurposesbasedonepoxyresinsanddifferentreinforcements.ApplicationsanddistinguishingpropertiesaregiveninTable1.Materialswhichconformtothisspecificationmeetestablishedlevelsofperformance.However,theselectionofamaterialbyauserforaspecificapplicationshouldbebasedontheactualrequirementsnecessaryforadequateperformanceinthatapplicationandnotbasedonthisspecificationalone.
【中国标准分类号】:K15
【国际标准分类号】:29_035_20
【页数】:18P;A4
【正文语种】:英语


下载地址: 点击此处下载
【英文标准名称】:StandardPracticeforInSituElectromagnetic(Eddy-Current)ExaminationofNonmagneticHeatExchangerTubes
【原文标准名称】:非磁性换热管现场电磁(涡流)检验的标准实施规程
【标准号】:ASTME690-2010
【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】:E07.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:eddy-current;electromagnetic;NDT;nondestructivetesting;Condenserandheatexchangersystems;Curietemperature;Eddycurrentexamination;Electromagnetic(eddycurrent)testing;Nonmagneticheatexchangertubes
【摘要】:Eddy-currentexaminationisanondestructivemethodoflocatingdiscontinuitiesintubingmadeofmaterialsthatconductelectricity.Signalscanbeproducedbydiscontinuitieslocatedeitherontheinneroroutersurfacesofthetube,orbydiscontinuitiestotallycontainedwithinthetubewall.Whenusinganinternalprobe,thedensityofeddycurrentsinthetubewalldecreasesveryrapidlyasthedistancefromtheinternalsurfaceincreases;thustheamplitudeoftheresponsetooutersurfacediscontinuitiesdecreasescorrespondingly.Someindicationsobtainedbythismethodmaynotberelevanttoproductquality.Forexample,anirrelevantsignalmaybecausedbymetallurgicalormechanicalvariationsthataregeneratedduringmanufacturebutthatarenotdetrimentaltotheenduseoftheproduct.Irrelevantindicationscanmaskunacceptablediscontinuitiesoccurringinthesamearea.Relevantindicationsarethosethatresultfromnonacceptablediscontinuities.Anyindicationabovetherejectlevel,whichisbelievedtobeirrelevant,shallberegardedasunacceptableuntilitisproventobeirrelevant.Fortubinginstalledinheatexchangers,predictablesourcesofirrelevantindicationsarelands(shortunfinnedsectionsinfinnedtubing),dents,scratches,toolchattermarks,orvariationsincoldwork.Rollingtubesintothesupportsmayalsocauseirrelevantindications,asmaythetubesupportsthemselves.Eddy-currentexaminationsystemsaregenerallynotabletoseparatetheindicationgeneratedbytheendofthetubefromindicationsofdiscontinuitiesadjacenttotheendsofthetube(endeffect).Therefore,thisexaminationmaynotbevalidattheboundariesofthetubesheets.1.1Thispracticedescribesprocedurestobefollowedduringeddy-currentexamination(usinganinternal,probe-type,coilassembly)ofnonmagnetictubingthathasbeeninstalledinaheatexchanger.Theprocedurerecognizesboththeuniqueproblemsofimplementinganeddy-currentexaminationofinstalledtubing,andtheindigenousformsoftube-walldeteriorationwhichmayoccurduringthistypeofservice.Thedocumentprimarilyaddressesscheduledmaintenanceinspectionofheatexchangers,butcanalsobeusedbymanufacturersofheatexchangers,eithertoexaminetheconditionofthetubesafterinstallation,ortoestablishbaselinedataforevaluatingsubsequentperformanceoftheproductafterexposuretovariousenvironmentalconditions.Theultimatepurposeisthedetectionandevaluationofparticulartypesoftubeintegritydegradationwhichcouldresultinin-servicetubefailures.1.2Thispracticedoesnotestablishacceptancecriteria;theymustbespecifiedbytheusingparties.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:
【页数】:4P.;A4
【正文语种】:英语


基本信息
标准名称:原子吸收光谱仪检定规程
英文名称:Verification regulation of atomic absorption spectrometer
中标分类:
发布部门:国家教育委员会
发布日期:
实施日期:2004-03-23
首发日期:
作废日期:
归口单位:国家教育委员会
起草单位:国家教育委员会
起草人:邓 勃
出版日期:
页数:6页
适用范围

本规程适用于新购置、使用中的和检修后的各种类型的原子吸收光谱仪的检定。

前言

没有内容

目录

没有内容

引用标准

没有内容

所属分类:

版权声明:所有资料均为作者提供或网友推荐收集整理而来,仅供爱好者学习和研究使用,版权归原作者所有。
如本站内容有侵犯您的合法权益,请和我们取得联系,我们将立即改正或删除。
京ICP备14017250号-1