【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


【英文标准名称】:Waterconditioningequipmentinsidebuildings-Devicesusingmercurylow-pressureultravioletradiators-Requirementsforperformance,safetyandtesting
【原文标准名称】:建筑物内水处理设备.使用水银低压紫外散热器的设备.性能、安全和测试要求
【标准号】:BSEN14897-2006+A1-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2006-09-29
【实施或试行日期】:2006-09-29
【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】:抗菌的;建筑物;制造日期;定义;设计;消毒;消毒器;剂量;剂量计;饮用水再处理;饮用水设备;饮用水质量;家用(安装)设备;检验;数学计算;汞蒸气;操作;性能要求;光线疗法;饮用水;合格试验;辐射;规格试验;安全;安全要求;建筑物服务设施;规范(验收);测试;紫外线辐射;UV;水常规;水净化;给水;给水(建筑物);给水设施;水处理
【英文主题词】:Antibacterial;Buildings;Dataofthemanufacturer;Definition;Definitions;Design;Disinfections;Disinfectors;Dosage;Dosimeters;Drinkingwateraftertreatment;Drinkingwaterinstallations;Drinkingwaterquality;Houseinstallations;Inspection;Mathematicalcalculations;Mercuryvapour;Operation;Performancerequirements;Phototherapy;Potablewater;Qualificationtests;Radiation;Ratingtests;Safety;Safetyrequirements;Serviceinstallationsinbuildings;Specification(approval);Testing;Ultravioletradiation;UV;Waterpractice;Waterpurification;Watersupply;Watersupply(buildings);Watersupplyinstallations;Watertreatment
【摘要】:Thisdocumentspecifiesdefinitions,principlesofconstruction,requirementsandmethodsfortestingtheperformanceofUVdevicesfordrinkingwaterinstallationsinsidebuildingswhicharepermanentlyconnectedtothemainssupplyatthepointofentryintoabuildingorwithinthewaterdistributionsysteminsidethebuilding.UVdevicesinthesenseofthisstandardareUVbactericidaltreatmentdevicesorUVdisinfectiondevices.
【中国标准分类号】:Q81
【国际标准分类号】:13_060_20;91_140_60
【页数】:34P.;A4
【正文语种】:英语