SHS 01009-92(英文版) 管壳式换热器维护检修规程

TheChineseversionofstandardshasprecedencetotheirEnglishtranslationswhichareonlyforinternalreference.本英文版为内部资料，仅供参考，以中文版为准。MaintenanceandServiceProcedureforPetrochemicalEquipment--GeneralEquipmentMaintenanceandServiceProcedureforShellandTubeHeatExchanger（管壳式换热器维护检修规程）SHS01009-92(ForTrialImplementation)PromulgatedbySINOPECSINOPECPublishingHouse1Contents1GENERAL.................................................................................................................................................22.PERIODANDCONTENTOFMAINTENANCE......................................................23.MAINTENANCEANDQUALITYSTANDARD........................................................24.TESTINGANDACCEPTANCE..............................................................................................65.SERVICEANDTROUBLESHOOTING..........................................................................921General1.1Subjectandscope1.1.1Thisprocedurespecifiestheperiodandcontentofmaintenance,maintenanceandqualitystandard,testingandacceptance,andserviceandtroubleshootingofheatexchangingequipment.1.1.2Thisprocedureisapplicabletothepetrochemicalsteelshell-and-tubeheatexchangerslikefixedtubesheetexchanger,floating-headexchanger,U-tubeexchangeretc.,andkettle-typereboilers,withoperatingpressurebelow35Mpa.1.1.3TheserviceofpressureelementsshallcomplywithSHS01004-92“MaintenanceandServiceProcedureforPressureVessels”1.1.4ReferencesSY21003-73MaintenanceandServiceProcedureforHeatExchangerinOilRefineryGB151-89SteelTubularExchanger2.PeriodandContentofMaintenance2.1MaintenanceperiodThemaintenanceintervalcanbedeterminedbyindividualenterpriseaccordingtothefeaturesofitsproductionequipment.2.2Maintenancecontent2.2.1Cleaningtubebundleandshell.2.2.2Weldingjointandexpandedjointtreatmentoftubebundleandthereplacementindividualtube.2.2.3Checkandrepairthetubebox,frontandbackcover,smallandbigfloatingheads,andfittingsetc.,aswellastheirsealfaces,replacegasketsandtestwithpressure.2.2.4Replacesomeoftheboltsandnuts.2.2.5Repairthethermalinsulationoftheshellandmakeanticorrosiontreatment2.2.6Replacethetubebundleortheshell.2.2.7Replacetheshell.3.MaintenanceandQualityStandard3.1PreparationspriortoService3.1.1Havefullknowledgeoftheoperationconditions,andmakeallthenecessary3drawingsanddocumentsathand.3.1.2Prepareallthenecessaryservicetools,teststand,clampingapparatusetc.3.1.3Displaceandcleanouttheinternalfluid,tomeettherequirementsofsafetyservice.3.2Contentoftheinspection3.2.1Cleanthetubebundleandshell.3.2.2Inspectvisuallytheshell,tubebundle,andcomponentsforanycorrosion,crack,deformation,etc.Haveaspotcheckwithsurfaceflawdetection,ifnecessary.3.2.3Inspecttheanticorrosivecoatingforanysignofagingandpeelingoff.3.2.4Inspecttheliningforanycorrosion,swell,fold,andcrack.3.2.5Checkthesealfacesandthegaskets.3.2.6Checkthewearconditionofthefasteners.Cleanandexaminethehigh-pressureboltsandnutsonebyone,andcarryoutsurfacenondestructiveinspectionifnecessary.3.2.7Inspectthefoundationforanysettlement,inclining,damageandcrack.Checkitsanchorboltsandpatstoseeiftheyareloosenedanddamaged.3.3Maintenancequalitystandard3.3.1Thescalingontheinnerandoutersurfaceofthetubebundleshallbecleanedout.3.3.2Incasethereisapartitionplateinthetubebox,itsgasketsshallbemachinedmonolithically,andshallbefreeofanydefectsthatmayaffectthesealing.3.3.3Whenblockingleakingtubesoftubebundles,onthesametubeside,thenumberoftubesbeingblockedtostopleakingshallnotexceed10%ofthetotalnumberofthetubes.Withintheallowedrangeofprocessindex,thenumberofblockedtubesmaybeincreasebyanappropriateamount.3.3.4Allthepartsandcomponentsusedshallconformtotherelevanttechnicalspecifications,andshallbeprovidedwithcertificateofcomplianceformaterials.3.3.5Replacingtubebundles3.3.5.1Thetubesurfaceshallbefreeofsuchdefectionsascracks,folds,double-skin,etc.3.3.5.2Whenitisnecessarytosplicethetubes,onlyoneweldingjointasmaximumisallowedonthesameheatexchangingtube(U-tubemayhavetwoweldingjoints).Theminimumtubelengthshallbenolessthan300mmandnoweldingjointsforsplicingshallnotbeallowedwithintheelbowsectionofU-tube,whilethelengthofstraighttubesectionshallbenolessthan50mm,andtheunfitnessofbuttjointshallnotexceed15%ofthetubewallthicknessandnotbegreaterthan0.5mm.3.3.5.3Testthehardnessofthetubes.Normallyitisrequiredthatthehardnessofthetubeshallbe30HBlowerthanthatofthetubesheet.Incasethetubehardnessishigherthanorclosertothetubesheethardness,theannealingtreatmentshallbemadetothetwoendsofthetubes.Thetubelengthsubjectedtotheannealingtreatmentshallbe80mm~100mm4longerthanthethicknessofthetubesheet.3.3.5.4Theendsofthetubeshallbecleanandfreeofgreaseanddirt,andshallnothaveanydefectsthatmayaffectthetightnessoftheexpandedjoints,suchaspenetrated,longitudinalorspiralscores.3.3.5.5Thebothendsoftubesshallprojectbeyondthetubesheets,andthelengthofthetubeendsprojectedfromthetubesheetsshallbe41mm.3.3.5.6Thedegreeofexpandedtubejointshallbewithintherangeof0.7~1.6%.(d’ID–dID)–(d0–d)Degreeofexpandedtubejoint=100%d0where:d’IDtheinsidediameterofthetubeafterexpandedforjoint;dIDtheinsid