本英文版为内部资料，仅供参考，以中文版为准。MaintenanceandServiceProcedureforPetrochemicalEquipment-GeneralEquipmentMaintenanceandServiceProcedureforShellandTubeHeatExchanger(管壳式换热器爱护检修规程)SHS01009-92(ForTrialImplementation)PromulgatedbySINOPECSINOPECPublishingHouseContents1. General22. PeriodandContentofMaintenance23. MaintenanceandQualityStandard34. Testingandacceptance95. ServiceandTroubleshooting121 General1.1 Subjectandscope1.1.1 Thisprocedurespecifiestheperiodandcontentofmaintenance,maintenanceandqualitystandard,testingandacceptance,andserviceandtroubleshootingofheatexchangingequipment.1.1.2 Thisprocedureisapplicabletothepetrochemicalsteelshell-and-tubeheatexchangerslikefixedtubesheetexchanger,floating-headexchanger,U-tubeexchangeretc.,andkettle-typereboilers,withoperatingpressurebelow35Mpa.1.1.3 TheserviceofpressureelementsshallcomplywithSHS01004-92MaintenanceandServiceProcedureforPressureVessels1.1.4 ReferencesSY21003-73MaintenanceandServiceProcedureforHeatExchangerinOilRefineryGB151-89SteelTubularExchanger2. PeriodandContentofMaintenance2.1 MaintenanceperiodThemaintenanceintervalcanbedeterminedbyindividualenterpriseaccordingtothefeaturesofitsproductionequipment.2.2 Maintenancecontent2.2.1 Cleaningtubebundleandshell.2.2.2 Weldingjointandexpandedjointtreatmentoftubebundleandthereplacementindividualtube.2.2.3 Checkandrepairthetubebox,frontandbackcover,smallandbigfloatingheads,andfittingsetc.,aswellastheirsealfaces,replacegasketsandtestwithpressure.2.2.4 Replacesomeoftheboltsandnuts.225Repairthethermalinsulationoftheshellandmakeanticorrosiontreatment2.2.6 Replacethetubebundleortheshell.2.2.7 Replacetheshell.3. MaintenanceandQualityStandard3.2 PreparationspriortoService3.1.1 Havefullknowledgeoftheoperationconditions,andmakeallthenecessarydrawingsanddocumentsathand.3.1.2 Prepareallthenecessaryservicetools,teststand,clampingapparatusetc.3.1.3 Displaceandcleanouttheinternalfluid,tomeettherequirementsofsafetyservice.3.2 Contentoftheinspection3.2.1 Cleanthetubebundleandshell.3.2.2 Inspectvisuallytheshell,tubebundle,andcomponentsforanycorrosion,crack,deformation,etc.Haveaspotcheckwithsurfaceflawdetection,ifnecessary.1.1.1 Inspecttheanticorrosivecoatingforanysignofagingandpeelingoff.3.2.4 Inspecttheliningforanycorrosion,swell,fold,andcrack.3.2.5 Checkthesealfacesandthegaskets.3.2.6 Checkthewearconditionofthefasteners.Cleanandexaminethehigh-pressureboltsandnutsonebyone,andcarryoutsurfacenondestructiveinspectionifnecessary.3.2.7 Inspectthefoundationforanysettlement,inclining,damageandcrack.Checkitsanchorboltsandpatstoseeiftheyareloosenedanddamaged.3.3Maintenancequalitystandard3.3.1 Thescalingontheinnerandoutersurfaceofthetubebundleshallbecleanedout.3.3.2 Incasethereisapartitionplateinthetubebox,itsgasketsshallbemachinedmonolithically,andshallbefreeofanydefectsthatmayaffectthesealing.3.3.3 Whenblockingleakingtubesoftubebundles,onthesametubeside,thenumberoftubesbeingblockedtostopleakingshallnotexceed10%ofthetotalnumberofthetubes.Withintheallowedrangeofprocessindex,thenumberofblockedtubesmaybeincreasebyanappropriateamount.3.3.4 Allthepartsandcomponentsusedshallconformtotherelevanttechnicalspecifications,andshallbeprovidedwithcertificateofcomplianeeformaterials.3.3.5 Replacingtubebundles3.3.5.1 Thetubesurfaceshallbefreeofsuchdefectionsascracks,folds,double-skin,etc.3.3.5.2 Whenitisnecessarytosplicethetubes,onlyoneweldingjointasmaximumisallowedonthesameheatexchangingtube(U-tubemayhavetwoweldingjoints).Theminimumtubelengthshallbenolessthan300mmandnoweldingjointsforsplicingshallnotbeallowedwithintheelbowsectionofU-tube,whilethelengthofstraighttubesectionshallbenolessthan50mm,andtheunfitnessofbuttjointshallnotexceed15%ofthetubewallthicknessandnotbegreaterthan0.5mm.3.3.5.3 Testthehardnessofthetubes.Normallyitisrequiredthatthehardnessofthetubeshallbe30HBlowerthanthatofthetubesheet.Incasethetubehardnessishigherthanorclosertothetubesheethardness,theannealingtreatmentshallbemadetothetwoendsofthetubes.Thetubelengthsubjectedtotheannealingtreatmentshallbe80mm100mmlongerthanthethicknessofthetubesheet.3.3.5.4 Theendsofthetubeshallbecleanandfreeofgreaseanddirt,andshallnothaveanydefectsthatmayaffectthetightnessoftheexpandedjoints,suchaspenetrated,longitudinalorspiralscores.3.3.5.5 Thebothendsoftubesshallprojectbeyondthetubesheets,andthelengthofthetubeendsprojectedfromthetubesheetsshallbe41mm.3.3.5.6 Thedegreeofexpandedtubejointshallbewithintherangeof071.6%.(dID-dID)-(dO-d)Degreeofexpandedtubejoint=100%dOwhere: drID for joint;dIDed for jointdfor joint;dO joint.theinsidediameterofthetubeafterexpandedtheinsidediameterofthetubebeforeexpandtheoutsidediameterofthetubebeforeexpandedtheapertureofthetubesheetbeforeexpandedfor3.3.5.7 TheexpandingoperationshouldnotbecarriedoutatatemperaturebelowOoC.Afterexpansion,theexpandedsectionandthetransitionsectionofthetubeshallbesmooth,withoutanycrackandgroove.Thereexpansiono