2011年机电专业建筑管道工程施工技术考点总结一（summary of construction technology test point of mechanical and electrical 12页

2011年机电专业建筑管道工程施工技术考点总结一（Summaryofconstructiontechnologytestpointofmechanicalandelectricalengineeringbuildingin2011）Managementandpracticeofmechanicalandelectricalengineering-2H312000buildingmechanicalandelectricalengineeringconstructiontechnologyBuildingmechanicalandelectricalengineeringisaspecializedprojectofmechanicalandelectricalengineering.Buildingmechanicalandelectricalinstallationprojectsincludeindustrial,civilandpublicbuildingelectricalandmechanicalinstallationworks.Buildingmechanicalandelectricalengineeringisdividedinto:-buildingpipeengineering;buildingelectricalengineering;ventilationandairconditioningengineering;buildingintelligentengineering;fireprotectionengineering.2H312010constructionpipelineengineeringconstructiontechnology1,thecontentofthistalkConstructionpipelineengineeringconstructiontechnology2,therequirementsofthesyllabus\n1)mastertheconstructionproceduresandkeypointsofwatersupply,drainageandheatingengineering;2)theconstructiontechnicalrequirementsofhigh-risebuildingpipelineengineering.Buildingpipeengineeringconstructionaccordingtothestandard:"buildingwatersupplyanddrainageandheatingengineeringconstructionqualityacceptancespecification"(GB50242);Worksinclude:indoorandoutdoorconstruction,pipelineconstruction-indoorEngineering:Citywatersupplysystem,indoordrainagesystem,indoorhotwatersupplysystem,sanitarywareinstallationandindoorheatingsystem;Outdoorengineering:outdoorwatersupply,drainage,heatingpipenetwork,buildingwatersystemandswimmingpoolsystem,etc..Theconstructionsiteshallhavethenecessaryconstructiontechnicalstandards,andshallbecarriedoutinaccordancewiththeprescribedconstructionprocedures.2H312011masterwatersupply,drainage,heatingandheatingengineeringconstructionproceduresGeneralconstructionproceduresforwatersupply,drainage,\nheatingandheatingpipinginbuildingequipmentandpipingsystemsare:Constructionpreparation--coordinationwithconstruction,reservation,embedment-pipingsupportfabrication-Annexinspection-pipinginstallation-pipingsystemtest-corrosionprotectioninsulationsystemcleaning-completionacceptance.I.constructionpreparationConstructionpreparationincludes(5items):-technicalpreparation,materialpreparation,machinepreparation,sitepreparation,constructionorganizationandpersonnelpreparation.-technicalpreparationFamiliarwithdrawings,data,andrelatednationalorindustrialconstruction,acceptance,standardspecificationsandstandarddrawings;Drawuptheconstructionorganizationdesignorconstructionplan,andreporttotheconstructionstaff.-materialpreparationPutforwardmaterialplantomaterialmanagementdepartmentanddoagoodjobofwarehousecheckingandstorage.\n-machinepreparationPrepareconstructionmachinery,tools,measuringtools,etc..SitepreparationPreparetheprocessingspaceandwarehouse.-constructionorganizationDrawuptheconstructionorganizationdesignorconstructionplan.Doagoodjobinsubdrawingsreviewandrelatedchanges,accordingtotheactualsituationofpipelineinstallation,flexibleselection,construction,flowlines,crossoperationandotherformsofconstruction.Constructionpreparationprinciple:Inthepreparationofconstructionorganizationdesign,shouldgenerallyconsiderthefirstdifficult,easy,afterthebig,smallpiecesofconstructionmethodsFollowthesmallpipe,thebigtube,theelectrictube,letthewaterpipe,thewaterpipe,theairpipe,thepressurepipe,letthenonpressurepipepipingprinciple.Two、withcivilreservationandembedmentCooperatewiththecivilconstructionprogress,makesureall\nthereservedholesandgroovecheckwork.Three,pipestentproductionTheconstructionofthepipesupportandsupportshallbecarriedoutaccordingtotherequirementsofthedrawing;Alternativematerialsshouldbeapprovedbythedesigninstitute;Weldingofpipesupportsandhangers,supportsandpartsshallcomplywiththeweldingprocedureofstructuralparts.Makingqualifiedhangersandhangersshallbeproperlytreatedandproperlypreserved.Four.AppendixinspectionRemember:Strengthandtightnesstestshallbedonebeforevalveinstallation;Testshallbecarriedoutineachbatch(thesamebrand,thesametype,thesamespecifications)inthenumberof10%checks,andnotlessthanone.Remember:Fortheinstallationofthemainpipeonthecutoffoftheclosedvalve,shouldbedoneindividuallystrengthand\ntightnesstest.Constructionnotice:Watersupply,drainage,heatingandheatingpipevalvestrengthtestpressureis1.5timesthenominalpressure;Thetightnesstestpressureis1.1timesofnominalpressure;Thetestpressureshallremainthesameduringthetestduration,andthecasepackingandvalveshallbesealedwithoutleakage.Five、pipeinstallation1.,accordingtotheactualmeasuredsizeofprefabricatedpipesection,andgroupingnumbers.2.theconnectionofthedrypipeinstallationis(payattentiontometalandnonmetalfittings):Threadconnection;-flangeconnection;-welding;-bonding;Socketjoint;Hotmeltconnection.\n3.verticalpipeinstallationisdividedinto:verticalpipeandpipeassembly.Aftertheinstallationoftheverticalpipe,thefittingshallbedonetoblockthefloorholes.-Cardconcealedrisershouldbesetupasteelpipewellhead,underuniformhanginginstallation.Theinstallationofthe4.branchpipeisdividedinto:theexposedbranchpipeandtheconcealedpipebranch.Withthehotandcoldwaterpipeshouldbeapprovedindifferentsanitaryappliancesprovidedwithbranchheight;thelocationofthewatermeterinstalledintheconnectingpipe,removethewatermeterinstalledinthepressuretestaftercompletionbefore;Hotandcoldwatersanitaryappliancesreservedopeningtodointheopen,withgood;Theuseofpipethreadconnection,shouldbenotedthatthefillershallnotbecrowdedintothepipe,soasnottoblockthepipeline.Six、pipingsystemtestPressuretestIrrigationtest\nPiggingtestAfterthepipingsystemisinstalled,thepipingsystemshallbetestedaccordingtothedesignorspecificationrequirements.Testsarecarriedoutaccordingtodifferentrequirementsofthepipingsystem.Thetypesoftestsaremainlydividedinto:-pressuretest(thevalueofexperimentalpressure)-IrrigationTest(irrigationheadheight,tomaintainacertaintimeandthesurfacedoesnotdrop)-balltest(balldiameter,ballrate).(1)mainpointsofpressuretest1.thewaterpressuretestofthewatersupplypipelinesystem,fireprotectionsystemandoutdoorwatersupplynetworksysteminthecivilbuildingmustcomplywiththedesignrequirements.Remember:Whenthedesignisnotspecified,thetestpressureis1.5timestheworkpressure,butnotlessthan0.6MPa.Testmethodsandqualificationrequirementsshallbecarried\noutaccordingtospecifications.Qualified2.inthecivilbuildingwatersupplysystem,heatingsystemandoutdoorheatingpipepressuretestrequirementsandtestmethodsandrequirements,shouldaccordingto"buildingwaterandheatingengineeringconstructionqualityacceptance"(GB50242)requirements.Inspectionnotes:-payattentiontoobservationtime,measurestepvoltageandvoltageregulationtimeMetalandcompositepipefeedwaterpipelinesystemundertestpressureobservation10min,pressuredropshouldnotbegreaterthan0.02MPa,andthendowntotheworkpressureforinspection,shouldnotleak;Theplasticfeedwatersystemshallbecarriedoutseparately:Undertestpressure,thepressureregulator1H;andthen1.15timestheworkingpressureregulator2h,thepressuredropshallnotexceed0.03MPa,whilecheckingtheconnectionsshallnotleak.(two)themainpointsofirrigationtest1.concealedorburiedindoordrainagepipesmustbetestedbeforetheyareconcealed.Theirrigationheightshallnotbelowerthantheupperedgeofthefloorsanitaryapparatusorthefloorheightofthehouse.\n2.testmethod:Remember:Methodandqualification:Whenthewaterisfilledwithl5min,thewatersurfaceisloweredandfilledagain.The5minisobserved,thesurfaceisnotdropping,andtheleakageoftheinterfaceoftheindoordrainagepipeisnotqualified.3.outdoordrainageinspectionandsectionaltest.Remember:Thetestheadshallbe30minplusLMattheupstreampipeofthetestsection,thetimeshallbenolessthantheleakageofthepipeinterface,andtheleakageshallbequalified.(three)piggingtest(remember:thediameterofball)Theindoorwaterdrainageriserandhorizontaltrunkpipe,afterinstallationshallbepiggingtest,Detectionprinciple:Notlessthanthediameterofballdrainagepipediameter2/3,ballrateof100%qualified.Seven,anti-corrosioninsulation(anti-corrosion/\ninsulation)Themainanti-corrosionmethodsofpipelinearepainting,lining,electrostaticprotectionandcathodicprotection.Pipelineinsulationcanbedividedintothreetypes:heatpreservation,coldprotectionandheatingprotection.Iftheuseofrubberinsulationmaterialsinsulation,thermalinsulationpipeshouldputtheknifecutin,coatedwithaspecialglueatthemouth,andthensetinthepipe,willdrawonbothsidesofthebutt,iftheinsulationmaterialforplatedirectlyintheinterfaceglue,docking.Eight,systemcleaningPipingsystemshouldbecleanedafterhydraulictestisqualified.Rememberconstructionprocedures:1)whenflushingthehotwaterpipingsystem,thehotwaterpipeshouldbewashedatthebottomofthepipe,andthenthebranchesofeachloopcanbewashed;2)supplywatertothesystemfromthetemporarywaterinlet,closethecontrolvalveoftheotherbranchpipe,openthebottomvalveoftheendpipeofthedrypipeatthebottom,anddrainthewateratthebottomandleadittothedrainagesystem;3)observewhetherthewaterqualitychangesattheoutlet;\n4)afterthebottompipeisflushed,thebranchloopsarewashedinsequenceuntilthewholesystemisflushed.