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1、dateandproductionfactoryname.(2)thesteeltubewallthicknesstouniform,weldisconsistent,withoutfracturing,sandholes,edgeandshallowconcavephenomenon.(3)couplingthreadisclearlynotdisorderlyclasp,smoothandnoburronbothends.2)prefabrication(1)heatpipe:canuselever
2、simmerpigorhydraulicheatpipeheatpipe.Whenusingtheleverstewedpig,mobilemoderation,don'tforcetoohard;Whenusinghydraulicstewedpig,mouldtoformacompleteset.Pipeheatbending,concaveflatdegreeshouldbenotmorethan1/10ofthetubediameter,cambershallbenotlessthan90deg
3、rees,bendingradiusshouldnotlessthan6timesofpipediameter,suchascable,shouldbeadaptedtothebendingradius.Whenthewireprotectionpipeburiedundergroundorintheconcrete,thebendingradiusshouldnotlessthan10timesthepipediameter.(2)pipecut-off:willneedtocutthepipelen
4、gthmeasurementaccurate,fracturelevelnotskewed,thenozzlemillingissmooth,withoutburr,pipescrapironfree.(3)pipesetofsilk:usingasetofsilkmachineorsetofmachinetocoversilkprocessingpipe,choosecorrespondingdie.Firstwillbemachinedpartandlevelingmachinescrew,theb
5、uckleis,uniformmaynotbetoohard,hardcoversilkwhilepouringcoolingfluid.Pipeendsetofwirelengthshouldnotbelessthanhalfthelengthofpipejoint,threadiscleanandclear.3)boxesfixed(1)determinationofbox,boxlocation:accordingtotherequirementofdesigndrawing,box,boxaxi
6、spositionincivilpop-uphorizontallineasabenchmark,noteboxes,boxesofactualsize.(2)fordarkpipelayingpipeline,noteboxes,boxesofmortarandmortarshouldbefull,smoothandfirm,leveliscorrect.(3)forMingpipelayingpipeline,thesizeoftheliefixed-pointspacingrequirements
7、asstipulatedinthestandard,calculateanddeterminethelocationofthebracket,hanger,pipelineprotectionshouldbeuniform.Allbox(box)holewithmetalcore,itisforbiddentousegaswelding/weldinghole.4)pipinginstallationandconnection(1)couplingthreadedconnections:setofwir
8、ecannothavethephenomenonofdisorderlybuckle,pipeconnectiontoflushnozzle,drawonbothendsofthepipemouthfileupcouplingexposedwirenotmorethan2.(3)lineshouldavoidtomeetwithcoalgas,heatpipe,meetminimumdistanceis:thegaslineparallel
