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1、氮气管道安装施工方案（Constructionschemeofnitrogenpipeinstallation）ThispaperiscontributedbykangxionglinDOCdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyoufirstselectTXT,ordownloadthesourcefiletothelocalview.Constructionschemeofnitrogenpipei
2、nstallation1.projectcontent1.1pipelineDN125L=5.5MPN=1MPadesignpressuremedium:nitrogeninstallation.1.2DN80L=103MpipelinedesignpressurePN=0.4MPamedium:nitrogencontaining1.3DN50LaccordingtothepipelinedesignpressurePN=135M=0.6MPamedium:nitrogencontaining
3、2.by2.1basisof"industrialmetalpipecodeforconstructionandacceptanceof"2.2"(GB50235-97)fieldequipment,industrialpipeweldingengineeringconstructionandacceptancespecification"(GBJ50236-98)2.3."petroleumchemicaltoxicandcombustiblemediumpipingengineeringco
4、nstructionandacceptancespecification"(SHJ3501-2002)2.4"constructionsitetemporaryelectricalsafetytechnicalspecifications"(JGJ462005).3pipinginstallationprocedures4.preparationbeforeinstallation4.1.Studyconstructiondrawingstodeterminethepipenumber,spec
5、ification,material,directionandstartofthepipetobeinstalled.4.2,determinethepipelineaccessories,suchasthreepass,elbow,valve,throttledevice,onlinedetectionandcontrolcomponents,whetherweldinginthegroundprefabrication,etc.shouldfirstgrasp.4.3,determineth
6、epipeandotherpipeandtheactualscenewithoutconflicts(suchas,theconstructionunitshallinformtheengineer,toexpeditetheimplementationofinstantchangescheme)5.pipeprefabricationandprocessing,canbeidentified5.1pipelinepipelineemptyview.5.2pipingprefabrication
7、shallcomplywiththefollowingrequirements.5.2.1.pipelineshouldbetransplantedbeforetheoriginalsigns.5.2.2inordertoensurethequalityofengineeringconstructionandeasytoinstall,shouldbereasonableselectionofclosedpipesectionandfreepipesection,andpipesectionpr
8、ocessingenderrorcontrolchartshouldbeinaccordancewiththefollowingstandards.5.2.3.thefreepipesectionshallbeprocessedaccordingtothelengthprescribedbythesinglelinedrawingofthepipeline.Theenclosedpipesectionshallbeprovidedwithanappropriatemargin,whichshal
