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1.1.1.PPR管道施工工艺PPRpipeinstallationmethod1.1.1.1.编制依据Basisofdrawingup1.1《给水排水管道工程施工及验收规范》GB50268-97。《ConstructionandacceptancenormofWatersupplyanddrainspipingengineering》。1.2《室内管道支架及吊架》03S402《Pipingsupportindoor》。1.1.1.2.施工工艺：Constructiontechnique:根据现场各种管线布置情况和流程顺序确定工艺流程，本工程采用如下工艺流程：施工准备→材料进货检验→PPR管预制加工→支吊架制作安装→PPR管安装→PPR管试验Accordingtothearrangementandfloworderoffieldallkindsofpipelines,confirmtheprocessflow.Thisengineeringadoptsthefollowingprocessflow:constructionpreparation→materialstockingtest→PPRpipepre-processing→manufactureandinstallationofsupportandhanger→installationofPPRpipe→PPRpipetest1).施工准备：Constructionpreparation施工工作及技术人员认真熟悉原图纸，领会设计意图，对图纸中和实际管道布置清楚后，才能施工。Constructionworkandtechniciansarestrictlyfamiliarwiththeoriginaldrawing,comprehenddesignpurpose,andcarryouttheconstructionaftertheclaritytodrawingandactualpipelinearrangement.施工人员须熟悉PPR管的一般性能，掌握必须的操作要点。在各项预制加工项目开始前，根据实际编制材料计划，将需要的材料、设备等按规格、型号准备好，运至现场。ConstructermustknowwellthegeneralperformanceofPPR,masternecessaryoperationpoints,Beforeeachprecastprocessingproject,accordingtotheplanofpracticalschedulingmaterial,wellpreparetheneededmaterialandequipmentaccordingtospecificationandmodelandtransporttothefield.材料设备要求：到现场的管材、管件等提供的管材和管件应符合设计规定，并附有产品说明书和质量合格证书，须认真检查并经业主验明材质，核对质保书，规格、型号等，合格后方能入库，并分别作好标识。Materialequipmentrequirements:Theofferedfieldpipeandpipefittingsshouldaccordwithdesignprescription,addingwithproductstipulationandqualitycertification.Strictlyexamineandidentifymaterialbyowner,checkqualityguarantee,specificationandmodelsetc,warehouseafterqualification,andmarkseparately.管材和管件的内外壁应光滑平整，无气泡、裂纹、脱皮和明显的痕纹、凹陷，色泽应基本一致。不得使用有损坏迹象的材料。如发现管道质量有异常，应在使用前进行复检。Theinternalandexternalsurfaceofpipeandpipefittingsshouldbesmoothandflat,withoutairbladder,crack,desquamate,obvioustraceandhollow,andthecolorandlustershouldbeconsistent.Thematerialwithdamagedmarkshouldbeforbidden.Ifitisdiscoveredthatthereisprobleminthepipelinequality,recheckitbeforeusing.管材的端面应垂直于管材的轴线。管件应完整、无缺损、无变形。Endfaceofpipeshouldbeuprighttotheaxesofpipe.Thepipefittingsshouldbeintact,withoutlackanddistortion.管件和管材不应长期置于阳光下照射，为避免管子在储运时弯曲，堆放应平整。搬运管材和管件时，应小心轻放，避免油污，严禁剧烈撞击，与尖锐物触碰和抛、摔、拖。管材开口处应及时封堵，以免管道堵塞造成不必要的浪费。Pipefittingandpipeshouldnotbeplacedinthesunshineforalongtimetoavoidthepipecurveinstorageandtransportation,andpilingupthemshouldbelevel.Whenconveyingpipeandpipefittings,theyshouldhandledwithcareandavoidoilstain.Strongbump,cast,throwanddrawisforbidden.Pipehatchshouldbeimmediatelypluggedtoavoidpipejamandunnecessarywaste.施工现场与材料存放处温差较大时，应于安装前将管件和管材在现场放置一定时间，使其温度接近施工现场环境温度。Whenthereislargedifferenceinconstructionfieldandstoragetemperature,shouldplacepipefittingandpipeatthefieldbeforeinstallationforcertaintimeandmakeitstemperatureclosuretoenvironmenttemperatureofconstructionfield.本项目PPR管道采用热熔连接，施工前应仔细检查所使用的热熔机具、割刀是否符合要求和正常使用，使用的电源及电线是否正常和安全。如下图：Thisprojectpipe-PPRpipeadoptsheatfusion.Beforeconstruction,shouldcarefullyexaminewhethertheusinghotmeltequipmentandcutterknifeaccordwithrequirementsandnormalservice,theusingpowersupplyandwirearenormalandsecurity.asthefollowingdrawings.材料进货检验：Material-stockingtest为确保安装质量，材料进货时应严格检验，其管径椭圆率应＜10%，管材同一截面的壁厚偏差应＜14%，内外壁应光滑、平整，无气泡、裂口、裂纹、凹陷、脱皮和严重的冷斑及明显的痕迹。Forinsuringtheinstallationquality,shouldstrictlytestthematerialwhenitisstocked.Theellipticityofpipediametershouldbelessthan10%.Thewallthicknessdeviationinthesamepipesectionshouldbelessthan14%.Theinternalandexternalsurfaceshouldbesmooth,flat,withoutairbladder,crack,hollowingdesquamate,severecoldappearanceandobvioustrace.2).PPR管道预制加工:PrecastprocessingofinnerpipePEpipelinePE管连接：采用热熔连接方式。热熔连接最为可靠，操作方便，气密性好，接口强度高。本方案中热熔焊接为关键工序，具体方案如下：PPRpipeconnection:adopthotmeltconnectionmethod.Hotmeltmethodisthemostreliable,withconvenientoperationandgoodairtightnessandhighjointstrength.Inthisproject,sweatingsolderingisthekeyworkingprocedure;thedetailprojectisasthefollowings.（1）PPR管道接触式焊接安装PEpipetouchweldinginstallation其施工方法及技术措施如下：Methodofexecutionofworksandactionstobetaken①管道连接采用热熔焊接。热熔焊接为关键工序，必须严格控制。Thepipingconjunctionadoptshotmelttoweld.Thehotmeltweldisthekeywork,havetocontrolstrictly.②管道焊接主要程序：Thepipingweldsmainprocedure:A：设置焊机的初始值（液压值、温度）；Establishtheinitialvalueoftheweldingmachine(theliquidpressesvalue,temperature)液压值的设置：Theconstitutionoftheliquidpressesvalue管径DN100MM以下，液压值设定为0.2MPa;DiameterofpipeisDN100MMthefollowing,theliquidpressesvaluetosetfor0.2MPa;管径DN100-350MM时,液压值设定为0.4-0.5MPa;DiameterofpipeisDN100-DN350MM,theliquidpressesvaluetosetfor0.4-0.5MPa;温度的设置:Theconstitutionofthetemperature加热板预热时,温度设定为210℃;Heatplankpreparehot,thetemperaturesetsto210℃;加热焊口时,温度设定为190-210℃.Whileheatingthewelding,thetemperaturesetsto190-210℃.B：固定焊管,保证待焊接的管及管件中心在一条直线上,错口应在2毫米以内;Fixtheweldingpipe,assurancetreatstoweldingpipeandfitting’scenterisonastraightline,Distanceofshuntshouldat2mmin;C：抛磨管端口,保证端口平整,再用医用酒精清洗管端口,保证端口内外壁的清洁;Throwtowhetpipe’shead,promisepipe’sheadneat,useagaintocuretocleanpipe’sheadwiththealcohol,promisetheinsideandoutsidewallofpipe’sheadtoclean;D：室外温度为20°C时加热管及管件端口焊接参数如下表Outdoortemperatureisat20°Cheatingpipeandtubeportweldingparame