6.4.1 热水 管道的布置与敷设 Arrangement and Laying of Hot Water Pipes-1733554268200

6.4.1热水管道的布置与敷设ArrangementandLayingofHotWaterPipes一、热水管道的布置与敷设ArrangementandLayingofHotWaterPipes热水管网同给（冷）水管网，有明设和暗设两种敷设方式。Similartothe(cold)watersupplypipenetwork,therearetwolayingmethodsforthehotwaterpipenetwork:exposedlayingandconcealedlaying.铜管、薄壁不锈钢管、衬塑钢管等可根据建筑、工艺要求暗设或明设。

Copperpipes,thin-walledstainlesssteelpipes,andplastic-linedsteelpipescanbeconcealedorexposedaccordingtotherequirementsofbuildingsandprocesses.塑料热水管宜暗设，明设时立管宜布置在不受撞击处，如不可避免时，应在管外加防紫外线照射、防撞击的保护措施。

Plastichotwaterpipesshallbelaidinaconcealedmanner.Incaseofexposedlaying,verticalpipesshallbesetatplacesfreefromimpact.Ifitisunavoidable,protectivemeasuresagainstultravioletirradiationandimpactshallbeaddedoutsidethepipes.一、热水管道的布置与敷设ArrangementandLayingofHotWaterPipes热水管道暗设时，其横干管可敷设于地下室、技术设备层、管廊、吊顶或管沟内，其立管可敷设在管道竖井或墙壁竖向管槽内，支管可埋设在地面、楼板面的垫层内，但铜管和聚丁烯管（PB）埋于垫层内宜设保护套。Whenthehotwaterpipesareconcealed,thehorizontalmainpipecanbelaidinthebasement,technicalequipmentlayer,pipegallery,suspendedceilingsorpipegrooves.Theverticalpipecanbelaidinthepipeshaftorverticalpipegrooveonthewall.Thebranchpipecanbeburiedinthecushionofthegroundandslab,butcopperpipesandpolybutylenepipes(PB)shallbeprovidedwithprotectivecasingswhentheyareburiedinthecushion.暗设管道在便于检修地方装设法兰，装设阀门处应留检修门，以利于管道更换和维修。Flangesshallbeinstalledonconcealedpipesatplacesthatareconvenientformaintenance,andaccessdoorsshallbereservedatvalvestofacilitatepipereplacementandmaintenance.管沟内敷设的热水管应置于冷水管之上，并且进行保温。Hotwaterpipeslaidinthepipegroovesshallbeplacedabovecoldwaterpipes,andinsulationmeasuresshallbetaken.一、热水管道的布置与敷设ArrangementandLayingofHotWaterPipes热水管道穿过建筑物的楼板、墙壁和基础处应加套管，穿越屋面及地下室外墙时，应加防水套管，以免管道膨胀时损坏建筑结构和管道设备。Casingsshallbeaddedattheplaceswherehotwaterpipespassthroughslabs,wallsandfoundationsofbuildings.Waterproofcasingsshallbeaddedwhenhotwaterpipespassthroughroofsandexteriorwallsofthebasementtoavoiddamagetobuildingstructuresandpipelineequipmentduringtheexpansionofpipes.当穿过有可能发生积水的房间地面或楼板面时，套管应高出地面50~100mm。热水管道在吊顶内穿墙时，可预留孔洞。Whenhotwaterpipespassthroughtheroomfloororslabwherewatermayaccumulate,thecannulashallbe50to100millimetersabovetheground.Whenthehotwaterpipespassthroughthewallintheceiling,holescanbereserved.上行下给式配水干管的最高点应设排气装置（自动排气阀，带手动放气阀的集气罐和膨胀水箱），下行上给配水系统，可利用最高配水点放气。Exhaustdevices(automaticexhaustvalve,aircollectorwithamanualventvalveandexpansiontank)shallbesetatthehighestpointofthedown-feedmainwaterdistributionpipe.Aircanbedischargedfromthehighestwaterdistributionpointfortheup-feedwaterdistributionsystem.一、热水管道的布置与敷设ArrangementandLayingofHotWaterPipes下行上给热水供应系统的最低点应设泄水装置（泄水阀或丝堵等）,有可能时也可利用最低配水点泄水。Adrainagedeviceshallbesetatthelowestpointoftheup-feedhotwatersupplysystem(suchasadrainvalveorpipeplug),andthelowestdistributionpointcanalsobeusedfordrainageifpossible.下行上给式热水系统设有循环管道时，其回水立管应在最高配水点以下约0.5m处与配水立管连接。Whentheup-feedhotwatersystemisprovidedwithacirculatingpipe,itsreturnstandpipeshallbeconnectedtotheverticaldistributionpipeatabout0.5metersbelowthehighestdistributionpoint.上行下给式热水系统只需将循环管道与各立管连接。Thedown-feedhotwatersystemonlyneedstoconnectthecirculatingpipewitheachverticalpipe.热水横管均应保持有不小于0.003的坡度，配水横干管应沿水流方向上升，利于管道中的气体向高点聚集，便于排放；回水横管应沿水流方向下降，便于检修时泄水和排除管内污物。Thehorizontalhotwaterpipesshallmaintainaslopeofnotlessthan0.003,andthehorizontalmainwaterdistributionpipeshallrisealongtheflowdirectiontofacilitatethegasinthepipestoaccumulateathighpointsfordischarge.Thehorizontalreturnwaterpipeshalldescendalongtheflowdirectiontofacilitatedrainageandremovalofdirtfromthepipesduringmaintenance.二、热水供应系统的保温InsulationoftheHotWaterSupplySystem热水供应系统中的水加热设备、贮热水器、热水箱、热水供水干、立管，机械循环的回水干、立管，有冰冻可能的自然循环回水干、立管，均应保温，其主要目的在于减少介质传送过程中无效的热损失。Insulationmeasuresshallbetakenforwaterheatingequipment,heatstorageequipment,hotwatertanks,mainandverticalhotwatersupplypipes,mainreturnpipesandverticalpipeswithmechanicalcirculation,andmainreturnpipesandverticalpipeswithnaturalcirculationthatmaybefrozentoreduceinvalidheatlossduringthetransmissionofmedium.热水配、回水管、热媒水管常用的保温材料为岩棉、超细玻璃棉、硬聚氨酯、橡塑泡棉等材料。

Thermalinsulationmaterialscommonlyusedforhotwaterdistributionpipes,returnpipesandheatmediumpipesarerockwool,extra-fineglasswool,hardpolyurethane,NBR-PVCfoamandothermaterials.管道和设备在保温之前，应进行防腐蚀处理。

Pipesandequipmentshallbesubjecttoanti-corrosiontreatmentbeforethermalinsulation.保温材料应与管道或设备的外壁紧密相贴密实，并在保温层外表面做防护层。

Theinsulationmaterialsshallbecloselyattachedtotheouterwallofthepipesorequipment,andthepr