6.4.1 熱水 管道的布置與敷設(shè) Arrangement and Laying of Hot Water Pipes-1733554268200

6.4.1熱水管道的布置與敷設(shè)ArrangementandLayingofHotWaterPipes一、熱水管道的布置與敷設(shè)ArrangementandLayingofHotWaterPipes熱水管網(wǎng)同給（冷）水管網(wǎng)，有明設(shè)和暗設(shè)兩種敷設(shè)方式。Similartothe(cold)watersupplypipenetwork,therearetwolayingmethodsforthehotwaterpipenetwork:exposedlayingandconcealedlaying.銅管、薄壁不銹鋼管、襯塑鋼管等可根據(jù)建筑、工藝要求暗設(shè)或明設(shè)。

Copperpipes,thin-walledstainlesssteelpipes,andplastic-linedsteelpipescanbeconcealedorexposedaccordingtotherequirementsofbuildingsandprocesses.塑料熱水管宜暗設(shè)，明設(shè)時(shí)立管宜布置在不受撞擊處，如不可避免時(shí)，應(yīng)在管外加防紫外線照射、防撞擊的保護(hù)措施。

Plastichotwaterpipesshallbelaidinaconcealedmanner.Incaseofexposedlaying,verticalpipesshallbesetatplacesfreefromimpact.Ifitisunavoidable,protectivemeasuresagainstultravioletirradiationandimpactshallbeaddedoutsidethepipes.一、熱水管道的布置與敷設(shè)ArrangementandLayingofHotWaterPipes熱水管道暗設(shè)時(shí)，其橫干管可敷設(shè)于地下室、技術(shù)設(shè)備層、管廊、吊頂或管溝內(nèi)，其立管可敷設(shè)在管道豎井或墻壁豎向管槽內(nèi)，支管可埋設(shè)在地面、樓板面的墊層內(nèi)，但銅管和聚丁烯管（PB）埋于墊層內(nèi)宜設(shè)保護(hù)套。Whenthehotwaterpipesareconcealed,thehorizontalmainpipecanbelaidinthebasement,technicalequipmentlayer,pipegallery,suspendedceilingsorpipegrooves.Theverticalpipecanbelaidinthepipeshaftorverticalpipegrooveonthewall.Thebranchpipecanbeburiedinthecushionofthegroundandslab,butcopperpipesandpolybutylenepipes(PB)shallbeprovidedwithprotectivecasingswhentheyareburiedinthecushion.暗設(shè)管道在便于檢修地方裝設(shè)法蘭，裝設(shè)閥門(mén)處應(yīng)留檢修門(mén)，以利于管道更換和維修。Flangesshallbeinstalledonconcealedpipesatplacesthatareconvenientformaintenance,andaccessdoorsshallbereservedatvalvestofacilitatepipereplacementandmaintenance.管溝內(nèi)敷設(shè)的熱水管應(yīng)置于冷水管之上，并且進(jìn)行保溫。Hotwaterpipeslaidinthepipegroovesshallbeplacedabovecoldwaterpipes,andinsulationmeasuresshallbetaken.一、熱水管道的布置與敷設(shè)ArrangementandLayingofHotWaterPipes熱水管道穿過(guò)建筑物的樓板、墻壁和基礎(chǔ)處應(yīng)加套管，穿越屋面及地下室外墻時(shí)，應(yīng)加防水套管，以免管道膨脹時(shí)損壞建筑結(jié)構(gòu)和管道設(shè)備。Casingsshallbeaddedattheplaceswherehotwaterpipespassthroughslabs,wallsandfoundationsofbuildings.Waterproofcasingsshallbeaddedwhenhotwaterpipespassthroughroofsandexteriorwallsofthebasementtoavoiddamagetobuildingstructuresandpipelineequipmentduringtheexpansionofpipes.當(dāng)穿過(guò)有可能發(fā)生積水的房間地面或樓板面時(shí)，套管應(yīng)高出地面50~100mm。熱水管道在吊頂內(nèi)穿墻時(shí)，可預(yù)留孔洞。Whenhotwaterpipespassthroughtheroomfloororslabwherewatermayaccumulate,thecannulashallbe50to100millimetersabovetheground.Whenthehotwaterpipespassthroughthewallintheceiling,holescanbereserved.上行下給式配水干管的最高點(diǎn)應(yīng)設(shè)排氣裝置（自動(dòng)排氣閥，帶手動(dòng)放氣閥的集氣罐和膨脹水箱），下行上給配水系統(tǒng)，可利用最高配水點(diǎn)放氣。Exhaustdevices(automaticexhaustvalve,aircollectorwithamanualventvalveandexpansiontank)shallbesetatthehighestpointofthedown-feedmainwaterdistributionpipe.Aircanbedischargedfromthehighestwaterdistributionpointfortheup-feedwaterdistributionsystem.一、熱水管道的布置與敷設(shè)ArrangementandLayingofHotWaterPipes下行上給熱水供應(yīng)系統(tǒng)的最低點(diǎn)應(yīng)設(shè)泄水裝置（泄水閥或絲堵等）,有可能時(shí)也可利用最低配水點(diǎn)泄水。Adrainagedeviceshallbesetatthelowestpointoftheup-feedhotwatersupplysystem(suchasadrainvalveorpipeplug),andthelowestdistributionpointcanalsobeusedfordrainageifpossible.下行上給式熱水系統(tǒng)設(shè)有循環(huán)管道時(shí)，其回水立管應(yīng)在最高配水點(diǎn)以下約0.5m處與配水立管連接。Whentheup-feedhotwatersystemisprovidedwithacirculatingpipe,itsreturnstandpipeshallbeconnectedtotheverticaldistributionpipeatabout0.5metersbelowthehighestdistributionpoint.上行下給式熱水系統(tǒng)只需將循環(huán)管道與各立管連接。Thedown-feedhotwatersystemonlyneedstoconnectthecirculatingpipewitheachverticalpipe.熱水橫管均應(yīng)保持有不小于0.003的坡度，配水橫干管應(yīng)沿水流方向上升，利于管道中的氣體向高點(diǎn)聚集，便于排放；回水橫管應(yīng)沿水流方向下降，便于檢修時(shí)泄水和排除管內(nèi)污物。Thehorizontalhotwaterpipesshallmaintainaslopeofnotlessthan0.003,andthehorizontalmainwaterdistributionpipeshallrisealongtheflowdirectiontofacilitatethegasinthepipestoaccumulateathighpointsfordischarge.Thehorizontalreturnwaterpipeshalldescendalongtheflowdirectiontofacilitatedrainageandremovalofdirtfromthepipesduringmaintenance.二、熱水供應(yīng)系統(tǒng)的保溫InsulationoftheHotWaterSupplySystem熱水供應(yīng)系統(tǒng)中的水加熱設(shè)備、貯熱水器、熱水箱、熱水供水干、立管，機(jī)械循環(huán)的回水干、立管，有冰凍可能的自然循環(huán)回水干、立管，均應(yīng)保溫，其主要目的在于減少介質(zhì)傳送過(guò)程中無(wú)效的熱損失。Insulationmeasuresshallbetakenforwaterheatingequipment,heatstorageequipment,hotwatertanks,mainandverticalhotwatersupplypipes,mainreturnpipesandverticalpipeswithmechanicalcirculation,andmainreturnpipesandverticalpipeswithnaturalcirculationthatmaybefrozentoreduceinvalidheatlossduringthetransmissionofmedium.熱水配、回水管、熱媒水管常用的保溫材料為巖棉、超細(xì)玻璃棉、硬聚氨酯、橡塑泡棉等材料。

Thermalinsulationmaterialscommonlyusedforhotwaterdistributionpipes,returnpipesandheatmediumpipesarerockwool,extra-fineglasswool,hardpolyurethane,NBR-PVCfoamandothermaterials.管道和設(shè)備在保溫之前，應(yīng)進(jìn)行防腐蝕處理。

Pipesandequipmentshallbesubjecttoanti-corrosiontreatmentbeforethermalinsulation.保溫材料應(yīng)與管道或設(shè)備的外壁緊密相貼密實(shí)，并在保溫層外表面做防護(hù)層。

Theinsulationmaterialsshallbecloselyattachedtotheouterwallofthepipesorequipment,andthepr