6.3.1 熱水供應(yīng)系統(tǒng) 的管材和管件選用 Selection of Pipes and Fittings of the Hot Water Supply System-1733558725611

6.3.1熱水供應(yīng)系統(tǒng)的管材和管件選用SelectionofPipesandFittingsoftheHotWaterSupplySystem一、熱水供應(yīng)系統(tǒng)的管材和管件PipesandFittingsoftheHotWaterSupplySystem1熱水系統(tǒng)采用的管材和管件，應(yīng)符合國家現(xiàn)行標(biāo)準(zhǔn)的有關(guān)規(guī)定。管道的工作壓力和工作溫度不得大于國家現(xiàn)行標(biāo)準(zhǔn)規(guī)定的許用工作壓力和工作溫度。PipesandfittingsofthehotwatersupplysystemshouldcomplywiththerelevantprovisionsofprevailingChinesenationalstandards.Theworkingpressureandtemperatureofthepipesshallnotbegreaterthanthepermissiblevaluesspecifiedinprevailingnationalstandards.2熱水管道應(yīng)選用耐腐蝕和安裝連接方便可靠的管材，可采用薄壁不銹鋼管、薄壁銅管、塑料熱水管、復(fù)合熱水管等。當(dāng)采用塑料熱水管或塑料和金屬復(fù)合熱水管材時(shí)，應(yīng)符合下列規(guī)定：Hotwaterpipesshallbecorrosion-resistantandconvenientandreliableforinstallationandconnection.Thin-wallstainlesssteelpipes,thin-wallcopperpipes,plastichotwaterpipes,compositehotwaterpipes,etc.canbeused.Whenplastichotwaterpipesorplastic-metalcompositehotwaterpipesareused,thefollowingrequirementsshallbemet:1）管道的工作壓力應(yīng)按相應(yīng)溫度下的許用工作壓力選擇；Theworkingpressureofthepipesshallbeselectedaccordingtotheallowableworkingpressureatthecorrespondingtemperature;2）設(shè)備機(jī)房內(nèi)的管道不應(yīng)采用塑料熱水管。Plastichotwaterpipesshallnotbeusedforpipesintheequipmentroom.二、熱水供應(yīng)系統(tǒng)的附件FittingsoftheHotWaterSupplySystem1.自動(dòng)溫度調(diào)節(jié)裝置Automatictemperatureregulator熱水供應(yīng)系統(tǒng)中為實(shí)現(xiàn)節(jié)能節(jié)水、安全供水，在水加熱設(shè)備的熱媒管道上應(yīng)裝設(shè)自動(dòng)溫度調(diào)節(jié)裝置來控制出水溫度。Tosaveenergyandwaterandsupplywatersafelyinthehotwatersupplysystem,anautomatictemperatureregulatorshallbeinstalledontheheatmediumpipeofthewaterheatingequipmenttocontroltheoutletwatertemperature.二、熱水供應(yīng)系統(tǒng)的附件FittingsoftheHotWaterSupplySystem2.疏水器Steamtrap熱水供應(yīng)系統(tǒng)以蒸汽作熱媒時(shí)，為保證凝結(jié)水及時(shí)排放，同時(shí)又防止蒸汽漏失，用蒸汽作熱媒間接加熱的水加熱器應(yīng)在每臺(tái)開水器凝結(jié)水回水管上單獨(dú)設(shè)疏水器，蒸汽立管最低處、蒸汽管下凹處的下部應(yīng)設(shè)疏水器。Whenthesteamisusedastheheatmediuminthehotwatersupplysystem,toensuretimelydischargeofcondensateandpreventsteamleakage,asteamtrapshallbeprovidedonthecondensatereturnpipeofeachsteam-consumingequipment(suchaswaterheaterandwaterboiler).Asteamtrapshallalsobeprovidedatthelowestpartoftheverticalsteampipeandthelowerconcavepartofthesteampipe.二、熱水供應(yīng)系統(tǒng)的附件FittingsoftheHotWaterSupplySystem3.減壓閥Pressure-reducingvalve熱水供應(yīng)系統(tǒng)中的加熱器常以蒸汽為熱媒，若蒸汽管道供應(yīng)的壓力大于水加熱器的承壓能力，則應(yīng)設(shè)減壓閥把蒸汽壓力降到需要值，才能保證設(shè)備使用安全。Thesteamisoftenusedastheheatmediuminthehotwatersupplysystem.Ifthepressuresuppliedbythesteampipesisgreaterthanthepressure-bearingcapacityofthewaterheater,apressure-reducingvalveshallbesettoreducethesteampressuretotherequiredvaluesoastoensurethesafeuseoftheequipment.二、熱水供應(yīng)系統(tǒng)的附件FittingsoftheHotWaterSupplySystem4.自動(dòng)排氣閥Automaticexhaustvalve為排除熱水管道系統(tǒng)中熱水汽化產(chǎn)生的氣體（溶解氧和二氧化碳），以保證管內(nèi)熱水暢通，防止管道腐蝕，配水干管和立管最高點(diǎn)應(yīng)設(shè)置排氣閥。Toreleasethegas(dissolvedoxygenandcarbondioxide)generatedduringthevaporizationofhotwaterinthehotwaterpipesystem,ensuresmoothflowofhotwaterinthepipe,andpreventthecorrosionofpipes,anautomaticexhaustvalveshallbesetatthehighestpointofthemainwaterdistributionpipesandstandpipes.

二、熱水供應(yīng)系統(tǒng)的附件FittingsoftheHotWaterSupplySystem5.膨脹管、膨脹水罐和安全閥Expansionpipe,expansiontankandsafetyvalve在集中熱水供應(yīng)系統(tǒng)中，冷水被加熱后，水的體積要膨脹，如果熱水系統(tǒng)是密閉的，在衛(wèi)生器具不用水時(shí)，必然會(huì)增加系統(tǒng)的壓力，有脹裂管道的危險(xiǎn)，因此需要設(shè)置膨脹管、安全閥或膨脹水罐。Inthecentralizedhotwatersupplysystem,aftercoldwaterisheated,thevolumeofwaterwillexpand.Ifthehotwatersystemisclosed,thepressureofthesystemwillinevitablyincreasewhenthesanitarywaredoesnotneedwater,andthereisariskofthepipesbursting.Therefore,itisnecessarytosetexpansionpipes,safetyvalvesorexpansiontanks.安全閥Safetyvalve安全閥Safetyvalve二、熱水供應(yīng)系統(tǒng)的附件FittingsoftheHotWaterSupplySystem6.自然補(bǔ)償管道和伸縮器Naturalcompensationpipeandexpansionpiece熱水供應(yīng)系統(tǒng)中管道因受熱膨脹而伸長，為保證管網(wǎng)使用安全，在熱水管網(wǎng)上應(yīng)采取補(bǔ)償管道溫度伸縮的措施，以避免管道因?yàn)槌惺芰顺^自身所許可的內(nèi)應(yīng)力而導(dǎo)致彎曲甚至破裂。Thepipesinthehotwatersupplysystemelongateduetothermalexpansion.Inordertoensurethesafetyofthenetwork,measuresshallbetakentocompensateforthetemperatureexpansionofthepipesinthehotwaternetworktoavoidbendingorevenruptureofthepipesbecausetheybearaninternalstressexceedingtheirallowablevalue.伸縮器Expansionpiece伸縮器Expansionpiece二、熱水供應(yīng)系統(tǒng)的附件FittingsoftheHotWaterSupplySystem6.自然補(bǔ)償管道和伸縮器Naturalcompensationpipeandexpansionpiece補(bǔ)償管道熱伸長技術(shù)措施有兩種，即自然補(bǔ)償和設(shè)置伸縮器補(bǔ)償。Therearetwotechnicalmeasurestocompensateforthethermalelongationofpipes,namelynaturalcompensationandsettingoftheexpansionpiece.自然補(bǔ)償即利用管道敷設(shè)自然形成的L型或Z型彎曲管段，來補(bǔ)償管道的溫度變形。NaturalcompensationistocompensateforthetemperaturedeformationofpipesbyusingL-shapedorZ-shapedbendingpipesectionsnaturallyformedduringthelayingofpipes.管道自然補(bǔ)償Pipethermalcompensation二、熱水供應(yīng)系統(tǒng)的附件FittingsoftheHotWaterSupplySystem當(dāng)直線管段較長，不能依靠管路彎曲的自然補(bǔ)償作用時(shí)，每隔一定的距離應(yīng)設(shè)置不銹鋼波紋管、波型伸縮器、多球橡膠軟管等伸縮器、可曲撓橡膠接頭來補(bǔ)償管道伸縮量。Whenthestraightpipesectionislongandcannotrelyonthenaturalcompensationofpipesbending,corrugated

stainlesssteelpipes,corrugatedexpansionpieces,multi-ballrubberhoses