自來(lái)水管道流量一覽表管徑經(jīng)驗(yàn)流量一覽戔管徑經(jīng)濟(jì)流量經(jīng)濟(jì)流量經(jīng)濟(jì)流量（F/d）經(jīng)濟(jì)流速Cm/s）備比最低最高景低量高最低平均最與最俏最高150,00020101115015寸20j00,。時(shí)3010202701W4寸250&00050203242011寸320L00080305269011-1/4寸如P00.0013'050S1109011-1/■號(hào)寸5000.002007012717001.?寸7000,00380140249332018000,0050018032643401100ro0,01.1004006789S001.412500,020620106014840L41500,01034090960152621600.621.422000.030.059018421602713441B0.81.623OQ0,050.11LS44034416610496720.721.59傾OT110,23403825567210S522D04C0.891.856000,230.518351822200^02-141743?尊0.82L79市政給水管管徑市政給水管管徑，一般用PE,口徑從20mm-620mm。一般是按水泵出口口徑選配水管的管徑；水泵連接的出水管不是管徑越大越好，選的管徑能滿足流量的要求而且阻力損失又合理時(shí)為好。鍍鋅管是按內(nèi)徑計(jì)算的，內(nèi)徑15mm=4分管,20mm=6分,25mm=1寸;PPR管/鋁塑管則是按內(nèi)徑計(jì)算的,16mm也就相當(dāng)于3分管,20mm差不多相當(dāng)于4分的。鍍鋅管徑一般工程上計(jì)算時(shí)，水管路，壓力常見(jiàn)為0.1--0.6MPa，水在水管中流速在1--3米/秒，常取1.5米/秒。流量=管截面積X流速=0.002827X管徑A2X流速（立方米/小時(shí)尸2:平方。管徑單位：mm管徑=sqrt（353.68X流量/流速）；sqrt:開(kāi)平方；飽和蒸汽的公式與水相同，只是流速一般取20--40米/秒。水流量計(jì)算表DN15、DN25、DN50管道的流量各為多少？DN15、DN25、DN50管徑的截面積分別為：DN15:152*3.14/4=176.625平方毫米，合0.0177平方分米。DN25:252*3.14/4=490.625平方毫米，合0.0491平方分米。DN50:502*3.14/4=1962.5平方毫米，合0.1963平方分米。設(shè)管道流速為/=4米/秒，即V=40分米/秒，且1升=1立方分米，則管道的流量分別為截面積乘以流速）：DN15管道：流量0=0.0177*40=0.708升/秒，合2.55立方米/小時(shí)。DN25管道：流量0=0.0491*40=1.964升/秒，合7.07立方米/小時(shí)。DN50管道：流量0=0.1963*40=7.852升/秒，合28.27立方米/小時(shí)。注：必須給定流速才能計(jì)算流量，上述是按米/秒計(jì)算的。管徑與流速、流量的計(jì)算方法一虹程上計(jì)算時(shí)，水管路，壓力^為0.1--0.6MPa水在水管中流速在~3米渺，常取1.5米/秒。流量=管截面積x流速=0.002827：管密2x流速（立方米小時(shí)）水壓在0.2mpa，流量是15立方每小時(shí)，要用的管徑是多少0.2Mpa的水壓全部轉(zhuǎn)換為動(dòng)能，速度為20m/s,體積流量為15mA3/h，可換算為0.0042mA3/s,則管道面積為：0.0042/20=0.00021m〃2=210mmA2，管路直徑為16.3mm,考慮到壓力損失，選擇20mm的管路就差不多了流量=流速流通面積。而根據(jù)管道水流量計(jì)算公式0=（H/sL）1/2流量與管道長(zhǎng)度存在關(guān)系，請(qǐng)問(wèn)怎么理解？流量=流速過(guò)流面積根據(jù)管道水流量計(jì)算公式0=VXSV---液體流動(dòng)的流速S---過(guò)流斷面的面積L---是流量的單位為每秒升流量與管道長(zhǎng)度不存在關(guān)系它指的是單位時(shí)間內(nèi)通過(guò)某一斷面液體的數(shù)量，與長(zhǎng)度沒(méi)有關(guān)系。

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