自来水管道流量一览表

自来水管道流量一览表管径经验流量一览戋管径经济流量经济流量经济流量（F/d）经济流速Cm/s）备比最低最高景低量高最低平均最与最俏最高150,00020101115015寸20j00,。时3010202701W4寸250&00050203242011寸320L00080305269011-1/4寸如P00.0013'050S1109011-1/■号寸5000.002007012717001.?寸7000,00380140249332018000,0050018032643401100ro0,01.1004006789S001.412500,020620106014840L41500,01034090960152621600.621.422000.030.059018421602713441B0.81.623OQ0,050.11LS44034416610496720.721.59倾OT110,23403825567210S522D04C0.891.856000,230.518351822200^02-141743?尊0.82L79市政给水管管径市政给水管管径，一般用PE,口径从20mm-620mm。一般是按水泵出口口径选配水管的管径；水泵连接的出水管不是管径越大越好，选的管径能满足流量的要求而且阻力损失又合理时为好。镀锌管是按内径计算的，内径15mm=4分管,20mm=6分,25mm=1寸;PPR管/铝塑管则是按内径计算的,16mm也就相当于3分管,20mm差不多相当于4分的。镀锌管径一般工程上计算时，水管路，压力常见为0.1--0.6MPa，水在水管中流速在1--3米/秒，常取1.5米/秒。流量=管截面积X流速=0.002827X管径A2X流速（立方米/小时尸2:平方。管径单位：mm管径=sqrt（353.68X流量/流速）；sqrt:开平方；饱和蒸汽的公式与水相同，只是流速一般取20--40米/秒。水流量计算表DN15、DN25、DN50管道的流量各为多少？DN15、DN25、DN50管径的截面积分别为：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。设管道流速为/=4米/秒，即V=40分米/秒，且1升=1立方分米，则管道的流量分别为截面积乘以流速）：DN15管道：流量0=0.0177*40=0.708升/秒，合2.55立方米/小时。DN25管道：流量0=0.0491*40=1.964升/秒，合7.07立方米/小时。DN50管道：流量0=0.1963*40=7.852升/秒，合28.27立方米/小时。注：必须给定流速才能计算流量，上述是按米/秒计算的。管径与流速、流量的计算方法一虹程上计算时，水管路，压力^为0.1--0.6MPa水在水管中流速在~3米渺，常取1.5米/秒。流量=管截面积x流速=0.002827：管密2x流速（立方米小时）水压在0.2mpa，流量是15立方每小时，要用的管径是多少0.2Mpa的水压全部转换为动能，速度为20m/s,体积流量为15mA3/h，可换算为0.0042mA3/s,则管道面积为：0.0042/20=0.00021m〃2=210mmA2，管路直径为16.3mm,考虑到压力损失，选择20mm的管路就差不多了流量=流速流通面积。而根据管道水流量计算公式0=（H/sL）1/2流量与管道长度存在关系，请问怎么理解？流量=流速过流面积根据管道水流量计算公式0=VXSV---液体流动的流速S---过流断面的面积L---是流量的单位为每秒升流量与管道长度不存在关系它指的是单位时间内通过某一断面液体的数量，与长度没有关系。

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