自来水管计算表

τυτυτυτυ(l/s)(t/h)0.20.7221.300.380.41.4444.200.565.420.240.62.16159.001.1318.400.485.160.280.82.88279.001.5131.400.648.520.382.530.231.03.60437.001.8847.300.8012.900.473.760.281.24.32629.002.2666.300.9518.000.565.180.341.45.04856.002.6488.401.1123.700.666.830.401.65.761118.003.01114.001.2730.400.758.700.451.86.48144.001.4337.800.8510.700.512.07.20178.001.5946.000.9413.000.572.69.36301.002.0774.901.2221.000.743.010.80400.002.3999.801.4127.440.853.612.96577.002.86144.001.6938.401.024.014.40177.001.8846.801.134.616.56235.002.1761.201.305.018.00277.002.3572.301.425.620.16348.002.6490.701.596.021.60399.002.82104.001.70（ 2 ）计算法 根据计算而得的某一管段的最大用水量Qι ，再将μ =1.5m/s和 2.0m/s分别代入公式，则可计算出两个管注：μ ----流速（m/s） τ ---- 单位管长水头损失（m/km或 mm/m）25405070（ 1 ）查表法 当计算出供水管网中各段的最大用水量后，则可依据供水管中水的经济流速μ =（ 1.5~ 2.0m/s）查表选择经济流速范围内的标准规格的供水管或与之接近的供水管。 给水钢管计算表管径d(mm)流量q式中: Dι ----某一管段的供水直径(mm) Qι ----该管段的用水量(L/s) μ -----管网中水流速度(m/s);一般取经济流速1.5~ 2.0米 .径，选择两个计算管径中间的标准规格的水管即可；如果没有这种规格的水管，也可选用直径接近的水管。4000 QiDiumminmminmminmminmm81/4”203/4”401 1/2”803”150103/8”251”502”1004”200151/2”321 1/4”652 1/2”1255”250管径（ DN）常数管径(D2/4)流速(V)常数流量（t/h）损失50m/Kw计153.140.00005625136000.64203.140.0001136001.13253.140.00015625136001.77323.140.000256136002.89403.140.0004136004.52503.140.000625136007.07703.140.0012251360013.85803.140.00161360018.091003.140.00251360028.261253.140.003906251360044.161503.140.0056251360063.592003.140.0113600113.042503.140.01562513600176.633003.140.022513600254.34544003.140.0413600452.162525003.140.062513600706.505076003.140.09136001017.368177003.140.1225136001384.7411858003.140.16136001808.6416099003.140.2025136002289.06208910003.140.25136002826.002626管径（ DN）常数管径(D2/4)流速(V)常数流量（t/h）损失...