管径 流量流速0.10.110.180.290.450.711.191.812.834.426.3611.3117.6725.4534.6445.2457.2670.69101.79

0.20.230.350.580.901.412.393.625.658.8412.7222.6235.3450.8969.2790.48114.51141.37203.58

0.30.340.530.871.362.123.585.438.4813.2519.0933.9353.0176.34103.91135.72171.77212.06305.36

0.40.450.711.161.812.834.787.2411.3117.6725.4545.2470.69101.79138.54180.96229.02282.74407.15

0.50.570.881.452.263.535.979.0514.1422.0931.8156.5588.36127.23173.18226.19286.28353.43508.94

0.60.681.061.742.714.247.1710.8616.9626.5138.1767.86106.03152.68207.82271.43343.53424.12610.73

0.70.791.242.033.174.958.3612.6719.7930.9344.5379.17123.70178.13242.45316.67400.79494.80712.51

0.80.901.412.323.625.659.5614.4822.6235.3450.8990.48141.37203.58277.09361.91458.04565.49814.30

0.91.021.592.614.076.3610.7516.2925.4539.7657.26101.79159.04229.02311.72407.15515.30636.17916.09

11.131.772.904.527.0711.9518.1028.2744.1863.62113.10176.71254.47346.36452.39572.56706.861017.88

1.11.241.943.184.987.7813.1419.9131.1048.6069.98124.41194.39279.92381.00497.63629.81777.541119.66

1.21.362.123.475.438.4814.3421.7133.9353.0176.34135.72212.06305.36415.63542.87687.07848.231221.45

1.31.472.303.765.889.1915.5323.5236.7657.4382.70147.03229.73330.81450.27588.11744.32918.921323.24

1.41.582.474.056.339.9016.7225.3339.5861.8589.06158.34247.40356.26484.90633.35801.58989.601425.03

1.51.702.654.346.7910.6017.9227.1442.4166.2795.43169.65265.07381.70519.54678.58858.831060.291526.81

1.61.812.834.637.2411.3119.1128.9545.2470.69101.79180.96282.74407.15554.18723.82916.091130.971628.60

1.71.923.004.927.6912.0220.3130.7648.0775.10108.15192.27300.41432.60588.81769.06973.341201.661730.39

1.82.043.185.218.1412.7221.5032.5750.8979.52114.51203.58318.09458.04623.45814.301030.601272.351832.18

1.92.153.365.508.6013.4322.7034.3853.7283.94120.87214.88335.76483.49658.09859.541087.851343.031933.96

22.263.535.799.0514.1423.8936.1956.5588.36127.23226.19353.43508.94692.72904.781145.111413.722035.75

2.12.383.716.089.5014.8425.0938.0059.3892.78133.60237.50371.10534.38727.36950.021202.371484.402137.54

2.22.493.896.379.9515.5526.2839.8162.2097.19139.96248.81388.77559.83761.99995.261259.621555.092239.33

2.32.604.066.6610.4016.2627.4841.6265.03101.61146.32260.12406.44585.28796.631040.501316.881625.772341.11

2.42.714.246.9510.8616.9628.6743.4367.86106.03152.68271.43424.12610.73831.271085.731374.131696.462442.90656005020080150500管径/流速/流量对照表 1

管径单位：DN 流速单位：m/s 流量单位：m3/h 圆周率（π）：3.1415926

20253240250100管 道 管 径 规 格 大 小（DN）

300350400450125

管径

流量

流速

2.52.834.427.2411.3117.6729.8645.2470.69110.45159.04282.74441.79636.17865.901130.971431.391767.152544.69

2.62.944.597.5311.7618.3831.0647.0573.51114.86165.40294.05459.46661.62900.541176.211488.641837.832646.48

2.73.054.777.8212.2119.0932.2548.8676.34119.28171.77305.36477.13687.07935.171221.451545.901908.522748.27

2.83.174.958.1112.6719.7933.4550.6779.17123.70178.13316.67494.80712.51969.811266.691603.151979.202850.05

2.93.285.128.4013.1220.5034.6452.4882.00128.12184.49327.98512.47737.961004.451311.931660.412049.892951.84

33.395.308.6913.5721.2135.8454.2984.82132.54190.85339.29530.14763.411039.081357.171717.672120.583053.63

3.13.515.488.9814.0221.9137.0356.1087.65136.95197.21350.60547.82788.851073.721402.411774.922191.263155.42

3.23.625.659.2614.4822.6238.2357.9190.48141.37203.58361.91565.49814.301108.351447.651832.182261.953257.20

3.33.735.839.5514.9323.3339.4259.7293.31145.79209.94373.22583.16839.751142.991492.881889.432332.633358.99

3.43.856.019.8415.3824.0340.6261.5296.13150.21216.30384.53600.83865.191177.631538.121946.692403.323460.78

3.53.966.1910.1315.8324.7441.8163.3398.96154.63222.66395.84618.50890.641212.261583.362003.942474.003562.57

3.64.076.3610.4216.2925.4543.0165.14101.79159.04229.02407.15636.17916.091246.901628.602061.202544.693664.35

3.74.186.5410.7116.7426.1544.2066.95104.62163.46235.38418.46653.84941.541281.531673.842118.452615.383766.14

3.84.306.7211.0017.1926.8645.3968.76107.44167.88241.75429.77671.52966.981316.171719.082175.712686.063867.93

3.94.416.8911.2917.6427.5746.5970.57110.27172.30248.11441.08689.19992.431350.811764.322232.972756.753969.72

44.527.0711.5818.1028.2747.7872.38113.10176.71254.47452.39706.861017.881385.441809.562290.222827.434071.50

4.14.647.2511.8718.5528.9848.9874.19115.92181.13260.83463.70724.531043.321420.081854.802347.482898.124173.29

4.24.757.4212.1619.0029.6950.1776.00118.75185.55267.19475.01742.201068.771454.711900.042404.732968.814275.08

4.34.867.6012.4519.4530.3951.3777.81121.58189.97273.55486.32759.871094.221489.351945.272461.993039.494376.87

4.44.987.7812.7419.9131.1052.5679.62124.41194.39279.92497.63777.541119.661523.991990.512519.243110.184478.65

4.55.097.9513.0320.3631.8153.7681.43127.23198.80286.28508.94795.221145.111558.622035.752576.503180.864580.44

4.65.208.1313.3220.8132.5254.9583.24130.06203.22292.64520.25812.891170.561593.262080.992633.753251.554682.23

4.75.328.3113.6121.2633.2256.1585.05132.89207.64299.00531.56830.561196.001627.892126.232691.013322.234784.02

4.85.438.4813.9021.7133.9357.3486.86135.72212.06305.36542.87848.231221.451662.532171.472748.273392.924885.8015020010012540506580250300350400管径/流速/流量对照表 2

管径单位：DN 流速单位：m/s 流量单位：m3/h 圆周率（π）：3.1415926管 道 管 径 规 格 大 小（DN）

202532450500600