管径流量流速对照表
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s
200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
350138.5207.8277.1346.4415.6484.9554.2623.4692.7762.0831.3900.5969.81039.1
400181.0271.4361.9452.4542.9633.3723.8814.3904.8995.31085.71176.21266.71357.2
450229.0343.5458.0572.6687.1801.6916.11030.61145.11259.61374.11488.61603.21717.7
500282.7424.1565.5706.9848.2989.61131.01272.31413.71555.11696.51837.81979.22120.6
600407.1610.7814.31017.91221.41425.01628.61832.22035.72239.32442.92646.52850.03053.6
20253240506580100125150200250300350400
闭式系统0.5-0.60.6-0.70.7-0.90.8-10.9-1.21.1-1.41.2-1.61.3-1.81.5-2.01.6-2.21.8-2.51.8-2.61.9-2.91.6-2.51.8-2.6
开式系统0.4-0.50.5-0.60.6-0.80.7-0.90.8-1.00.9-1.21.1-1.41.2-1.61.4-1.81.5-2.01.6-2.31.7-2.41.7-2.41.6-2.11.8-2.3管径/流速/流量对照表
流量 m3/h
流速推荐值m/s:管径(DN)
管径(DN)现只考虑压力能全部转化为动量，可推出： Q=πR^2√(2P/ρ)式中，Q为流量，R为管半径，P的压力，ρ为液体密度。1.0mpa蒸汽流速40-50m/s4.2蒸汽密度kg/m3
30速度m/s
6吨
1.666666667kg/s
126kg/(m2*s)
0.013227513m2
0.016850335d2
0.129808841d
水管管径-流速-流量对照表
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s
200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
管径-流速-流量对照表
管径/流速/流量对照表
已知流量、管材，如何求管径？
分两种情形：
1、水源水压末定，根据合理流速V（或经济流速）确定管径d：
d=√[4q/(πV)] (根据计算数值，靠近选取标准管径）
2、已知管道长度及两端压差，确定管径
流量q不但与管内径d有关，还与单位长度管道的压力降落（压力坡度）
i有关, i=(P1-P2)/L.具体关系式可以推导如下：
管道的压力坡度可用舍维列夫公式计算 i=0.0107V^2/d^1.3——（1）
管道的流量 q=(πd^2/4)V ——（2）
上二式消去流速V得： q = 7.59d^2.65√i (i 以kPa/m为单位）
管径：d=0.4654q^0.3774/i^0.1887 (d 以m为单位）
这就是已知管道的流量、压力坡度求管径的公式。
例：某管道长100m，管道起端压力P1=96kPa，末端压力P2=20kPa，要
求管道过1.31 L/s的流量，试确定管径压力坡度 i=(P1-P2)/L=(96-20)/100=0.76kPa/m
流量 q=1.31 L/s=0.00131 m^3/s
管径 d=0.4654q^0.3774/i^0.1887 =0.4654*0.00131^0.3774/0.76^0.1887=
0.0400m =400mm
还可用海森威廉公式：i=105C^(-1.85)q ^1.85/d^4.87 ( i 单位为 kPa/m )
钢管、铸铁管：C=100， i=0.02095q ^1.85/d^4.87 ，q =8.08d^2.63 i
^0.54
铜管、不锈钢管：C=130，i=0.01289q ^1.85/d^4.87 ，q =10.51d^2.63 i
^0.54
塑料管： C=140，i=0.01124q ^1.85/d^4.87 ，q =11.31d^2.63 i
^0.54
C=150，i=0.009895q ^1.85/d^4.87 ，q =12.12d^2.63 i ^0.54
管径流速流量对照表
管径/流速/流量对照表
管径
（DN） 0.4m/s 0.6m/s 0.8m/s 1.0m/s 1.2m/s 1.4m/s 1.6 m/s 1.8 m/s 2.0m/s 2.2m/s 2.4m/s 2.6m/s 2.8m/s 3.0m/s
流速对应流量m3/h
20 0.5 0.7 0.9 1.1 1.4 1.6 1.8 2.0 2.3 2.5 2.7 2.9 3.2 3.4
25 0.7 1.1 1.4 1.8 2.1 2.5 2.8 3.2 3.5 3.9 4.2 4.6 4.9 5.3
32 1.2 1.7 2.3 2.9 3.5 4.1 4.6 5.2 5.8 6.4 6.9 7.5 8.1 8.7
40 1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0 10.0 10.9 11.8 12.7 13.6
50 2.8 4.2 5.7 7.1 8.5 9.9 11.3 12.7 14.1 15.6 17.0 18.4 19.8 21.2
65 4.8 7.2 9.6 11.9 14.3 16.7 19.1 21.5 23.9 26.3 28.7 31.1 33.4 35.8
80 7.2 10.9 14.5 18.1 21.7 25.3 29.0 32.6 36.2 39.8 43.4 47.0 50.7 54.3
100 11.3 17.0 22.6 28.3 33.9 39.6 45.2 50.9 56.5 62.2 67.9 73.5 79.2 84.8
125 17.7 26.5 35.3 44.2 53.0 61.9 70.7 79.5 88.4 97.2 106.0 114.9 123.7 132.5
150 25.4 38.2 50.9 63.6 76.3 89.1 101.8 114.5 127.2 140.0 152.7 165.4 178.1 190.9
空调水管管径流量对照表(表内带公式及推荐流速)
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s内面积m2
200.50.70.91.11.41.61.82.02.32.52.72.93.23.40.000314
250.71.11.41.82.12.52.83.23.53.94.24.64.95.30.000491
321.21.72.32.93.54.14.65.25.86.46.97.58.18.70.000804
401.82.73.64.55.46.37.28.19.010.010.911.812.713.60.001257
502.84.25.77.18.59.911.312.714.115.617.018.419.821.20.001963
654.87.29.611.914.316.719.121.523.926.328.731.133.435.80.003318
807.210.914.518.121.725.329.032.636.239.843.447.050.754.30.005027
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.80.007854
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.50.012272
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.90.017671
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.30.031416
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.10.049087
空压气 流速、管径、流量对照表
流速202532405065801001251502002503006.00.81.22.03.24.98.412.719.830.944.579.1123.6178.07.00.91.42.43.75.89.814.823.136.151.992.3144.2207.78.01.11.62.74.26.611.116.926.441.259.3105.5164.9237.49.01.21.93.04.77.412.519.029.746.466.8118.7185.5267.110.01.32.13.45.38.213.921.133.051.574.2131.9206.1296.711.01.52.33.75.89.115.323.236.356.781.6145.1226.7326.412.01.62.54.16.39.916.725.339.661.889.0158.3247.3356.113.01.72.74.46.910.718.127.442.967.096.4171.4267.9385.714.01.82.94.77.411.519.529.546.272.1103.9184.6288.5415.415.02.03.15.17.912.420.931.749.577.3111.3197.8309.1445.116.02.13.35.48.413.222.333.852.882.4118.7211.0329.7474.817.00.20.51.01.93.78.115.129.657.799.8236.5462.0798.318.02.43.76.19.514.825.138.059.392.7133.5237.4370.9534.119.02.53.96.410.015.726.540.162.697.9140.9250.6391.5563.820.02.64.16.810.616.527.942.265.9103.0148.4263.8412.1593.521.02.84.37.111.117.329.344.369.2108.2155.8276.9432.7623.122.02.94.57.411.618.130.646.472.5113.3163.2290.1453.3652.823.03.04.77.812.119.032.048.575.8118.5170.6303.3473.9682.524.03.24.98.112.719.833.450.679.1123.6178.0316.5494.6712.225.03.35.28.413.220.634.852.882.4128.8185.5329.7515.2741.826.03.45.48.813.721.436.254.985.7133.9192.9342.9535.8771.527.03.65.69.114.222.337.657.089.0139.1200.3356.1556.4801.228.03.75.89.514.823.139.059.192.3144.2207.7369.3577.0830.829.03.86.09.815.323.940.461.295.6149.4215.1382.5597.6860.530.04.06.210.115.824.741.863.398.9154.5222.5395.6618.2890.2空压气压力为0.5MPa时的流速/管径/流量（对照表（管径3504004505006007008009001000242.3316.5400.6494.6712.2969.31266.01602.31978.2282.7369.3467.3577.0830.81130.91477.11869.42307.9323.1422.0534.1659.4949.51292.41688.12136.52637.6363.5474.8600.9741.81068.21454.01899.12403.52967.3403.9527.5667.6824.31186.91615.52110.12670.63297.0444.3580.3734.4906.71305.61777.12321.12937.63626.7484.7633.0801.2989.11424.31938.62532.13204.73956.4525.0685.8867.91071.51543.02100.22743.13471.74286.1565.4738.5934.71154.01661.72261.72954.13738.84615.8605.8791.31001.51236.41780.42423.33165.14005.94945.5646.2844.01068.21318.81899.12584.83376.14272.95275.21267.71892.32694.33695.96386.510141.515138.321554.329567.0727.0949.51201.81483.72136.52908.03798.14807.05934.6767.41002.31268.51566.12255.13069.54009.25074.16264.3807.81055.01335.31648.52373.83231.14220.25341.16594.0848.21107.81402.01730.92492.53392.64431.25608.26923.7888.51160.51468.81813.42611.23554.24642.25875.37253.4928.91213.31535.61895.82729.93715.74853.26142.37583.1969.31266.01602.31978.22848.63877.35064.26409.47912.81009.71318.81669.12060.62967.34038.85275.26676.48242.51050.11371.61735.92143.13086.04200.45486.26943.58572.21090.51424.31802.62225.53204.74361.95697.27210.58901.91130.91477.11869.42307.93323.44523.55908.27477.69231.61171.31529.81936.22390.33442.14685.06119.27744.79561.31211.61582.62002.92472.83560.84846.66330.28011.79891.0（管径DN,流速单位m/s，流量单位kg/h）
水管管径-流速-流量对照表 2
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s
200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
水管管径-流速-流量对照表 3
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s
200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
水管管径-流速-流量对照表 4
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s200.50.70.91.11.41.61.82.02.32.52.72.93.23.4250.71.11.41.82.12.52.83.23.53.94.24.64.95.3321.21.72.32.93.54.14.65.25.86.46.97.58.18.7401.82.73.64.55.46.37.28.19.010.010.911.812.713.6502.84.25.77.18.59.911.312.714.115.617.018.419.821.2654.87.29.611.914.316.719.121.523.926.328.731.133.435.8807.210.914.518.121.725.329.032.636.239.843.447.050.754.310011.317.022.628.333.939.645.250.956.562.267.973.579.284.812517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.515025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.920045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.325070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4350138.5207.8277.1346.4415.6484.9554.2623.4692.7762.0831.3900.5969.81039.1400181.0271.4361.9452.4542.9633.3723.8814.3904.8995.31085.71176.21266.71357.2450229.0343.5458.0572.6687.1801.6916.11030.61145.11259.61374.11488.61603.21717.7500282.7424.1565.5706.9848.2989.61131.01272.31413.71555.11696.51837.81979.22120.6600407.1610.7814.31017.91221.41425.01628.61832.22035.72239.32442.92646.52850.03053.6
水管管径-流速-流量对照表 5
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s
200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
管道流量流速对照表
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s200.50.70.91.11.41.61.822.32.52.72.93.23.4250.71.11.41.82.12.52.83.23.53.94.24.64.95.3321.21.72.32.93.54.14.65.25.86.46.97.58.18.7401.82.73.64.55.46.37.28.191010.911.812.713.6502.84.25.77.18.59.911.312.714.115.61718.419.821.2654.87.29.611.914.316.719.121.523.926.328.731.133.435.8807.210.914.518.121.725.32932.636.239.843.44750.754.310011.31722.628.333.939.645.250.956.562.267.973.579.284.812517.726.535.344.25361.970.779.588.497.2106114.9123.7132.515025.438.250.963.676.389.1101.8114.5127.2140152.7165.4178.1190.920045.267.990.5113.1135.7158.3181203.6226.2248.8271.4294.1316.7339.325070.7106141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1300101.8152.7203.6254.5305.4356.3407.1458508.9559.8610.7661.6712.5763.4350138.5207.8277.1346.4415.6484.9554.2623.4692.7762831.3900.5969.81039.1400181271.4361.9452.4542.9633.3723.8814.3904.8995.31085.71176.21266.71357.2450229343.5458572.6687.1801.6916.11030.61145.11259.61374.11488.61603.21717.7500282.7424.1565.5706.9848.2989.611311272.31413.71555.11696.51837.81979.22120.6600407.1610.7814.31017.91221.414251628.61832.22035.72239.32442.92646.528503053.620253240506580100125150200250300350闭式系统0.5-0.60.6-0.70.8-1.01.0-1.21.1-1.41.1-1.41.2-1.61.3-1.81.5-2.01.6-2.21.8-2.51.8-2.61.9-2.91.6-2.5开式系统0.4-0.50.5-0.60.6-0.80.7-0.90.8-1.00.9-1.21.1-1.41.2-1.61.4-1.81.5-2.01.6-2.31.7-2.41.7-2.41.6-2.1管径/流速/流量对照表管径(DN)流量 m3/h