管径流速流量对照表

1 / 6 （蒸汽）管道管径计算公式

与管径温度压力流量对照选型表

一、管径、温度、压力、流量对照表：

2 / 6 二、蒸汽管道管径计算公式：

1、DN---管道内径mm；

2、G-----介质质量流量t/h;

3、V-----介质比容m3/kg；（查蒸汽表）。

4、W----介质流速m/s，常规30m/s。

三、管径、压力、流速、流量计算公式：

1、水管流速和压力的计算公式：流速=流量、管道截面积。假设流量为S立方米每秒，圆形管道内半径R米，则流速v：v=S每（3.14×RR）。

2、流量=流速×（管道内径×管道内径×π÷4），管道内径=sqrt(353.68X流量、流速)，sqrt：开平方。

3、流体在一定时间内通过某一横断面的容积或重量称为流量。用容积表示流量单位是L每s或（`m^3`每h），用重量表示流量单位是kg每s或t每h。

4、流体在管道内流动时，在一定时间内所流过的距离为流速，流速一般指流体的平均流速，单位为m每s。

四、蒸汽压力流速、流量、管径关系对照表：

流量（kg/hour） 管道口径 Pipe Size（mm） DN＿ 3 / 6 蒸汽压力（bar） 蒸汽流速（m/s） 15 20 25 32 40 50 65 80 100 125 150 200 250 300

0.4 15 7 14 24 37 52 99 145 213 394 648 917 1606 2590 3680

25 10 25 40 62 92 162 265 384 675 972 1457 2806 4101 5936

40 17 35 64 102 142 265 403 576 1037 1670 2303 4318 6909 9500

0.7 15 7 16 25 40 59 109 166 250 431 680 1006 1708 2791 3852

25 12 25 45 72 100 182 287 430 716 1145 1575 2816 4629 6204

管径(DN)

DN0.4m/s0.6m/s 0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s 2.4m/s2.6m/s2.8m/s3.0m/s

20（25）0.50.70.91.11.41.61.822.32.52.72.93.23.4

25（32）0.71.11.41.82.12.52.83.23.53.94.24.64.95.3

32（40）1.21.72.32.93.54.14.65.25.86.46.97.58.18.7

40（50）1.82.73.64.55.46.37.28.191010.911.812.713.6

50（63）2.84.25.77.18.59.911.312.714.115.61718.419.821.2

65（80）4.87.29.611.914.316.719.121.523.926.328.731.133.435.8

807.210.914.518.121.725.32932.636.239.843.44750.754.3

10011.31722.628.333.939.645.250.956.562.267.973.579.284.8

12517.726.535.344.25361.970.779.588.497.2106114.9123.7132.5

15025.438.250.963.676.389.1101.8114.5127.2140152.7165.4178.1190.9

20045.267.990.5113.1135.7158.3181203.6226.2248.8271.4294.1316.7339.3

25070.7106141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1

300101.8152.7203.6254.5305.4356.3407.1458508.9559.8610.7661.6712.5763.4

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/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

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