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1、管径/流速/流量对照表管径（DN）0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6 m/s1.8 m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s流速对应流量m3/h200.50.70.91.11.41.61.82.02.32.52.72.93.23.4250.71.11.41.82.12.52.83.23.53.94.24.64.95.3321.21.72.32.93.54.14.65.25.86.46.97.58.18.7401.82.73.64.55.46.37.28.19.010.010.911.812.713.6502.84
2、.25.77.18.59.911.312.714.115.617.018.419.821.2654.87.29.611.914.316.719.121.523.926.328.731.133.435.8807.210.914.518.121.725.329.032.636.239.843.447.050.754.310011.317.022.628.333.939.645.250.956.562.267.973.579.284.812517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.515025.438.250.963.67
3、6.389.1101.8114.5127.2140.0152.7165.4178.1190.920045.267.990.5113.1135.7158.3181.0208.6226.2248.8271.4294.1316.7339.325070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1489.5494.8530.1300101.8152.7208.6254.5305.4386.3407.1488.0508.9589.8640.7661.6712.5763.4350138.5207.8277.1346.4415.6484.9554.2
4、623.4692.7762.0831.3900.5989.81089.1400181.0271.4381.9462.4542.9633.3723.8814.3904.8995.31085.71176.21286.71357.2管径（DN）流速推荐值m/s：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0.4-0.50.5-0.60.6-0.80.7-0.90.8-1.00.9-1.21.1-1.41.2-1.61.4-1.81.5-2.01.6-2.31.7-2.41.7-2.41.6-2.11.8-2.32 管道内流体常用流速范围和一般工程设计中的压力降控制值2.1 管道内各种介质常用流速范围管道内各种介质常用流速范围见表2.1。表中管道的材质除注明外，一律为钢。该表中流速为推荐值。2.2 管道压力降控制值 管道压力降控制值见表2.21和表2.22。该表中压力降值为推荐值。注：表中P为管道进口端的流体之压力（绝对压力）
