管径-流速-流量对照表

1、管径/流速/流量对照表k,卜1|_511总总丈2/"5hmeT7管径/流速/流量对照表管径(DN)克量if/h0.4nVsO.dm/sD.8m/sl.Clm/s1.2m/s1.4m/sl.dm/s2.Otn/s2.2m/s2.4m/s'2.dtn/s.-.2.Site's3.0m/s0.50.7.0.91.11.41.61.82：Ci2.32.52.7.2.93.23.4.?&0.71.11.4.1.8、加.2.5-2.-83；23.53.94.2.4.6、4.55.-?32：1.21.72.3.2.0饗54.14.65.25.|6.46.97.5、8.18.

2、7401.82.T.3.64.55.4-氐;37.28.19.010.010.911.812=.713.6'50',04.-.Z'5.'77.1S.59.9-11.31:714.：115.617.IS.a19.S21.2-6&'4.87.2.9.611.014.315.719.121.523.326.328.T31.133.435.8&0'7.210.9.直.518.121.725.3阻636,|35.S45.447.0.50.75"130；.11.317.0.22：628.33-3.933.-S<5.250.95

3、6.562.267.973.679.284.812&.17.726.5.35.344.-253.a61.9-70.779.5SS.497.'2_106.0.114.91週713-2.5150；.25.438.250.963.6T6.389.1101.8114.5127.2140.0152.T165.4.178.1190.945.267.990.5113r1135.7158.3101.0205.6鄭2248.8271.4294.1316.7339.-J56'.70.7106.0141.4176.721典1247.42B2.7318.1353.4388.8424.1.4S9

4、.5494.8530.1300；.101.0152.T.203.6254.5305.4356.340714500505.9559S610.T.661.6T12=.5T63.-4350；13S.5207.8.27T.1346.4415.5484.9554.2620.4692.7T62.0Sl.3900.5369.81039.14M',101.0271.4.-361.-9452.454热9633.3Tq；8814.3904.|995.3.10S5.7.1175.21206.71357.2450；.22-9.0J43.5.458.572：6687.1801.6916.11030.6:1145

5、.11259.61374.1.1488.61S03.；21717.7500；.282,74誣1.565.BT06.9048.29S9.61151.0,1272.-3:1413.71555.11696.5.1837.3、1979.22120.S600407.1610.781431017.91221.41425.01628.61832.22035.72239.32442.92646.52860.03053.6ffito99T百:'孩Uh桂至【定栄网-m.DDOVE.cafii钢管公称通径、外径、壁厚、连接螺纹現推荐流量表称通径钢管外径/jTJR管接头连接幌级加i公称压±Pe/MP

6、a&推荐管路通过流童/:(L/nin)g尹5"s162531.5nunln管子壁厚加3611111.40?63481111.41.4.让顷6l/s101111.61.66.；381/414疏14T.5111.6222510；123/SISMlSl.511.61.62.2.540152Z陇加1.51.61.62.：2.536320-3/4281.622.53.E41Q0251342.：.任：%4.55160烫1144222.545625Q40'112'50MSX2'.-2.54.55.5740'050-63MS嚎:込3:冷556.5S.56306

7、5275.5468101.WQso390457101-2；12501001412Cn.T8.5边.50Q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=74q/（nV）（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=0.0107VA2/dA1.3（1）管道的流量q=（ndA2/4）V（2）上二式消去流速V得：q=7.59dA2.65i（i以kPa/m为单位）管径：

8、d=0.4654qA0.3774/iA0.1887（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1.31L/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=1.31L/s=0.00131mA3/s管径d=0.4654qA0.3774/iA0.1887=0.4654*0.00131八0.3774/0.76八0.1887=0.0400m=400mm还可用海森威廉公式：i=105CW-1.85)qA1.85/dA4.87(i单位为kPa/m)钢管、铸铁管：C=100,i=0.02095qA1.85/dA4.87,q=8.08dA2.63iA0.54铜管、不锈钢管：C=130,i=0.01289qA1.