化工管道流速選擇原則

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1、管道尺寸選擇原則一、液體工藝介質(zhì)類別最大允許壓降流速kg/cm2/100mm/s(1)一般0.921.5~4.6液體密度<1600kg/cm21.5~2.4液體密度<800kg/cm21.8~3.0液體密度<320kg/cm23.0~4.6粘度(cp)管徑(mm)0.1~0.51.0250.5~1.1500.7~1.51001.0~2.050.0250.5~0.9500.7~1.01001.0~1.6100.0250.3~0.6500.5~0.71000.7~1.02001.2~1.61000.0250

2、.1~0.2500.16~0.251000.25~0.352000.35~0.55(2)泵吸入口飽和液體0.120.6~1.8過(guò)冷液體0.231.2~2.4(3)泵排出口0～60m3/h1.381.8~2.460～160m3/h0.922.4~3.0>160m3/h0.463.0~4.6(4)容器、塔器底部排出管線0.141.2~1.8(5)再沸器入口0.030.3~1.2(6)冷凝器出口0.110.9~1.8(7)冷卻管線0.090.6~1.2(8)塔器供液管線0.141.2~1.8二、氣體工藝介質(zhì)類

3、別最大允許壓降流速kg/cm2/100mm/s(1)一般壓力等級(jí)>35.0kg/cm2G0.467.0~20.014.0~35.0kg/cm2G0.357.0~20.010.5~14.0kg/cm2G0.147.0~20.03.5~10.5kg/cm2G0.0710.0~30.00.0~3.5kg/cm2G0.0310.0~30.0真空0.0210.0~30.0換氣用風(fēng)道橫置4.0~7.0豎置2.0~5.0排煙煙道內(nèi)2.0~3.0煙筒內(nèi)4.0~7.0(2)壓縮機(jī)進(jìn)口管線0.1220.0~45.0排出管線

4、0.2310.0~25.0(3)塔器周邊管線>2.5kg/cm2G0.046~0.127.0~20.00.0~2.5kg/cm2G0.046~0.1210.0~30.0真空0.012~0.02310.0~30.0三、水類別最大允許壓降流速kg/cm2/100mm/s(1)一般0.400.6~4.9口徑(mm)250.6~0.9500.9~1.41001.5~2.11502.1~2.72002.4~3.02503.0~3.73003.0~4.34003.0~4.6>5003.0~4.9(2)泵吸入口0.1

5、00.5~1.5(3)泵排出口0.401.0~3.0離心泵2.0~3.0往復(fù)泵1.0~2.0(4)鍋爐給水0.401.5~3.0(5)冷卻水0.401.0~2.5四、蒸汽類別最大允許壓降流速kg/cm2/100mm/s(1)一般壓力等級(jí)0.0~3.5kg/cm2G0.0610.0~35.03.5~10.5kg/cm2G0.1210.0~35.010.5~21.0kg/cm2G0.2310.0~35.0>21.0kg/cm2G0.3510.0~35.0(2)過(guò)熱蒸汽口徑(mm)>2000.3540.0~6

6、0.0100~2000.3530.0~50.0<1000.3530.0~40.0(3)飽和蒸汽口徑(mm)>2000.2030.0~40.0100~2000.2025.0~35.0<1000.2015.0~30.0(4)乏汽排汽管(從受壓容器中排出)80.0排汽管(從無(wú)壓容器中排出)15.0~30.0排汽管(從安全閥排出)200.0~400.0