(7)冷却管线0.090.6~1.2
(8)塔器供液管线0.141.2~1.8
二、气体工艺介质
类别最大允许压降流速
kg/cm2/100mm/s
(1)一般
压力等级
>35.0kg/cm2G0.467.0~20.0
14.0~35.0kg/cm2G0.357.0~20.0
10.5~14.0kg/cm2G0.147.0~20.0
管道尺寸选择原则
一、液体工艺介质
类别最大允许压降流速
kg/cm2/100mm/s
(1)一般0.921.5~4.6
液体密度<1600kg/cm21.5~2.4
液体密度<800kg/cm21.8~3.0
液体密度<320kg/cm23.0~4.6
粘度(cp)管径(mm)0.1~0.5
1.0250.5~1.1
3.5~10.5kg/cm2G0.0710.0~30.0
0.0~3.5kg/cm2G0.0310.0~30.0
真空0.0210.0~30.0
换气用风道
横置4.0~7.0
竖置2.0~5.0
排烟
烟道内2.0~3.0
烟筒内4.0~7.0
(2)压缩机
进口管线0.1220.0~45.0
排出管线0.2310.0~25.0
(2)过热蒸汽
口ቤተ መጻሕፍቲ ባይዱ(mm)
>2000.3540.0~60.0
100~2000.3530.0~50.0
<1000.3530.0~40.0
(3)饱和蒸汽
口径(mm)
>2000.2030.0~40.0
100~2000.2025.0~35.0
<1000.2015.0~30.0
(4)乏汽
排汽管(从受压容器中排出)80.0
(3)塔器周边管线
>2.5kg/cm2G0.046~0.127.0~20.0
0.0~2.5kg/cm2G0.046~0.1210.0~30.0
真空0.012~0.02310.0~30.0
三、水
类别最大允许压降流速
kg/cm2/100mm/s
(1)一般0.400.6~4.9
口径(mm)
250.6~0.9
500.9~1.4
1001.5~2.1
1502.1~2.7
2002.4~3.0
2503.0~3.7
3003.0~4.3
4003.0~4.6
>5003.0~4.9
(2)泵吸入口0.100.5~1.5
(3)泵排出口0.401.0~3.0
离心泵2.0~3.0
往复泵1.0~2.0
(4)锅炉给水0.401.5~3.0
500.7~1.5
1001.0~2.0
50.0250.5~0.9
500.7~1.0
1001.0~1.6
100.0250.3~0.6
500.5~0.7
1000.7~1.0
2001.2~1.6
1000.0250.1~0.2
500.16~0.25
1000.25~0.35
2000.35~0.55
(2)泵吸入口
饱和液体0.120.6~1.8
过冷液体0.231.2~2.4
(3)泵排出口
0～60m3/h1.381.8~2.4
60～160m3/h0.922.4~3.0
>160m3/h0.463.0~4.6
(4)容器、塔器底部排出管线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
(5)冷却水0.401.0~2.5
四、蒸汽
类别最大允许压降流速
kg/cm2/100mm/s
(1)一般
压力等级
0.0~3.5kg/cm2G0.0610.0~35.0
3.5~10.5kg/cm2G0.1210.0~35.0
10.5~21.0kg/cm2G0.2310.0~35.0
>21.0kg/cm2G0.3510.0~35.0
排汽管(从无压容器中排出)15.0~30.0
排汽管(从安全阀排出)200.0~400.0