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  • 文件名称: 管道尺寸选择原则
  • 更新时间: 2012-08-20 21:28:53
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简介:

管道尺寸选择原则

一、    液体工艺介质

        类别                       ****允许压降        流速

                                   kg/cm2/100m                  m/s

(1)       一般                                   0.92                        1.5~4.6

    液体密度<1600kg/cm2                                                                1.5~2.4

       液体密度<800kg/cm2                                                                  1.8~3.0

       液体密度<320kg/cm2                                                                  3.0~4.6

    粘度(cp)               管径(mm)                 0.1~0.5

       1.0                        25                                                                    0.5~1.1

                                    50                                                                    0.7~1.5

                                    100                                                                  1.0~2.0

       50.0                      25                                                                    0.5~0.9

                                    50                                                                    0.7~1.0

                                    100                                                                  1.0~1.6

       100.0                    25                                                                    0.3~0.6

                                    50                                                                    0.5~0.7

                                    100                                                                  0.7~1.0

                                    200                                                                  1.2~1.6

       1000.0                  25                                                                    0.1~0.2

                                    50                                                                    0.16~0.25

                                    100                                                                  0.25~0.35

                                    200                                                                  0.35~0.55

(2)       泵吸入口

    饱和液体                       0.12                                0.6~1.8

       过冷液体                       0.23                                1.2~2.4

(3)       泵排出口

    060m3/h                                             1.38                                1.8~2.4

       60160m3/h                                         0.92                                2.4~3.0

       >160m3/h                                              0.46                                3.0~4.6

(4)   容器、塔器底部排出管线             0.14                           1.2~1.8

(5)   再沸器入口                            0.03                           0.3~1.2

(6) 冷凝器出口                                0.11                           0.9~1.8

(7)   冷却管线                       0.09                           0.6~1.2

(8)   塔器供液管线                   0.14                           1.2~1.8

       

 

二、    气体工艺介质

    类别                           ****允许压降        流速

                                                              kg/cm2/100m                  m/s

(1)       一般

    压力等级

    >35.0                 kg/cm2G                      0.46                                7.0~20.0

    14.0~35.0          kg/cm2G                      0.35                                7.0~20.0

    10.5~14.0          kg/cm2G                      0.14                                7.0~20.0

    3.5~10.5            kg/cm2G                      0.07                                10.0~30.0

    0.0~3.5              kg/cm2G                      0.03                                10.0~30.0

    真空                           0.02                                10.0~30.0

    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                       0.12                                20.0~45.0

    排出管线                       0.23                                10.0~25.0

(3)       塔器周边管线

    >2.5 kg/cm2G                                        0.046~0.12                     7.0~20.0

    0.0~2.5              kg/cm2G                      0.046~0.12                     10.0~30.0

    真空                           0.012~0.023                   10.0~30.0

 


 

 

三、   

    类别                           ****允许压降        流速

        kg/cm2/100m                                 m/s

(1)       一般                       0.40                    0.6~4.9

    口径(mm)

    25                                                                                                 0.6~0.9

    50                                                                                                 0.9~1.4

    100                                                                                               1.5~2.1

    150                                                                                               2.1~2.7

    200                                                                                               2.4~3.0

    250                                                                                               3.0~3.7

    300                                                                                               3.0~4.3

    400                                                                                               3.0~4.6

    >500                                                                                             3.0~4.9

(2)       泵吸入口                  0.10                  0.5~1.5

(3)       泵排出口                             0.40                       1.0~3.0

        离心泵                                         2.0~3.0

        往复泵                                         1.0~2.0

(4)       锅炉给水                  0.40                      1.5~3.0

(5)       冷却水                              0.40                  1.0~2.5


 

 

四、    蒸汽

    类别                           ****允许压降        流速

        kg/cm2/100m                                 m/s

(1)       一般  

        压力等级

    0.0~3.5              kg/cm2G                      0.06                                10.0~35.0

    3.5~10.5            kg/cm2G                      0.12                                10.0~35.0

    10.5~21.0          kg/cm2G                      0.23                                10.0~35.0

    >21.0                 kg/cm2G                      0.35                                10.0~35.0

(2)       过热蒸汽

    口径(mm)

    >200                           0.35                                40.0~60.0

    100~200                        0.35                                30.0~50.0

    <100                                                      0.35                                30.0~40.0

(3)       饱和蒸汽

    口径(mm)

    >200                           0.20                30.0~40.0

    100~200                        0.20                25.0~35.0

    <100                                                      0.20                15.0~30.0

(4)       乏汽

        排汽管(从受压容器中排出)                       80.0

               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