各種管接頭相當於直管公尺數之壓力損失(M)

各種管接頭相當於直管公尺數之壓力損失(M)

Pressure Loss of Pipe Joints Equivalent to Straight Pipe in Meters(M)

公稱管徑
DNin
實際內徑
in
閘門閥
( 全開 )
45°彎頭 長彎頭或直行三通 標準彎頭或半縮直行三通 標準轉向三通 回取彎頭
Nominal caliber DNin Actual bore (in) Gate valve (fully open) 45° elbow Long bend or straight three-way Standard elbow or semi-flexible straight three-way Standard turnaround three-way Back curve elbow
阻抗係數
Impeding factor
0.19 0.42 0.6 0.9 1.8 2.2
1/2 0.622 0.11 0.24 0.34 0.52 1 1.2
3/4 0.824 0.13 0.3 0.43 0.64 1.3 1.6
1 1.049 0.17 0.37 0.55 0.8 1.6 2
1 1/4 1.380 0.23 0.49 0.7 1.1 2.1 2.6
1 1/2 1.610 0.26 0.58 0.8 1.2 2.5 3
2 2.067 0.34 0.73 1.1 1.6 3.2 3.9
1 1/2 2.469 0.4 0.88 1.3 1.9 3.8 4.6
3 3.063 0.49 1.1 1.6 2.3 4.7 5.8
4 4.026 0.64 1.4 2.1 3.1 6.2 7.6
5 5.047 0.82 1.8 2.6 3.9 7.7 9.4
6 6.065 0.98 2.2 3.1 4.7 9.4 11
7 7.024 1.1 2.5 3.6 5.4 10.6 13
8 7.981 1.3 2.9 4.1 6.2 12 15
10 10.020 1.6 3.6 4.2 7.7 15.5 19
止回閥
(擺線形)
全開
直角閥
全開
停止閥
( 全開 )
焊接式標準彎頭
Weld type standard elbow
90° 45°
Check valve (cycloid type) (fully open) Right angle valve (fully open) Stop valve (fully open) 短曲形 Short
curve type R/DN= 1
長曲形 Long curve type R/DN= 1.5 短曲形 Short
curve type R/DN= 1
長曲形 Long curve type R/DN= 1.5
2.3 5.0 10.0 1 1.5 1 1.5
1.3 2.8 5.6 - 0.2 - 0.13
1.6 3.5 7 - 0.3 - 0.17
2 4.5 9 0.49 0.35 0.3 0.2
2.7 5.9 11.7 0.64 0.46 0.4 0.3
3.2 7 13.8 0.73 0.55 0.49 0.35
4 8.8 17.7 0.94 0.7 0.6 0.45
4.8 10.6 21 1.1 0.8 0.7 0.5
6 13 26 1.4 1 0.9 0.67
8 17 34 1.9 1.3 1.2 0.88
10 21 43 2.3 1.7 1.5 1.1
12 26 52 2.8 2 1.8 1.3
13.7 30 60 - - - -
16 34 68 3.7 2.7 2.3 1.7
20 43 85.6 4.6 3.4 3 2.2
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