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 D in N	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 Dn (in)	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