Reference table for the pipeline loss

Reference table for the pipeline loss

Pipe diameter (mm)	Capacity(L/s)
	1	2	4	6	8	10
25	3.27	13.0
40	3.5	14	15				15	20	Brief table for the frictional loss of a straight pipe (for evaluation) the lost meters of a 100m straight
50	0.8	3.1	13	29					25	30	pipe takes the newly cast iron pipe as the standard and multiple for the old one.
65		0.8	3.2	7.1	13	20					40	50
80		0.4	1.6	3.3	5.9	9.6	21.6						60	70
100			0.4	0.8	1.3	2.1	6.8	8.6	13	19.4					80	90
125				0.23	0.4	0.63	1.3	2.7	4.1	5.9	10.7						100	110
150					0.16	0.26	0.58	1.1	1.6	2.3	4.2	6.4	9.4						120	130
175						0.11	0.27	0.5	0.74	1.05	1.9	2.9	4.3	5.8	7.7	9.6					140	160
200							0.13	0.26	0.37	0.53	0.93	1.5	2.1	2.9	3.7	4.7	6.1	7.2	8.5				180	200
250								0.07	0.12	0.18	0.30	0.48	0.68	0.93	1.2	1.5	1.9	2.3	2.8	3.3	3.7	4.9	6.2
300										0.07	0.12	0.19	0.27	0.37	0.49	0.61	0.76	0.9	1.1	1.3	1.5	2.0	2.4	3.0

The length of a straight pipe converted into from both valve and elbow (each)

Variety	Convert into the times of the diameter of a straight pipe	Note
Full opened gate valve	15	Multiple in case of un open
Standard elbow	25
Back valve	100
Foot valve	100	Partial block-up multiplied

Note: For instance, a 100mm diameter pipe, the foot valve has a 100 100=10000mm=10m diameter when which is Max. Capacity limit for a certain pipeline diameter converted into 100 times that of the pipe's diameter. Suppose the flow is 8L/s, looked into the above table, the   loss of the straight pipe is 1.3m each 100m, then the one for 100mm is 0.13m, that is, for a 100mm foot valve with a flow 8L/s, its head low is 0.13m.  

Limit of the maximum flow for a pipe with a certain diameter

Pipeline diameter (mm)	Max. Capacity (L/s)	Max. flow velocity (m/s)	Pipeline diameter (mm)	Max. Capacity (L/s)	Max. flow velocity (m/s)
25	1	2.04	125	30.0	2.44
40	2.5	2.20	150	43.0	2.45
50	4.17	2.12	175	60.0	2.49
65	6.67	2.01	200	83.3	2.69
80	10.0	2.26	250	133.3	2.72
100	18.4	2.33	300	192.0	2.72

Note: The pipeline loss would be made greatly increased once the limit is over.