Pressure loss calculations for pipe, duct and T-piecesExample

Water velocity in pipe, m/s

Flow, m3/hPipe diameter, mm

25 30 35 40 45 50 55 651 0.6 0.4 0.3 0.2 0.2 0.1 0.1 0.12 1.1 0.8 0.6 0.4 0.3 0.3 0.2 0.2

5.7 3.2 2.2 1.6 1.3 1.0 0.8 0.7 0.58 4.5 3.1 2.3 1.8 1.4 1.1 0.9 0.7

15 8.5 5.9 4.3 3.3 2.6 2.1 1.8 1.320 11.3 7.9 5.8 4.4 3.5 2.8 2.3 1.725 14.2 9.8 7.2 5.5 4.4 3.5 2.9 2.130 17.0 11.8 8.7 6.6 5.2 4.2 3.5 2.5

35 19.8 13.8 10.1 7.7 6.1 5.0 4.1 2.940 22.6 15.7 11.6 8.8 7.0 5.7 4.7 3.445 25.5 17.7 13.0 10.0 7.9 6.4 5.3 3.850 28.3 19.7 14.4 11.1 8.7 7.1 5.8 4.255 31.1 21.6 15.9 12.2 9.6 7.8 6.4 4.6

60 34.0 23.6 17.3 13.3 10.5 8.5 7.0 5.065 36.8 25.6 18.8 14.4 11.4 9.2 7.6 5.470 39.6 27.5 20.2 15.5 12.2 9.9 8.2 5.975 42.5 29.5 21.7 16.6 13.1 10.6 8.8 6.380 45.3 31.5 23.1 17.7 14.0 11.3 9.4 6.785 48.1 33.4 24.6 18.8 14.9 12.0 9.9 7.190 51.0 35.4 26.0 19.9 15.7 12.7 10.5 7.595 53.8 37.4 27.4 21.0 16.6 13.4 11.1 8.0

100 56.6 39.3 28.9 22.1 17.5 14.2 11.7 8.4

Pressure loss calculations for pipe, duct and T-pieces

Singular loss coefficient of 90degrees bends 1 *v2/(2*9,81)Number of bends 20Singular loss coefficient of the T-piece 2 *v2/(2*9,81)Number of T 2Singular loss coefficient suction 1 *v2/(2*9,81)Number of suction + discharge 1Pressure loss coefficient (f) pipe DN80 smooth tube 0.02 *((l/D)*v2)/(2*9,81)Number of meter tubes 100 mPipe diameters DN80 0.065 m

2.9 m/s

Pressure drop in pipes / pump design 22.02 m

Static Lift height, pressure side 3 mInlet pressure, suction side 1.5 m

Design pressure pump 23.5 m

D*v 0Re v/ 50 m3/h ### =>f 0

8 353.6 60

28.8 2100

Speed in tubes at 80 m3 / h DN100

Retrieved from the table

Pipe dia. In mm 135.70

Flow ,m3/h 50.00

velocity, v in m/s 0.96Pipe length in mt. 5.10

Singular loss coefficient in 90degrees bend 0.3Number of bends 0Singular loss coefficient T piece 0.2Number of T 0Singular loss Coefficient suction 1Number suction 1Singular loss Coefficient discharge 0.50Number discharge 1.0Pressure loss coefficient (f) pipe smooth pipes 0.02Number of meters of piping 5.1 mDiameter, Pipe 0.1357 m

0.961 m/s

Pressure loss in pipe / pump design 0.153 m

Static Head, pressure side mInlet pressure, suction side m

Design pump pressure 0.153 m

Velocity the tubes