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CHEMICAL ENGINEERING
Table 5.4.
Line calculation form (Example 5.4)
Pump and line calculation sheet
Job no. Sheet no. By RKS, 7/7/79 Checked
4415A 1
Fluid ODCB DISCHARGE CALCULATION
Temperature °C 20 Line size mm 40
Density kg/m 3 1306 Flow Norm. Max. Units
Viscosity mNs/m 2 0.9 u 2 Velocity 1.7 2.0 m/s
Normal flow kg/s 2.78 f 2 Friction loss 1.0 1.5 kPa/m
Design max. flow kg/s 3.34 L 2 Line length 54 m
Line loss 54 kPa
f 2 L 2
SUCTION CALCULATION Orifice 15 22 kPa
Line size mm 40 30% Control valve 140 200 kPa
Flow Norm. Max. Units Equipment
u 1 Velocity 1.7 2.0 m/s (a) Heat ex. 70 100 kPa
Friction loss 1.0 1.5 kPa/m (b) kPa
f 1
L 1 Line length 3.4 m (c) kPa
Line loss 3.4 5.1 kPa (6) Dynamic loss 279 403 kPa
f 1 L 1
2
u /2 Entrance 1.9 2.7 kPa
1
(40 kPa) Strainer kPa z 2 Static head 6.5 m
(1) Sub-total 5.3 7.8 kPa gz 2 85 85 kPa
Equip. press (max) 200 200 kPa
z 1 Static head 1.5 1.5 m Contingency None None kPa
gz 1 19.6 19.6 kPa (7) Sub-total 285 285 kPa
Equip. press 100 100 kPa (7) C (6) Discharge press. 564 685 kPa
(2) Sub-total 119.6 119.6 kPa (3) Suction press. 114.3 111.8 kPa
(8) Diff. press. 450 576 kPa
(2) (1) (3) Suction press 114.3 111.8 kPa
(8)/ g 34 44 m
(4) VAP. PRESS. 0.1 0.1 kPa
(3) (4) (5) NPSH 114.2 111.7 kPa Control valve
Valve/(6)
(5)/ g 8.7 8.6 m % Dyn. loss 50%
C 201
1 bar
C 203
2 bar

H 205
2.5 m 1.0 m 7.5 m

Z = 2.5 − 1 = 1.5 m
1
Z = 7.5 − 1 = 6.5 m
2