Page 247 - Chemical engineering design

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PIPING AND INSTRUMENTATION
Optimum diameter D 260 7000 0.52 7.72 0.37 5.15
3600
D 172.4mm
use 180-mm pipe.
Viscosity of HCl 0.013 m Ns/m 2

4 7000 1
6
Re D ð ð D 1.06 ð 10 , turbulent
3600 0.013 ð 10 3 ð 180 ð 10 3
Comparison of methods:

Economic diameter
Equation 5.15 180 mm
Peters and Timmerhaus (1991) 9 in. (220 mm) carbon steel
Nolte (1978) 7 in. (180 mm) carbon steel

Example 5.8
Calculate the line size and specify the pump required for the line shown in Figure 5.15;
Ž
material ortho-dichlorobenzene (ODCB), flow-rate 10,000 kg/h, temperature 20 C, pipe
material carbon steel.

2 m

20 m
7.5 m

5 m 6.5 m
5.5 m

Datum

2.5 m 0.5 m 1m Preliminary layout
not to scale
0.5
1.0 m 4 m
Datum

Figure 5.15. Piping isometric drawing (Example 5.8)