Page 276 - Chemical process engineering design and economics

Compressors, Pumps, and Turbines 255

Table 5.14 Rules-of-Thumb for Locating Process Equipment

Process Equipment Location Above
0
Ground Level , ft

Pumps 0
Condensers 20
Reflux Drums 10
Phase Separators 3 to 5
3
Skirt Height for Columns" 3 to 6
(2 to 12 ft in diameter)
Heat Exchangers 1 to 4

a) A "skirt" supports the column. The skirt
diameter equals the column diameter.
b) Source: Reference 57
c) To convert to meters multiply by 0.3048.

Table 5.15 Approximate Frictional Pressure Drop Across Process Equip-
ment

0
Flow System Component Pressure Drop , bar Reference

Pipeline 0.35 5.50
Control Valve 0.70 5.46
Interchanger 0.35 a 5.55
Air Cooler 0.60 5.23
Surge Vessel Small

a) Pressure drop for a fluid with a viscosity less than 1 cp
(0.001 Pa-s)
b) To convert to psi multply by 14.5.

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