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Process Equipment and Plant Design

Process Equipment and Plant Design
Friction factor for turbulent flow in a new pipe is given by

f = 0.04/NRe0.16
f = 0.22 NRe0.05
f = 25/NRe
f = 16/NRe

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Process Equipment and Plant Design
The necessary wall thickness for a metallic storage vessel is a function of the

Ultimate tensile strength (or yield point) of the material and operating temperature
Operating pressure and welding/joint efficiency
All of these
Diameter of the vessel

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Process Equipment and Plant Design
In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the

Lower static submergence
Liquid gradient on the tray
Lower skirt clearance
Small downcomer liquid seal

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Process Equipment and Plant Design
The most common standard size of bubble caps used in industrial operation is

6" dia cap with 4" dia riser
8" dia cap with 1" dia riser
1" dia cap with 0.5" dia riser
4" dia cap with 8" dia riser

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Process Equipment and Plant Design
Maximum allowable vapour velocity in a bubble cap tower is determined by the

Entrainment considerations
None of these
Diameter of the column
Vapour density

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Process Equipment and Plant Design
Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

45°
60°
30°
75°

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