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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ liquor is best handled in a long tube vertical evaporator.

Salting
Viscous
Scaling
Foamy

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Process Equipment and Plant Design
Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

16
38
28
19

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Process Equipment and Plant Design
The minimum shell thickness for tank ≤ 15 metres diameter is limited to __________ mm, for reasons of elastic stability.

15
5
10
2

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Process Equipment and Plant Design
The normal range of velocity of steam in pipes is __________ m/sec.

0.1-0.5
80-100
10-20
1-5

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Process Equipment and Plant Design
Needle valves are generally not used for

High pressure throttling service
Smaller sizes of pipe
Very accurate flow control
Very large diameter pipes

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to

∞
1
20.8
2

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