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Process Equipment and Plant Design

Process Equipment and Plant Design
for couplings and unions would be

Negligible
200
60
350

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Process Equipment and Plant Design
Welded joint efficiency in the design of chemical process equipment is taken as

0.85
0.75
0.95
0.55

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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.

19
38
28
16

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Process Equipment and Plant Design
A pressure vessel is said to be made of 'thick' shell, if the ratio of its diameter to wall thickness is

20
10
10
20

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Process Equipment and Plant Design
__________ dished head is the strongest of all.

Torispherical
Hemispherical
None of these
Elliptical

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Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 7.6 Q0.36 . ρ0.9
Di, opt = 3.9 Q0.45 . ρ0.23
Di, opt = 3 Q0.36 ρ0.18
Di, opt = 3 Q0.36 . ρ1.86 μ0.08

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