Process Equipment and Plant Design
In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

Fixing the tubes
Reducing scale deposition
Creating turbulence
Increasing pressure drop

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.

Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm²
Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hen
Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm²
Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

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Process Equipment and Plant Design
Seamless pipe is made

By forging a solid round, piercing it by simultaneously rotating & forcing it over a piercer point and further reducing it by rolling gas drawing
From rolled strips formed into cylinders and seam-welded
By extrusion & casting into static and centrifugal molds
Both B and C

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