Process Equipment and Plant Design
Seamless pipe is made

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

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Process Equipment and Plant Design
High pressure fluid in a shell and tube heat exchanger should preferably be routed through the

Tubes to avoid the expansion of high pressure shell construction
Shell side, if the flow is counter-current and tube side if the flow is co-current
Shell side for smaller total pressure drop
Shell side for large overall heat transfer co-efficient

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