Process Equipment and Plant Design
LMTD correction factor is used in heat exchanger design for

Double pipe heat exchanger
Multipass shell and tube heat exchanger
Counter flow of hot and cold fluids
Fouling fluids

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Process Equipment and Plant Design
Seamless pipe is made

By extrusion & casting into static and centrifugal molds
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

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