In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement

• A. results in higher shell side pressure drop.
• B. can accomodate less number of tubes for a given shell diameter.
• C. facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell side fluid.
• D. creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer co-efficient.