The shell and nozzle of a 1-2 shell and tube heat exchanger is designed (1-shell pass; 2-tube passes) is to be fabricated. 52 tubes of 16 mm Outside diameter are arranged in square pitch 20mm. Data given for shell is design pressure=0.5N/mm2; Nozzle diameter=90mm; permissible stress=100N/mm?; joint efficiency=85%. Estimate the actual values in mm of (i) Inside diameter of shell (il) thickness of shell and (fI) Nozzle thickness. Neglect corrosion allowance and take proportionality factor, =0.7. Use estimated shell thickness only for other thickness calculations.