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. 48 tubes of 18 mm Outside diameter are arranged in square pitch 20mm. Data given for shell is design pressure =0.55N/mm; ; Nozzle diameter 100mm; permissible stress =100N/mm2; joint efficiency =85%. Estimate the actual values in mm of (i) Inside diameter of shell (ii) thickness of shell and (iii) Nozzle thickness. Neglect corrosion allowance and take proportionality factor, =0.7. Use estimated shell thickness only for other thickness calculations