Dear Amit, 
Pl confirm- 
1. to provide Nozzle N6D of 50NB ( for Cooling Water Outlet from 4th Zone), 
2.Nozzles below 40NB with stiffners, 
3. Nozzles above 80NB with Pad Plate
4. Dowelling arrangement for quick fixing and alignment of flange joints.
After you ensure these suggestion, you can go ahead with finalization of drawing. Best Rgds,,, Sandeep Naidu