From - Mr.M. S. Nimbalkar.

Our comments on the nozzle sizes are as follows :-

1)	Please refer 0.5 sq.m. ATFE for toluene – MLR case.  Since we have standardized the nozzle size of ATFE, it will not be possible to change the feed, vapour and product nozzles of this ATFE.  So we would like to keep the nozzle sizes as indicated in our G.A. drawing.  

Nozzle (N1) vapour out – 100 NB
Nozzle (N2) feed in – 15 NB
Nozzle (N11) product out – 40 NB
   
2)	Refer item no.41 (Condenser for ATFE for toluene – MLR case).  You have changed the cooling water inlet & outlet sizes from 15 to 25 NB.  With larger nozzle size, the cooling water flow going inside the tubes will also be more considering 2 m/sec. velocity in the pipe line. With this much flow rate, the pressure drop on the tube side is going more than 1 bar which is not a standard practice.  Hence we request you to keep the cooling water inlet & outlet nozzle size as 15 NB.
  
3)	Refer item no.29 (Condenser for RFE for toluene – product mixture case).  You have changed the cooling water inlet & outlet sizes from 25 to 40 NB similar to item no.41.  Considering the same basis as item no.41, here also the pressure drop on the tube side is going more than 1 bar because of larger cooling water inlet & outlet sizes. Hence here also we request you to keep the nozzle size as 25 NB.
