Please find below the gaps/requirements identified in P & I drawing No: TFS-10-127-P& ID, Rev: 0 and dt: 03.12.10

Instrumentation:

1. Temperature transmitter a were not shown in PID for i) Pre heater -1 inlet of MEE , ii) Steam inlet line at main header and iii) ATFD vapour temperature.
2. Steam control valve can not be common for MEE & ATFD. Interlocking requirement through PLC would differ from MEE to ATFD. Hence consider independent control valves for MEE & ATFD and show the same in PID  
3. Absolute pressure transmitter (vacuum) for all vapour separators. This was agreed by Technoforce vide e.mail given by Gaurav on 21.09.10. Incorporate the same in PID.
4. All instruments impulse SS piping is vendor scope.
5. Transmitter and steam flow meters should be Rosemount make.

PLC: 
Please consider Make:Telemec ( PLC programming software -Premium version)  and Scada: Vijeo citec ( configuration software).
We require :Trends (flow, pressure, temperature),Alarms,  pumps status ( ON/OFF), Report logging: Temperature, flow & totalizers ( steam, feed, condensate & concentrate , Pressure, level and vacuum) etc.,

Mechanical:

1. Demister pads provided above SS mesh in vapour separators is giving problem in the long run. SS mesh eaten away due to corrosion of CIP solution and small pieces are carried into pumps.  Suitable plate with pores to be explored in the design point of view. 
2. Stainers should be provided for all pumps. Incorporate in all places of PID.
3. CIP system and pumps cooling system : Refer to discussion had with Manasi & Satish on 30.12.2010. Incorporate the scheme in the PID(TFS-10-127-P& ID, Rev: 0) sent by us on 15.11.2010. However one change may be noted. CIP solution entry for shell side should be at bottom and exit at top of FCE. 
4. Drain points for the system should be at least 3" Dia ( exactly below vertical pipe line). Discussed and agreed by Technoforce (Refer MoM dtd 03.09.10). Whereas the same shown as 15 NB. Correct them. 
5. Stand by pumps for CIP & Seal cooling system not shown in PID.

Concerns:

1. Flow switches of MEE axial flow pump seal cooling system and High current switches are not working since commissioning onwards. Please look at this aspect and select right type of instruments for trouble-free operation. 

Please make the above corrections and arrange the revised PID for our review. 