7/17/2019 102

http://slidepdf.com/reader/full/102563db9ba550346aa9a9f59ec 1/1

  Basic Engineering Design Basis Part-B

of AISHWARYA Project

at Haldia Refinery, IOCL

DOCUMENT No.

A609-00-02-41-ODB-0001

Rev C

Page 55 of 75

Template No. 5-0000-0001-T2 Rev. 1 Copyrights EIL  – All rights reserved

if connected to closed system: ■ yes no

■PSV in IBR steam service shall have installed spare.   ■ yes 

9.9 Control philosophy for vendor package items

9.9.1 For all vendor package supplies, mode of monitoring, control and logics shall be decided

during detailed engineering Pneumatic based control system for any package shall not be

specified. Instead PLC based system shall be specified.  

9.10 Standard Instrumentation:

9.10.1  Packed towers:

(Owner to indicate the preferences)

Local differential pressure indication for each bed: yes ■ no

Local differential pressure indication for total section: yes ■ noControl Room differential pressure indication for each bed: ■ yes no

Control Room differential pressure indication for critical beds: yes ■ no

Control Room differential pressure indication for total section: ■ yes no

 1+1 Basket strainers in lines going to packed beds: ■ yes  no

  Single basket strainers in lines going to packed beds: ■ yes  no

9.10.2  Heat Exchangers:

(Owner to indicate the preferences)

Isolation valves at both inlet & outlet in cooling water service: ■ yes no

Isolation valves at only inlet in cooling water service: yes ■ no

Isolation and bypass valves for process side of all exchangers: yes ■ noIsolation and bypass valves for only exchangers which can

 be taken out for maintenance when plant is running: ■ yes no

Thermowell at process inlet and outlet of each exchanger : ■ yes no

Local TI at cooling water outlet of each exchanger: ■ yes no

Local TI at process inlet and outlet of each service: yes ■ no

Control Room TI at process inlet and outlet of each service: ■ yes no

Control room PI across exchanger train ■ yes no 

PG across each exchanger at inlet /outlet ■ yes no 

9.10.3 Utility lines: As a minimum, the following shall be provided in unit utility headers:Table-9.1: Instrumentation for Utility Headers at Unit B/L

UTILITY local

PI

DCS

PI

PAL/

PAH

local

TI

DCS

TI

TAL/

TAH

DCS

FI

FAL/

FAH

DCS

FQ

HP STEAM y y y y y y y y y

MP

STEAM

y y y y y y y y y

LP STEAM y  y  y  y  y  y 

Condensate y 

y 

y 

y 

y 

y 

CW supply y  y  y  y  y  y  y  y 

CW return y  y  y  y  y  y  y 

Instrument y 

y 

y 

y 

y 

y 

Page 102 of 10496