Basic Engineering Design Basis Part-B

of AISHWARYA Project

at Haldia Refinery, IOCL

DOCUMENT No.

A609-00-02-41-ODB-0001

Rev C

Page 54 of 75

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

■ All SOV’s will be control room manual reset except heater

related SOV’s which will be field manual reset. ■ yes

However, licensor recommendation if any, shall be incorporated.

9.6 Status indication lamps in control room: (HW console)

■ All continuously running rotating equipment: yes ■ no

■ Critical continuously running rotating equipment: ■ yes no

■ Alarm window in control room for all compressors. ■ yes no

■ Hardwired alarm annunciation in control room

for critical compressors.. ■ yes

It is desired that all rotating equipment should have running information on DCS. The

critical equipment should necessarily have running indication on DCS. Compressor alarms

should also be repeated in main control room. Compressor trip alarms should be hard wired.

9.7 Control valve manifold:

9.7.1 As a default, all control valves in steam service and control valves upto 8" size in other

services and shall be provided with a manifold of block and bypass valves. Bypass valves

shall be globe valves. Control valves not having block and bypass provision shall be

provided with hand wheel for manual operation. For control valve above 8" size other than

steam service, block and bypass requirement shall be decided on case to case basis.

If owner has any specific additional or different preferences, indicate:

9.7.2 All control valves shall be provided with 3/4" drain valves, which can be provided as:

and downstream of all control valves

upstream and downstream of fail close valves, upstream of fail open valves

■ upstream and downstream of fail close valves, downstream of fail open valves

upstream of all control valves

■ drain valve shall be capped (in non-hydrocarbon and non IBR LP steam service)

■ drain valve shall be blind-flanged (in all Hydrocarbon and IBR steam service)

9.7.3 In no event shall shutdown valves be provided with block / bypass valves.

No bypass valves, but case to case basis u/s & d/s block valves are required.

9.8 Pressure relief valves (PSV):

9.8.1 Owner to indicate preferences towards pressure relief valves:

■ PSV for operational failures shall have installed spare: ■ yes no

(25% spare to be provided for multiple PSV’s.)

■ PSV exclusively for non-operational failures (external fire or

heat exchanger tube rupture) shall not have installed spare: ■ yes no

■ Spared PSV shall have upstream and downstream isolation: ■ yes no

■ Spared PSV shall have only upstream isolation: yes ■ no

■Unspared PSV shall have upstream and downstream isolation: ■ yes no

■ Unspared PSV shall have only upstream isolation: yes ■ no

■ Unspared PSV shall have no isolation: yes ■ no

■ PSV in IBR steam service shall have no isolation: ■ yes no

■ PSV in air service shall have only upstream isolation: ■ yes no

■PSV for thermal relief valve shall not have installed spare: ■ yes no

■PSV on spare equipment shall have downstream isolation only

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