Oct - Dec 2009 • Vol. No. 32 Issue No. 2 • - L&T Construction

ECC Concord Oct-Dec 09 48
Instrumentation
Control and Automation plays a crucial role in the
safe operation of Jamnagar Refinery which is virtually
unmanned. This is achieved by the massive
instrumentation works that involve the latest
technology available.
E & I played a crucial role in executing the critical
instrumentation job in the priority areas of one unit of
CRUDE-311, and one unit of DHDS-01 and in the
non-priority areas which later on turned into a priority
area like FCCU, CRUDE-312, ALKALISATION, CFP
(DHDS-02, LCO).
The scope of instrumentation work involved
installation of 4798 junction boxes, 260
instrument panels, 633 t structural steel inclusive
Night view of the Project site at Jamnagar
Achievements
A centralised calibration laboratory with the latest
calibration instruments of very high accuracy was set
up, which was considered the Model Facility for other
instrumentation contractors.
In order to meet the high speed of execution the
instrument tray routes were finalised based on the 3-
D modelling of the units. State-of-the-art Swagelok
tube benders were imported for giving flawless bends
in impulse tubing works.
JB frames were mounted on either dummy wooden
sleepers or angle supports taking into consideration
the civil elevation before paving. This was
advantageous in frame erection much before
paving.
of fabrication, 221 km GI perforated cable tray, A latest technology called ‘Foundation Field’ (FF)
2311 km of instrument cable, 11089 instrument
bus was adapted at JERP. It is an all-digital bicalibration,
10646 instrument installation, 125
directional communication between sensors and
km impulse tubing, 17 km GI piping and 10398
the control valves. Special training was given to the
loop checking.
instrument electricians involved in FF cable laying
Similar to the electrical works, the instrumentation
and termination works.
was also done with 24 staff members of whom 22 On the whole, the quality of work was very much
were new. Intensive training was provided to the team
appreciated by the spur JB vendor, even
members for enabling them to understand the
though it was L&T’s maiden venture with the FF
systems and to maintain documents.
technology.
Cable ties of different sizes were used for cable
dressing and copper tubing instead of GI wires to
avoid damage to insulation. All impulse lines were
hydro-tested and proper records were maintained to
avoid leakage of hydro - carbon during
commissioning.
Team L&T is proud to be the driving force behind the
installation of such path breaking technology which
is considered as one of the technological wonders
of the world.
A.K.Mitra
Deputy General Manager