Page 25 - Impiantistica Italiana

tions for cooling water, light gasoil
and slurry
• New gasoil blender unit
• New analyzers house
• Extensive revamp by addition of new
pipe-racks and interconnecting pi-
ping in offsite
• Extensive revamp of electrical and in-
strumentation networks
• Relocation of steam let-down station.
The Engineering activities lasted till the
end of 2014 and were developed mainly in
our Milan and Chennai offices.
A robust client team, composed of mana-
gers and technicians from Total were re-
sident on a permanent basis in Milan for
almost a year to facilitate the preparation
and the issue of engineering deliverables
and to speed-up by vis-à-vis meetings the
resolution of the problems encountered
High-Pressure Steam Boilers Unit during detailed design.
In addition, several visits to the Milan office
were performed by Antwerp Refinery per-
sidue import units were cancelled. • Direct construction: 1.6MM mhrs sonnel to verify the compliance with stan-
The execution of the OPTARA Project was dards and procedures.
divided by Total in several lots, assigned to The scope of the high-pressure boilers The Chennai Office was mainly responsi-
different EPC Contractors. As part of this unit 23 was the production of high pres- ble of the sour water stripping and high
process, the contract for the execution of sure steam to meet the increased de- -pressure boiler units and its activities and
the LOT3A was awarded to Foster Whee- mand by new and performance were
ler (now Wood) Milan office in May 2013. existing users. It The LOT3A consisted constantly monito-
The contract was assigned on a lump-sum consists of four new red through mee-
basis for engineering and procurement independent boi- of three main packages: tings, visits and by
services, while construction supervision lers, manufactured“Grass-roots Steam resident coordina-
services were on a reimbursable basis. and supplied by tor.
Materials and construction works orders BBC (Belgium Boiler Boiler, Brown-field new Since a large por-
were placed directly by Total. Company), each-one Sour Water Stripper and tion of the scope
The scope of work finished at the Ready with a capacity of 30 Off-sites and Utilities of work was related
for Commissioning phase. tons per hour of ste- to the revamp of
As part of the scope, we also prepared am. existing facilities, a
a Class II cost estimate, which was then The Sour Water team composed of
used as baseline for the control of the Stripper was designed to strip-off hydro- engineers and draftsmen of piping, civil,
project costs. gen sulfide (H2S) and ammonia (NH3) and electrical and instrument disciplines was
LOT3A consisted of the following three to reduce their con-
main packages that were developed star- centration respectively
ting from the FEED (front-end engineering to 10 ppmw and 50
design) prepared by another company: ppmw from sour water
• Grass-roots Steam Boiler (HPB produced by revamped
-#U23) ARDS and MHC units.
• Brown-field new Sour Water Stripper The Off-site and Utili-
(SWS-#U99) ties covers almost 80%
• Off-sites and Utilities (O&U-#U00) of the overall scope
and includes new fa-
The most significant construction parame- cilities and modifica-
ters of the projects are the following: tions of existing ones
• Piles: 1600 necessary to support
• Concrete: 4500 m3 the new refinery confi-
• Piping: 2500 tons guration.
• Steel structure: 1300 tons Among the most im-
• E/I cables: 155 km portant areas of inter-
• Equipment: 43 vention, we can list:
• Modules 9 • New natural gas
• Overall project: 42 months import station
• Construction span: 28 months • New pumping sta- Natural Gas Import Station

Impiantistica Italiana - Settembre-Ottobre 2018 23