Page 22 - Impiantistica Industriale

Stage 6 – Module execution
phase

During this stage of the project, detailed enginee-
ring was carried out to finalise module design and
build.
The Project Execution Plan for the module execu-
tion phase considered the following issues:
Engineering
• Accelerated engineering activities compared
with a conventional approach. In particular,
structural design required a greater effort at
the commencement of this phase;
• Foundation and underground design should
incorporate module, crane and transportation
requirements;
• Documents and drawings shall be produced
on a module-by-module basis, in alignment
with the needs of the construction schedule,
and must address the detailed module design
requirements, such as cable routing, hook-up
access, etc. Each module was set up as one
or more separate construction area(s) in the
project to facilitate this.
• Weight management and centre-of-gravity con-
trol throughout the module execution phase;
• Module envelope management;
• Multiple critical paths and sequences within
the schedule.
Procurement
• Accelerated procurement activities compared
with the conventional approach;
• More material take-offs and purchase order Legs-down PARs on SPMT
top-ups should be anticipated;
• Equipment and bulk materials, needed early
for free issue to module fabricators, at several dule-building focused on early punch out and
locations. completion of modules and their associated
Construction hook-up spools;
• At the fabrication yards, management of mo- • Pre-commissioning at the mechanical module
yards, including chemical cleaning;
• Functional electrical tests at the substation
module yard;
• At the plant site undergrounds and paving
completed before modules are transported to
the corresponding area;
• Transportation and handling of the modules,
with detailed plans covering all interfaces, to
ensure safe and timely installation;
• Plan to manage out of sequence delivery of
modules;
• Hook-up phase treated as a major plant ‘tur-
naround’.
Detailed engineering, procurement, subcontrac-
ting, construction, pre-commissioning and support
to owner commissioning and start-up have been
executed in work sharing by Amec Foster Whee-
ler’s Milan and Singapore home offices, bringing
together the experience of Milan on Cogen and
Legs-up PARs loaded on the barge modular plants and Singapore’s knowledge of the

20 Impiantistica Italiana - Settembre-Ottobre 2017