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work around the space constraints, S-Oil turned to mobilized an international crew that worked in double
Mammoet to provide a faster lifting solution that would shifts. They completed the whole process in less than
reduce construction downtime. Mammoet responded 7 weeks. Mammoet was on-site and off-site in a record
immediately and proposed the PTC 200 DS ring crane time of 57 days, one month ahead of the original
as the best solution for the job. The PTC 200 DS has a timeline based on the gantry system. This was the first
small footprint with a long reach and high capacity for ever deployment of the PTC 200 DS in South Korea.
lifting. As opposed to the gantry system, it could lift all Mammoet’s approach to use the PTC 200 DS reduced
three columns from a single location. the impact of the works on neighboring areas within
Time was also saved in the assembly and disassembly the refinery and saved a significant amount of time. By
of the PTC. It would usually take up to 12 weeks to cutting 30% off the original timeline, Mammoet was
complete both activities. Mammoet sped up and able to help put the project back on track. Civil works
were able to swiftly resume, minimizing the project’s
construction downtime and bringing S-OIL closer to
opening their new Residue Upgrading Complex.

… and off-shore…

Providing more – and more reliable – electricity to
Indonesian households is an important step to
Indonesia’s growing population future prosperity. Which
is why, in 2016, a consortium led by Saipem was
commissioned to tap an important gas field off the
Indonesian coastline. Essential to this project was a
floating production unit: a facility capable of processing,
storing and transporting gas to the mainland via
underwater pipelines. To save time, the unit, called
Jangkrik, was built in two parts – the hull in South
Korea and the topside module on the Indonesian island
of Karimun. It was the first time anyone had ever
attempted to skid and load-out a 14,273 ton module
Fertilizer vessel installation onto a floating production unit hull.
Mammoet had engineered and executed complex
skidding projects before, but Jangkrik
was different. To begin with, at over
192 m long and 46 m wide, the
Jangkrik module was massive.
Secondly, early on in the process the
decision was made to construct the
topside on land and skid the integrated
module in its entirely onto the hull. Not
only would constructing the topside on
land save a significant amount of time
in building and testing, but it would
also significantly increase the project’s
safety by avoiding the challenges and
risks of connecting and integrating
smaller modules onto the hull at sea.
However, to achieve this required a
close collaboration by all the parts
involved, who needed to adjust the
module’s design and engineering so
that it could eventually be skidded into
place. The hull design needed to be
adjusted as well.
During preparations, construction and
Ballasting during load-out load-out, nothing was left to chance.

IndustrIal Plants - May 2018
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