The ring crane was used to lift and replace coke drums weighing 270 tonnes a piece.
Mammoet
Choosing the right tools for the job
Mammoet was brought in during the planning stages to conduct a feasibility analysis, assess which equipment would be best to remove the old drums and get the new ones delivered to site and installed.
“In terms of the importance of the project and getting everything done within a specific timeline, this turnaround was completed safely, ahead of budget and schedule,” explains Kurt Reid, sales manager at Mammoet. “With the daily cost being significant, it was essential that planning happened years in advance”.
Mammoet was an integral part of the project for over seven years prior to execution, discussing the timing of lifts and movements. Its engineers undertook an entire crane review, assessing every suitable model in Mammoet’s fleet to select the right equipment for the jobs. The biggest consideration wasn’t weight, but reach.
The engineering team first considered using an LR 11350 crawler crane placed beside an upgrader wall, but the option wasn’t feasible because it interfered with concurrent operations and maintenance work in the area.
Finally, Mammoet’s PTC210DS ring crane was selected. It has the capacity to not only lift the heaviest component (a six-drum derrick weighing over 1,200 tonnes) but, thanks to its impressive reach capacity, could be assembled further away to not disrupt other on-site work.
As the PTC had to be erected inside the coke pit, civil work was needed to strengthen the ground beneath it. Around 200 piles were driven into the ground to build a solid foundation.
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