Enerpac supplied the high pressure, hydraulic cylinder technology for the topsides lift system beams on the Allseas Pioneering Spirit vessel.
The cylinders are an integral part of the vessel’s lift system, enabling the installation and decommissioning of complete topsides weighing up to 48,000-tonne.
Pioneering Spirit is the world’s largest platform installation/decommissioning and pipelay vessel. The vessel’s 16 lifting beams feature 64 Enerpac CLRG-Series high-tonnage double-acting hydraulic cylinders arranged in groups of four. Designed specifically for heavy lifting up to 1000-tonne, the cylinders were delivered within three months of Enerpac signing the contract with Allseas.
The Enerpac double-acting cylinders provide very high levels of precision and control; essential factors in successful heavy lifting. This level of lifting accuracy enables the Pioneering Spirit to use the fast-lift method. During installation and decommissioning, the lifting beams are extended allowing platform topsides to be lifted several meters.
These 1000-tonne cylinders were designed by Enerpac’s engineering team near Madrid, Spain, and produced in Hengelo, The Netherlands.
The Enerpac hydraulic cylinders are chemically-treated to ensure corrosion resistance. The parts were first subjected to NiCr 80/20 plasma spray, then with an AlTi plasma spray. Two layers of special coating to close the pores of the steel followed this. The final baked enamel finish and plated pistons for each cylinder are compliant with the NORSOK M-501 standard for surface preparation and protective coating.
Image: 1000-tonne hydraulic cylinders/Enerpac