Milestone reached towards Alfa Lift completion

ON 7 MARCH 2021, THE DECK CARGO SHIP BIGLIFT BARENTSZ LEFT THE LIEBHERR SITE AT THE PORT OF ROSTOCK WITH TWO REMARKABLE, GIANT CRANE COMPONENTS READY FOR INSTALLATION.

ALL PHOTOS COURTESY OF LIEBHERR.

The white painted slewing platorm, as well as the characteristc A-frame of the upcoming Heavy Lif Crane HLC 150000, are now on their way to being assembled on OHT’s next-generaton ofshore wind foundaton vessel Alfa Lif. With its combinaton of features, the Liebherr HLC series will be a key element for installing current and future wind farms around the world.

Following their arrival in China, the slewing platorm and the A-frame will be the frst crane sectons to be assembled on the Ulstein designed ofshore installaton vessel Alfa Lif. The tandem lif of the two large components was realised at the Liebherr site in Rostock using two strong representatves of their kind: the LR 11350 crawler crane and the TCC 78000, once again proving the importance of this powerful rail-mounted heavy-duty gantry crane. The lifs will take place directly at the quay, therefore the transportaton vessel was able to start its journey by taking the shortest route to the Baltc Sea. The slewing platorm and the A-frame will be assembled on Alfa Lif at the shipyard of China Merchants Heavy Industry (CMHI) in the province Jiangsu, close to Shanghai. When the installaton of the two components is fnalised, the boom will be delivered just-in-tme to complete the HLC 150000.

“The crane can only be assembled and installed once the vessel has reached a specifc phase in its constructon. Therefore, the manufacturing tmelines are fnely balanced between Liebherr, OHT, and CHMI”, says Gregor Levold, Sales Director of Ship and Ofshore Cranes at Liebherr Rostock. “Another important element of the partnership with OHT is our support and guidance for the inital setup of the crane onboard Alfa Lif. Due to the extensive experience of our experts, a team of Liebherr specialists will travel to China and support with supervision for the installaton, commissioning, and testng process (ICT) of the HLC 150000 at the shipyard.” Bjarne Birkeland, Head of Vessel Management for OHT, shares, “We have recently reached a signifcant milestone in the constructon of Alfa Lif with the launch of the vessel, and we are grateful to see the high quality Liebherr 3,000t Heavy Lif Crane components being shipped from their facilites, ready for the next big milestone. We look forward to seeing the crane installed on the vessel and thank the experts at Liebherr for their excellent cooperaton and diligence.”

With a maximum lifing capacity of 3,000t at 30m and 1,000t at 76m outreach, the HLC 150000 is ready for a wide range of >>

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applicatons. In general, the Liebherr HLC series design is characterised by a small footprint. The slew bearing diameter of the HLC 150000 is just 14m, consequently, the crane requires litle space on deck and ofers more storage space. Thanks to the special slip ring confguraton, the HLC has a 360° unlimited slewing range. In additon, the Liebherr HLC’s foldable A-frame reduces the height of the crane as needed. “Unlike many other crane vessels of this size, the Alfa Lif will be able to navigate waters crossed by bridges. This feature reduces transit-tme, for instance when the vessel enters the Baltc Sea crossing the Storebaltsbroen in Denmark”, Mr Levold explains. “The foldable A-frame provides more fexibility, which in turn leads to both operatonal and cost-efciency, increasing the number of charter days and vessel availability.” For faster maintenance during operaton, all components of the HLC are safely accessible via stairs and platorms. A key element of the maintenance concept is the integrated telescopic knuckle boom crane that is capable of lifing up to six tonnes. This service crane allows the exchange of the heaviest single components without the help of an external crane.

The heavy lif crane series at Liebherr serves a worldwide growing market in ofshore wind installaton contributng to a sustainable energy provision. At the same tme, existng ofshore oil and gas installatons will be decommissioned in larger sectons to reduce transport costs. To meet these requirements in the best way, cross-divisional development and state-ofthe-art manufacturing processes are key factors for projects in both sectors. “Customers for this type of crane have very high quality and reliability demands, which we can meet and exceed”, says Mr Levold. “Our cranes are made in Europe with strong partners within the Liebherr Group as well as proven and reliable external suppliers. Main components like winches, slew bearing, and slewing drives of the crane are designed and manufactured by other Liebherr companies. This results in an independent supply chain and guaranteed availability of components.” Since the feature-rich HLC series can be used for a wide variety of operatons, the worldwide interest in the Liebherr heavy lif cranes keeps growing steadily. In 2022, the HLC 150000 onboard Alfa Lif will start operatng in the North Sea. The frst project is the constructon of the wind farm Dogger Bank A, about 130km of the north-east coast of England.