{"id":1308,"date":"2026-07-13T06:21:44","date_gmt":"2026-07-13T06:21:44","guid":{"rendered":"https:\/\/lift-cylinders.com\/?p=1308"},"modified":"2026-07-13T06:21:44","modified_gmt":"2026-07-13T06:21:44","slug":"jack-up-vessel-hydraulic-lift-cylinders","status":"publish","type":"post","link":"https:\/\/lift-cylinders.com\/fr\/application\/jack-up-vessel-hydraulic-lift-cylinders\/","title":{"rendered":"V\u00e9rins de levage hydrauliques pour navires auto-\u00e9l\u00e9vateurs"},"content":{"rendered":"
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APPLICATION GUIDE \u00b7 OFFSHORE & MARINE \u00b7 HYDRAULIC LIFT CYLINDERS<\/span><\/p>\n

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Jack-Up Vessel
\nV\u00e9rins de levage hydrauliques
\nLeg Jacking \u00b7 Spudcan \u00b7 Storm Lock<\/span><\/h1>\n

The hydraulic jacking system on a self-elevating jack-up vessel is one of the most demanding structural engineering challenges in the offshore industry. A large wind-turbine installation jack-up must lift a 20 000-tonne hull clear of the water on three or four lattice legs \u2014 each leg driven by multiple cylinders acting in unison through a rack-and-pinion or direct-drive mechanism. These cylinders must hold the hull elevated against storm wave loads for weeks or months, then lower it with millimetre precision for sea transit. This guide covers the engineering, classification requirements, and service programme for jack-up vessel lift cylinders.<\/p>\n

Leg Jacking<\/span>
\nSpudcan Preload<\/span>
\nStorm Lock<\/span><\/div>\n

LIFT CYLINDERS \u00b7 JACK-UP VESSEL APPLICATION \u00b7 JULY 2026<\/p>\n<\/div>\n<\/header>\n

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REFERENCE \u00b7 JACK-UP LEG JACKING LIFT CYLINDER PARAMETERS<\/p>\n

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PLAGE D'AL\u00c9SAGE<\/p>\n

200\u2013500 mm<\/p>\n

Offshore wind installation jack-ups use the largest leg jacking lift cylinders \u2014 up to 500 mm bore on heavy-lift vessels<\/p>\n<\/div>\n

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PRESSION DU SYST\u00c8ME<\/p>\n

28\u201335 MPa<\/p>\n

High-pressure offshore specification \u2014 each cylinder must generate hundreds of tonnes of leg jacking force<\/p>\n<\/div>\n

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CLASSIFICATION<\/p>\n

DNV \/ ABS \/ BV<\/p>\n

All jack-up vessels require classification society approval for their jacking systems \u2014 DNV GL, ABS, Bureau Veritas, or Lloyd’s Register<\/p>\n<\/div>\n

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HOLD DURATION<\/p>\n

Weeks\u2013months<\/p>\n

Offshore wind turbine installation requires the hull to remain elevated for the full installation campaign \u2014 storm-lock function is essential<\/p>\n<\/div>\n<\/div>\n<\/div>\n