The Liebherr RL series (short for Ram Luffing) is a family of offshore cranes manufactured by Liebherr-Rostock GmbH, a subsidiary of the Liebherr Group.
Not much is known about the first cranes in the RL series. In 2015, the Liebherr plant in Nenzing sold its 1000th offshore crane, although this figure presumably includes both RL cranes and cranes from the BOS series.[1]
Two RL cranes installed on the former Castor platform on the coast of Vinaròs, Spain
The RL-K 2600 is the third model of the RL-K subseries and was introduced in 2018.[3]
Design and engineering
Structural design
The RL series employs a ram luffing system with a box-boom and a compact structural design, which reduces weight and maintenance needs while maintaining lifting capability. They represent the most compact cranes in Liebherr’s offshore crane portfolio. Depending on the model, RL cranes have lifting capacities up to approximately 100 tonnes and boom configurations reaching around 58 metres in length.
Features
Standard features across the RL series include safety systems such as manual and automatic overload protection (AOPS), which are required by the european standard EN-13852.[4] Some variants are certified for use in hazardous areas (ATEX and IECEx), meeting requirements for operation on oil and gas platforms.
Certain models of the series also support remote operation, reflecting demand for reduced personnel requirements on offshore installations.[5]
An RL crane installed on the HELWIN BETA platform of HVDC HelWin2
Representative models and technical data
The series includes multiple models differentiated by size and capability, such as RL 650, RL 900, RL 1500, RL 2600, and RL 4600, each with varying maximum outreach and lifting capacities to suit specific offshore tasks.
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Germany 
Austria (formerly)
