In 2006, Wagenborg exchanged a rotation cooler at BP in Lingen, Germany. After seven years of faithful service, the cooling unit needed to be replaced. Because of our earlier experience with this cooler exchange operation, Wagenborg was again awarded the contract to replace the cooler. The dimensions of the cooling unit are 24.55 m long, with a diameter of 3.5 m and a weight of 103 tonnes.

However, due to changes in the design of the cooling unit, the exchange concept of 2006 was no longer suitable. Wagenborg’s Engineering Department therefore developed a new technical concept for the exchange operation, which perfectly fitted both the old and new cooling unit. 

Wagenborg was asked to transport the new cooling unit from the fabrication shop in Stassfurt to the project site in Lingen by a 16-axle line conventional trailer. The new unit was stored at a temporary storage area. In the meantime, the skidding system was assembled on site. 

he exchange operation consisted of various phases. One of them was like a railway switch. The cooler was positioned between two concrete foundations and the only way to free the unit was by skidding it backwards beyond the first foundation. Then, the skidding track with the cooling unit on top was turned 20 degrees so the unit could be skidded out of the construction. Two mobile cranes of 200 tonnes capacity lifted the old unit from the skid beams and loaded it onto SPMTs for transport to the storage area. 

The cranes moved to the storage area to offload the old unit and load the new unit onto SPMTs. After that, they were relocated smoothly to the plant again to lift and position the new unit onto the skid track. With a reverse skidding operation, the new cooler was delivered onto its foundations, ready for seven years of smooth operations.

An enjoyable and challenging job for Wagenborg Nedlift and Wagenborg GmbH!

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