Hydrex keeps vessels out of drydock
Belgian underwater service company, Hydrex, has successfully completed insert repairs on two vessels in Zeebrugge and Antwerp while all commercial activities continued without disruption.
Hydrex teams tended to the vessels which had both suffered cracks in the shell plating. In Zeebrugge a 600mm x 300mm plate was installed in the flat bottom of a 203m ro-ro vessel, while a similar operation was carried out with a 300mm x 300mm plate on a 144m tanker in Antwerp.
Despite the relatively small scale of both operations, Hydrex said they were vital for the shipowners, allowing them to keep their vessels out of drydock and avoid having to go off hire.
Hydrex on-site hull repair services include the renewal of both small and large areas of damaged hull plating. These repairs can be carried out above or below water, according to the circumstances, with external mobdocks.
The team began the operation with a detailed inspection of both the onboard as well as the water side of the affected plating of the vessels. Next, the divers installed a cofferdam over the area, allowing the team to remove the longitudinal frame covering the damage.
The damage was then cut away, a new insert plate positioned and then welded using a full penetration weld.
These repair operations follow the Hydrex procedure for welding cracks and inserts in the vessel's shell plating. An independent inspector carried out ultrasonic testing and the repairs were approved by the classification surveyor.
Hydrex has a wide range of cofferdams as well as certified plating which it can transport to any location around the world.
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