Hydrex designs tailor made cofferdam for underwater replacement of boss head bolts of main propeller of ro/ro vessels

摘要

When several of the boss head bolts of the main propeller of a ro/ro vessel were found to be missing, the manufacturer asked Hydrex to engineer a solution that would allow the replacement of these bolts on the vessel and similar vessels without having to go to dry-dock. In close communication with the manufacturer, the Hydrex engineering department designed a special cofferdam that would fit the specific needs of these operations. This was comple- mented with a special procedure set up by the Hydrex technical department that would make sure that all safety and quality demands could be met during the replacement.