Offshore The Cathelco system has been successfully applied to all types of offshore structures including oil rigs, oil platforms, semi-submersible and jack-up rigs using seawater for cooling or emergency fire fighting purposes. Special anode units have been designed for offshore applications which are mounted in-line with the strainer on the seawater stilling tube. Alternatively, anodes can be fitted within large diameter pipes or in purpose built electrolysis tanks.
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