• 2015 September 30 15:21

    Cathelco supply equipment for series of newbuilds in Turkey

    Cathelco have received a series of orders from shipyards in Turkey for their ICCP hull corrosion protection and seawater pipework anti-fouling systems, the company said in its press release.

    One of the orders for equipment has come from the Tersan Shipyard where a subsea IMR & construction vessel is being built for Volstad Shipping of Norway. The new ship which has a length of 128.5m and a beam of 25m is of ST-259 design and due to be delivered in the last quarter of 2015.

    The hull of the vessel will be protected against corrosion with a Cathelco impressed current cathodic protection (ICCP) system. This consists of an arrangement of hull mounted disc anodes and reference electrodes wired to a control panel. In operation, the anodes emit a current which neutralises the electro-chemical activity which causes corrosion. The system is constantly monitored via the reference electrodes which measure the electrical potential at the hull/seawater interface and send a signal to the control panel which raises or lowers the anode output accordingly.

    Cathelco will also be providing a seawater pipework anti-fouling system for the vessel to protect engine cooling lines against blockages caused by barnacles and mussels.

    Tersan Shipyard has ordered similar equipment for a multi-purpose platform supply vessel which is being constructed for Tidewater Marine. Designed for arctic conditions, the vessel will be operated by the Norwegian Troms Offshore Supply Group, a subsidiary of Tidewater.
    “As the Volstad and Tidewater vessels are designed for cold climate conditions to DNV DEICE class, the ICCP control panels provide a higher ‘driving’ force of 50 volts. This is because Arctic waters contain more fresh water resulting in higher resistivity which needs to be overcome with a higher voltage”, said Anna Siodlak , who has been closely involved in the project at Cathelco.

    Another order has come from the Besiktas Shipyard in Yalova where a Live Fish Carrier is being built for Intership AS, Norway. The 69.80m vessel designed for carrying live species of farmed fish will be installed with a Cathelco ICCP hull corrosion protection system together with a seawater pipework anti-fouling system.

    Cathelco pipework anti-fouling systems eliminate blockages caused in seawater cooling lines and ancillary equipment caused by the growth of barnacles and mussels. The system consists of copper and aluminium anodes which are installed in seachests or strainers and wired to a control panel. In operation the copper anode produces ions which are carried by the flow of seawater and create an environment where barnacle and mussel larvae do not settle. The aluminium anode (or ferrous in the case of cupro-nickel pipework on the live fish carrier) creates ions which produce an anti-corrosive layer on the internal surfaces of pipes.

    Last but not least, the Ozata Shipyard has ordered Cathelco seawater pipework anti-fouling systems for four passenger ferries which are being built for the Izmir Metropolitan Municipality.

    Built of carbon composite material for strength and lightness, the 39m vessels have the capacity to carry more than 400 passengers at speeds of up to 40 knots.

    Cathelco will be supply Omni anodes for installation in four strainers, two serving engine cooling systems, one for air conditioning and another serving a winch.


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