ClassNK type approves single-coat ballast tank coating system

ClassNK (Nippon Kaiji Kyokai) says it has awarded type approval under PSPC (Performance Standard for Protective Coatings) to the world’s first alternative coating system for ballast tanks. The approval, the first of its type to be issued by any classification society, has been given to a single-coating system manufactured by Nippon Paint Marine Coatings Co., Ltd.

Under PSPC, conventional epoxy coating systems are required to comprise two coatings. The standard does, though, have a provision that allows for alternative systems, such as the one approved by ClassNK, with only a single coating. A key function of the system developed by Nippon Paint Marine Coatings is the “SI (Self-Indicating)” feature whereby the color of the coating changes depending on its thickness. The application of this coating system to ships will begin upon confirmation from relevant administrations by ClassNK.

The PSPC standard provides technical requirements for protective coatings in dedicated seawater ballast tanks of all type of ships of not less than 500 gross tonnage and double-side skin spaces arranged in bulk carriers of 150 m in length and upwards for which the building contract is placed, the keels of which are laid or which are delivered on or after the dates referred to in SOLAS regulation Ⅱ-1/3-2 as adopted by resolution MSC216(82).

January 5, 2012