Tokyo: ClassNK has announced that it will release the English edition of Version II of its previously well-received Guidance for Measures to Cope with Degraded Marine Fuels: Taking into Account the Poor Combustibility of Fuels in November.
While the first 1996 edition (Ver. I) dealt with methods to prevent increases in major damages attributable to fuel oil, the updated 2008 edition (Ver. II) focuses on means to avert FO problems that can arise from poor combustibility. The text gives a good technical explanation of the many factors that contribute to problems caused by poor combustibility and the various measures that can be taken to address these issues. Key factors affecting FO problems noted in 1996 consist of the four “highs”: high density, high viscosity, high sulfur, and high catalytic fines. Key factors affecting FO problems in 2008, however, have shifted to one “high” and three “lows”: high density, low viscosity, low sulfur, and low catalytic fines. The contents of this updated and revised Guidance include a discussion on the shift in factors affecting FO problems and examine FO with poor combustibility, low-sulfur FO, ISO standards, emission regulations, FO processing systems, and countermeasures for improving FO use.
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