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Lloyd’s Register’s FOBAS has found that several samples of very low sulphur fuel oil (VLSFO) from these two UK ports showed Total Sediment Potential (TSP) results exceeding the ISO 8217 specification limit of 0.10% m/m.

The TSP results ranged from 0.22% m/m to 0.29% m/m and FOBAS noted that extended analysis of the samples indicated that the offs-spec results were due mainly to extraneous dirt.

FOBAS highlights that fuels with high sediments can result in excessive sludge deposition in tanks and throughout the handling and treatment/fuel injection systems. In certain cases the attempted use of such fuels may result in highly compromised combustion leading to engine and turbocharger damage.

In addition to the above, fuels containing a high amount of extraneous dirt can result in heavy loading on purifiers which can lower the purifier plant efficiency with respect to removing harmful contaminants such as aluminium, silicon, and / or water. Purifiers should be monitored and operational adjustments made as necessary.

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