Bunker fuel contamination cases are on the rise again
Bunker fuel analysis indicates more cases of contaminated bunker fuel in the Rotterdam and Amsterdam areas (ARA), suggesting that the problem persists. Earlier, Veritas petroleum services (VPS) issued a bunker alert in early July 2022 regarding the same issue.
VPS reported that they had investigated samples of very low sulphur fuel oil (VLSFO) taken in the ARA region following reports that vessels using these fuels were experiencing operational problems, such as excessive wear of fuel pump plungers, barrels and injectors. One vessel lost propulsion and had to be towed, and the failure started with engines unable to take the load due to damage within the fuel system.
Using GC-MS (Gas Chromatography-Mass Spectrometry) analysis methodology, numerous volatile organic compounds were detected within these fuel samples.
The organic compounds that were detected in these fuel samples are Phenols, Styrenes, Alcohols and Ketonic compounds, ranging up to 40,000 ppm (4%) in total. This range of combinations does not originate from normal refinery processes and indicates contamination. Phenol-like compounds are often associated with fuel pump wear and damage.
The type of problems reported by the vessels was similar to those found with the recent Singapore chlorinated hydrocarbon issues, but the contaminants were different this time.
Further, recent analyses by VPS using samples from the same region showed that the fuels had high total acid numbers (TAN), and all contained abnormally high potassium levels. Elevated Potasium can lead to increased combustion deposits.
Due to the severity of the problems faced, it will be prudent to pre-test the fuels bunkered using accredited testing methods as a precautionary measure to detect these contaminants and assess the risk that each bunker stem poses to machinery.
During an actual claim scenario, the ability to properly pursue or defend bunker quality claims depends on the quality of the evidence. Good record-keeping is essential to the entire process, and the importance of proper bunker sampling cannot be overstated.
Director of Risk Assessment
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In the third of our Ask an Expert video series Ian Crutchley (Customer Account Manager with VPS) and Paul Parkinson (Group Oil Condition Monitoring Business Development Leader for VPS), discuss the fuel, in terms of what has changed after the introduction of VLSFO, how these changes might be effecting the machinery as well as cylinder lubrication aspects.