Therefore, the oil must have a density which is sufficiently different from water. The density is also an important parameter for fuel oils since marine fuels are purified before use to remove water and dirt. The unit of measurement of kinematic viscosity is m 2 s -1. Kinematic viscosity is expressed as the ratio of fluid dynamic viscosity to its density. Usually, it is measured in centipoise (cP). Despite this, marine fuels are still quoted on the international bunker markets with their maximum viscosity set by ISO 8217 as marine engines are designed to use different viscosities of fuel. Dynamic viscosity is the resistance to movement of one layer of a fluid over another. Today, almost all marine fuels are based on fractions from more advanced refinery processes and the viscosity itself says little about the oil's quality as fuel. This is a valid criterion for oil quality as long as the oil is produced by atmospheric distillation only. Marine fuels are traditionally classified according to their kinematic viscosity. HFO (Heavy Fuel Oil): a residual fuel oil (No.MFO (Medium Fuel Oil): a blend of MGO and HFO, with less gasoil than IFO.IFO (Intermediate Fuel Oil): a blend of MGO and HFO, with less gasoil than MDO.MDO (Marine Diesel Oil): a blend of MGO and HFO.MGO (Marine Gas Oil): a distillate fuel oil (No. Viscosity: 2.4 cP at 20☌: Surface tension: 21.79 dyn/cm at 15☌: Solubility in water: Miscible in all proportions : Regulatory and Safety Data : DOT Hazard Class: 3, Flammable Liquid: Packing Group: II: UN Identification Number: UN1219 : Storage: Store in an area designed for flammable storage, or in an approved metal cabinet, away from.In the maritime field another classification is used: 5 fuel oil is also called “navy special”. ![]() ![]() ![]() 6 residual fuel oil which requires heating before the oil can be pumped. 6 is the most common oil, that's why "bunker fuel" is often used as a synonym for the No. Overview These conversion tables are provided for your reference. Bunker C corresponds to the residual fuel oil No.Bunker A corresponds to the distillate fuel oil No.Marine fuels are classified using the “Bunker ABC”: We can distinguish between two main types: distillate fuels and residual fuels. Bunker oil is generally any type of fuel oil used aboard ships.
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