FUEL OIL SPECIFICATION

Ash

Ash is the inorganic solid residue left after combustion.

Calorific Value

This is the heat liberated by the combustion of a fuel.

Carbon Residue

This is a laboratory measurement which can give an indication of the carbon deposit forming tendency of a fuel oil.

Centistokes (cSt)

A unit of kinematics viscosity, numerically equivalent to the SI unit mm2/sec.

Cetane Number

This is a measurement of the ignition quality of distillate fuel. A high cetane number indicates shorter ignition lag and a cleaner burning fuel.

Density

This is the mass (weight in vacuum) of a liquid per unit volume.

Diesel Index

This is an indicator of the ignition quality calculated using the relative density and aniline point.

Flash Point

The flash point limit is set as a safeguard against fire and is the only parameter of a marine fuel .

Ignition Quality

This is the ability of a fuel to ignite, and is measured as the delay between the start of injection and the start of the combustion.

Sulphur

Sulphur in fuel is of great concern because of it's potentially harmful effect when converted to sulphuric acid during the combustion process.

Vanadium

Vanadium is present in fuel in soluble compounds and cannot be removed.

Viscosity

Viscosity is the resistance of a fluid to flow.

Water

Water in fuel should be removed by centrifuging the fuel before use.

The International Standard for

Marine Fuels

IFO 40 IFO 80 IFO 180 IFO 380

  RMA10 RMB10 RMC10 RMD15 RME25 RMF25 RMG35 RMH35 RMK35 RML35

Density @

15  КC0,975 0,991 0,991 0,991 0,991 0,991 0,991 0,991 --- ---

Viscosity @

50  КC40,0 40,0 40,0 80,0 180,0 180,0 380,0 380,0 380,0 380,0

Viscosity @

100  КC10,0 10,0 10,0 15,0 25,0 25,0 35,0 35,0 35,0 35,0

Flash Point

(КC)60 60 60 60 60 60 60 60 60 60

Pour

Point :Winter,

Summer

( КC)

0 24(0) 24 30 30 30 30 30 30 30

6 24(6) 24 30 30 30 30 30 30 30

Carbon Residue

(%)10 10 14 14 15 20 18 22 22 --

Ash (%) 0,10 0,10 0,10 0,10 0,10 0,15 0,20 0,20 0,20 0,20

Water (%) 0,50 0,50 0,50 0,80 1,0 1,0 1,0 1,0 1,0 1,0

Sulphur 3,5 3,5 3,5 4,0 5,0 5,0 5,0 5,0 5,0 5,0

Vanadium

(ppm)150 150 300 350 200 500 300 600 600 600

Al + Si (ppm) 80 80 80 80 80 80 80 80 80 --

Sediment 0,10 0,10 0,10 0,10 0,10 0,10 0,10 0,10 0,10 --

Potential (%)