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A2-grade fuel oil is used for off-road applications. Learn the required specifications of A2 grade fuel in BS 2869.
A2 grade fuel is used for off-road applications on domestic and commercial levels, including agricultural machinery, boilers, generators, construction equipment, etc. It is the highest-grade diesel fuel that meets BS 2869 fuel specifications. Red diesel is an A2-grade fuel oil that is used in untaxed commercial and domestic vehicles and machinery.
Let’s learn about the specifications of A2-grade red diesel.
Parameter | Maximum | Minimum | Typical | Unit |
Appearance | Clear & bright, cherry red, free from visible sediments | |||
Ash content | 0.01 | – | <0.01 | % (m/m) |
Carbon | – | – | 87 | % (m/m) |
Carbon residue(Ramsbottom on 10% residue) | 0.3 | – | 0.1 | % (m/m) |
Cetane number | – | 45 | 48 | – |
Cold filter plugging point(1) Summer | -4 | – | -8 | °C |
Cold filter plugging point(1) Winter | -12 | – | -14 | °C |
Copper corrosion(3 hrs at 50°C) | 1 | – | 1a | Class |
Density at 15°C | – | 0.82 | 0.86 | kg/m³ |
Distillation recovery at 250°C | 65 | – | 42 | % (v/v) |
Distillation recovery at 350C | – | 85 | 92 | % (v/v) |
Fatty acid methyl ester (FAME) | 7 | – | <0.1 | % (v/v) |
Flashpoint (PMCC) | – | 56 | >62 | °C |
Gross specific energy (MJ/kg) | – | – | 45.4 | MJ/kg |
Gross specific energy (MJ/litre) | – | – | 38.8 | MJ/litre |
Hydrogen | – | – | 12.75 | % (m/m) |
Kinematic viscosity at 40°C | 5.5 | 1.5 | 3 | mm²/s |
Lubricity (HFRR) | 460 | – | <460 | µm |
Mean specific heat capacity over 0 – 100°C | – | – | 2.05 | KJ/kg °C |
Nitrogen | – | – | 0.01 – 0.05 | % (m/m) |
Oxidation stability 0.0 – 7.0% FAME | 25 | – | – | g/m³ |
Oxidation stability 2.0 – 7.0% FAME | – | 20 | – | h |
Particulate content | 24 | – | <10 | mg/kg |
Strong acid number | nil | – | nil | mg KOH/g |
Sulphur content | 0.002 | – | <0.098 | % (m/m) |
Volume correction factor | – | – | 0.00081 | per °C |
Water content | 200 | – | <100 | mg/kg |