ShipCalculators.com

Estimated Cetane Number (ISO 8217 Annex)

Annex E of ISO 8217 - cetane-number proxy for ultra-low-sulphur distillates (DMA, DMB, DFA, DMZ) when the CFR engine cetane test is not available.

FuelISO 8217
Loading calculator…

Formula, assumptions, and limits

ECN=−386.26+0.174ρ15+141.59log⁡ν40+1.13⋅10−5ρ152−19.64(log⁡ν40)2ECN = -386.26 + 0.174 \rho_{15} + 141.59 \log \nu_{40} + 1.13 \cdot 10^{-5} \rho_{15}^2 - 19.64 (\log \nu_{40})^2
SymbolMeaningUnit
ρ15\rho_{15}Density at 15 °Ckg/m³
ν40\nu_{40}Viscosity at 40 °CcSt
ECNECNEstimated Cetane Number

Source: ISO 8217 Annex E

In short

Annex E of ISO 8217 - cetane-number proxy for ultra-low-sulphur distillates (DMA, DMB, DFA, DMZ) when the CFR engine cetane test is not available.

Learn the theory Bunker Quality and ISO 8217 Marine Fuel Standards