WÄRTSILÄ WARTSILA32, Product Manual, Page: 79 / 254

6.1.4 Crude oil
The engine can be operated on crude oil, according to the specification below, without reduction
in the rated output. Since crude oils exist in a wide range of qualities the crude oil feed system
shall be designed on a case-by-case basis.
Table 6-5 Crude oil specification
Test method Limit Unit Fuel property
2.0 cSt Viscosity, before injection pumps, min.
24.0 cSt Viscosity, before injection pumps, max.
ISO 3104 700 cSt/50°C Viscosity, max.
ISO 3675 or 12185 991 /1010 1) kg/m 3 at 15°C Density, max.
ISO 8217 870 CCAI, max.
ISO 3733 0.3 % volume Water before engine, max.
ISO 8754 or 14596 4.5 % mass Sulphur, max.
ISO 6245 0.15 % mass Ash, max.
ISO 14597 or IP 501 or
407
450 mg/kg Vanadium, max.
ISO 10478 30 mg/kg Sodium before engine, max.
ISO 10478 or IP 501 or
470
15 mg/kg Alu Silicon before engine, max.
IP 501 or 500 for CA
ISO 10478 for K and Mg
50 mg/kg C Pot Magnesium before engine,
max.
ISO 10370 20 % mass Carbon residue, max.
ASTM D 3279 14 % mass Asphaltenes, max.
ASTM D 323 65 kPa at 37.8°C Reid vapour pressure (RVP), max.
ISO 3015
IP 309
60 2) °C Cloud point or
Cold filter plugging point, max.
ISO 10307-2 0.1 % mass Total sediment potential, max.
IP 399 5 mg/kg Hydrogen sulphide, max.
ISO 3016 30 °C Pour point (upper), max
ASTM D664 3 mg KOH/g Acid number, max.
Remarks:
Max. 1010 kg/m 3 at 15 °C, provided that the fuel treatment system can remove water and solids. 1)
Fuel temperature in the whole fuel system including storage tanks must be kept 10 – 15 °C above the cloud point during
stand-by, start-up and operation in order to avoid crystallization and formation of solid waxy compounds (typically paraffins)
causing blocking of fuel filters and small size orifices. Additionally, fuel viscosity sets a limit to cloud point so that the fuel
must not be heated above the temperature resulting in a lower viscosity before the injection pumps than specified above. 2)
Lubricating oil, foreign substances or chemical waste, hazardous to the safety of the installation
or detrimental to the performance of the engines, should not be contained in the fuel.
Wärtsilä 32 Product Guide - a21 - 7 September 2016 6-7
6. Fuel Oil System Wärtsilä 32 Product Guide