Wartsila 34DF Series - 6.1.2 Liquid fuel specification

cording to special requirements. Also the low viscosity (min. 1.4 cSt) can prevent the use in engines
unless the fuel can be cooled down enough to meet the min. injection viscosity limit of the engine.
• DMA: A high quality distillate, generally designated as MGO (Marine Gas Oil).
• DMZ: A high quality distillate, generally designated as MGO (Marine Gas Oil). An alternative fuel grade
for engines requiring a higher fuel viscosity than specified for DMA grade fuel.
• DMB: A general purpose fuel which may contain trace amounts of residual fuel and is intended for
engines not specifically designed to burn residual fuels. It is generally designated as MDO (Marine
Diesel Oil).
Table 6.2 MDF specifications
Test method ref.ISO-F-DMBISO-F-DMZISO-F-DMAUnitProperty
2.02.02.0cStViscosity before pilot fuel pump, min.
1)
11.011.011.0cStViscosity, before pilot fuel pump, max.
1)
2.02.02.0cStViscosity, before main injection pumps, min.
1)
24.024.024.0cStViscosity, before main fuel injection pumps,
max.
1)
232cStViscosity at 40°C, min.
ISO 31041166cStViscosity at 40°C, max.
ISO 3675 or
12185
900890890kg/m³Density at 15°C, max.
ISO 4264354040Cetane index, min.
ISO 8574 or
14596
21.51.5% massSulphur, max.
ISO 2719606060°CFlash point, min.
IP 570222mg/kgHydrogen sulfide. max.
2)
ASTM D6640.50.50.5mg KOH/gAcid number, max.
ISO 10307-10.1
3)
——% massTotal sediment by hot filtration, max.
ISO 1220525
4)
2525g/m
3
Oxidation stability, max.
ISO 10370—0.300.30% massCarbon residue: micro method on the 10%
volume distillation residue max.
ISO 103700.30——% massCarbon residue: micro method, max.
ISO 30160-6-6°CPour point (upper) , winter quality, max.
5)
ISO 3016600°CPour point (upper) , summer quality, max.
5)
3) 4) 7)
Clear and bright
6)
—Appearance
ISO 37330.3
3)
——% volumeWater, max.
ISO 62450.010.010.01% massAsh, max.
ISO 12156-1520
7)
520520µmLubricity, corrected wear scar diameter (wsd
1.4) at 60°C , max.
8)
Remarks:
Additional properties specified by Wärtsilä, which are not included in the ISO specification.
1)
The implementation date for compliance with the limit shall be 1 July 2012. Until that the specified value is given
for guidance.
2)
If the sample is not clear and bright, the total sediment by hot filtration and water tests shall be required.
3)
If the sample is not clear and bright, the test cannot be undertaken and hence the oxidation stability limit shall
not apply.
4)
It shall be ensured that the pour point is suitable for the equipment on board, especially if the ship operates in
cold climates.
5)
If the sample is dyed and not transparent, then the water limit and test method ISO 12937 shall apply.
6)
If the sample is not clear and bright, the test cannot be undertaken and hence the lubricity limit shall not apply.
7)
Product Guide Wärtsilä 34DF - 3/2012 37
Product Guide
6. Fuel System