Tab 12-1
Specifications for HFO
Parameter
Bunker limit
At engine inlet
Unit
Test method
Kinematic viscosity
at 50°C
Maximum 700
13 to 17
1
(not related
to temperature)
mm
2
/s [cSt]
2
ISO 3104
Density at 15°C
Maximum 1010
3
Maximum 1010
kg/m
3
ISO 3675/12185
CCAI
Maximum 870
Maximum 870
-
Calculated
Sulphur
4
Statutory specifica-
tions
Maximum 3.5
mass %
ISO 8754/14596
Flash point
Minimum 60
Minimum 60
°C
ISO 2719
Hydrogen sulphide
5
Maximum 2.0
Maximum 2.0
mg/kg [ppm]
IP 570
Acid number
Maximum 2.5
Maximum 2.5
mg KOH/g
ASTM D 664
Total sediment,
aged
Maximum 0.1
Maximum 0.1
mass %
ISO 10307-2
Carbon residue: mi-
cro method
Maximum 20
Maximum 20
mass %
ISO 10370
Pour point (upper)
6
Maximum 30
Maximum 30
°C
ISO 3016
Water
Maximum 0.5
Maximum 0.2
volume %
ISO 3733
Ash
Maximum 0.15
Maximum 0.15
mass %
ISO 6245
Vanadium
Maximum 450
Maximum 450
mg/kg [ppm]
ISO 14597/IP501/
IP470
Sodium
Maximum 100
Maximum 30
mg/kg [ppm]
IP501/IP470
Aluminum plus Sili-
con
Maximum 60
Maximum 15
mg/kg [ppm]
ISO 10478/IP501/
IP470
Used lubricating oils
(ULO) must not be
present: Calcium
(Ca) and zinc (Zn)
ULO shows if: Ca>30
and Zn>15 or Ca>30
and P>15
Do no use if: Ca>30
and Zn>15 or Ca>30
and P>15
mg/kg [ppm]
IP501 or IP470 or
IP500
1
For Generation X, X-DF and RT-flex engines, the fuel viscosity at the engine inlet must be
in the range between 10 mm
2
/s and 20 mm
2
/s, but WinGD recommends a fuel viscosity at
the engine inlet in the range between 13 mm
2
/s and 17 mm
2
/s. The maximum permitted
temperature is 150°C.
2
1 mm
2
/s = 1 cSt (Centistoke)
3
The maximum density limit is 991 kg/m
3
if the fuel treatment plant cannot remove water from
high-density fuel.
4
In ISO 8217:2017 sulphur limits are not given for HFO. Sulphur limits are related to statutory
specifications.
5
The hydrogen sulphide limit is applicable from 1st July 2012.
6
Purchasers must make sure that the equipment on board can always keep the fuel at a
temperature above the pour point, specially in cold climates.
It is very important that the fuel is fit for purpose in the related engine application.
X72-B
AA00-0000-00AAA-030A-A
Operation Manual
Diesel engine fuels
Winterthur Gas & Diesel Ltd.
- 510 -
Issue 003 2021-12
