6.1.3
Heavy fuel oil operation (residual)
The fuel specification “HFO 2” is based on the ISO 8217:2017(E) standard and covers the fuel
categories ISO-F-RMA 10 – RMK 700. Additionally, the engine manufacturer has specified
the fuel specification “HFO 1”. This tighter specification is an alternative and by using a fuel
fulfilling this specification, longer overhaul intervals of specific engine components are
guaranteed (See the Engine Manual of a specific engine type).
Table 6-2
Residual fuel specifications
Test method reference
Limit
HFO 2
Limit
HFO 1
Unit
Characteristics
-
20 ± 4
20 ± 4
mm
2
/s
b)
Kinematic viscosity bef. inj. pumps
e)
ISO 3104
700,0
700,0
mm
2
/s
b)
Kinematic viscosity at 50 °C, max.
ISO 3675 or ISO 12185
991,0 /
1010,0
a)
991,0 /
1010,0
a)
kg/m
3
Density at 15 °C, max.
ISO 8217, Annex F
870
850
-
CCAI, max.
f)
ISO 8754 or ISO 14596
Statutory require-
ments
%m/m
Sulphur, max.
c, g)
ISO 2719
60,0
60,0
°C
Flash point, min.
IP 570
2,00
2,00
mg/kg
Hydrogen sulfide, max.
ASTM D664
2,5
2,5
mg KOH/g
Acid number, max.
ISO 10307-2
0,10
0,10
%m/m
Total sediment aged, max.
ISO 10370
20,00
15,00
%m/m
Carbon residue, micro method, max.
ASTM D3279
14,0
8,0
%m/m
Asphaltenes, max.
d)
ISO 3016
30
30
°C
Pour point (upper), max.
e)
ISO 3733 or ASTM
D6304-C
d)
0,50
0,50
%V/V
Water, max.
d)
ISO 3733 or ASTM
D6304-C
d)
0,30
0,30
%V/V
Water before engine, max.
d)
ISO 6245 or LP1001
d, i)
0,150
0,050
%m/m
Ash, max.
IP 501, IP 470 or ISO
14597
450
100
mg/kg
Vanadium, max.
g)
IP 501 or IP 470
100
50
mg/kg
Sodium, max.
g)
IP 501 or IP 470
30
30
mg/kg
Sodium before engine, max.
d, g)
IP 501, IP 470 or ISO
10478
60
30
mg/kg
Alu Silicon, max.
d)
IP 501, IP 470 or ISO
10478
15
15
mg/kg
Alu Silicon before engine, max.
d)
IP 501 or IP 470
IP 501 or IP 470
IP 501 or IP 500
30
15
15
30
15
15
mg/kg
mg/kg
mg/kg
Used lubricating oil
h)
- Calcium, max.
- Zinc, max.
- Phosphorus, max.
6-6
DAAB605814
Wärtsilä 46F Product Guide
6. Fuel Oil System
Summary of Contents for 46F Series
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