Wartsila ?31DF Series, Руководство по эксплуатации продукта

Страница: 90 / 216

6.1.2.3 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).
HFO is accepted only for back-up fuel system. Use of HFO as pilot fuel is not allowed, but a
fuel quality fulfilling the MDF specification included in section
Light fuel oil operation (distillate)
has to be used.
Table 6-3 Heavy fuel oils
Test method reference
Limit
HFO 2
Limit
HFO 1
Unit Characteristics
- 20 ± 4 20 ± 4
mm 2 /s b)
Kinematic viscosity before main injection
pumps
d)
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, but max.
4,50 % m/m
% 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.
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.
IP 501, IP 470 or ISO
10478
15 15 mg/kg
Alu Silicon before engine, max.
d)
6-6 DBAE248994
Wärtsilä 31DF Product Guide 6. Fuel Oil System