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Fuels
HFO quality
Ningbo ZC diesel engines are designed for reliable operation on heavy fuel oil.
For guidance on purchase, reference is made to ISO 8217, BS6843 and to CIMAC recommendations regarding requirements for heavy fuel for diesel engines, edition 2001. From these, the maximum accepted grades are RMH 35 and K35.
For reference purposes, an extract from the relevant standards and specifications is shown in Table 1.
|
Designation
|
|
|
CIMAC
D 15 |
CIMAC
H 35 |
|
Related to ISO 8217 (96): F |
|
|
RMD 15 |
RMH 35 |
|
Characteristic |
Dim. |
Limit |
|
|
|
Density at 15 �?/DIV> |
kg/m3 |
max. |
980 |
991 |
|
Kinematic viscosity at 100 �?1) |
cSt 2) |
max. |
15 |
35 |
|
Flash point |
�?/DIV> |
min. |
60 |
60 |
|
Pour point |
min. |
max. |
30 |
30 |
|
Carbon residue |
%(m/m) |
max. |
14 |
18 |
|
Ash |
%(m/m) |
max. |
0.10 |
0.15 |
|
Total sediment after ageing |
%(m/m) |
max. |
0.10 |
0.10 |
|
Water |
%(v/v) |
max. |
0.80 |
1.0 |
|
Sulphur |
%(m/m) |
max. |
2 |
3 |
|
Vanadium |
mg/kg |
max. |
350 |
600 |
|
Aluminum and silicon |
mg/kg |
max. |
80 |
80 |
Table 1: Residual marine fuel standards
1) Approximate equivalent viscosities (for information only):
Kinematic viscosity (cSt) at 100�? 10 15 25 35 45 55
Kinematic viscosity (cSt) at 50�?2 40 80 180 380 500 700
Sec. Redwood I at 100 F 165 300 600 1500 3500 5000 7000
In Africa, it is recommended to use 180Cst/50 Heavy Fuel Oil.
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