Man L23/30DF, Project Manual

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Specification of diesel oil (MDO)
Marine diesel oil
Marine diesel oil, marine diesel fuel.
Marine diesel oil (MDO) is supplied as heavy distillate (designation ISO-F-
DMB) exclusively for marine applications. MDO is manufactured from crude
oil and must be free of organic acids and non-mineral oil products.
Specification
The suitability of a fuel depends on the engine design and the available
cleaning options as well as compliance with the properties in the following
table that refer to the as-delivered condition of the fuel.
The properties are essentially defined using the ISO 8217 standard in the
current version as the basis. The properties have been specified using the
stated test procedures.
Properties Unit Test procedure Designation
ISO-F specification – – DMB
Density at 15 °C kg/m
3
ISO 3675 < 900
Kinematic viscosity at 40 °C mm 2 /s
≙
cSt ISO 3104 > 2.0
< 11 1)
Pour point, winter grade °C ISO 3016 < 0
Pour point, summer grade °C ISO 3016 < 6
Flash point (Pensky Martens) °C ISO 2719 > 60
Total sediment content weight % ISO CD 10307 0.10
Water content Vol. % ISO 3733 < 0.3
Sulphur content weight % ISO 8754 < 2.0
Ash content weight % ISO 6245 < 0.01
Coke residue (MCR) weight % ISO CD 10370 < 0.30
Cetane index and cetane number - ISO 4264
ISO 5165
> 35
Hydrogen sulphide mg/kg IP 570 < 2
Acid number mg KOH/g ASTM D664 < 0.5
Oxidation stability g/m 3 ISO 12205 < 25
Lubricity
(wear scar diameter)
μm ISO 12156-1 < 520
Other specifications:
ASTM D 975 – – 2D
ASTM D 396 – – No. 2
Table 1: Table: Properties of Maritime Diesel Oil (MDO) to be Maintained
1)
For engines 27/38 with 350 resp. 365 kW/cyl the viscosity must not
exceed 6 mm
2
/s @ 40 °C, as this would reduce the lifetime of the injection
system.
Other designations
Origin
2017-07-11 - de
Specification of diesel oil (MDO)
D010.000.023-04-0001
General
MAN Diesel & Turbo
010.000.023-04
D010.000.023-04-0001 EN 1 (2)