MAN B&W 5L28/32H, Manual

Page: 71 / 218

08028-0D\H5250\94.08.12
1609529-6.3
Page 3 (3)
Fuel Oil Specification B 11 00 0
99.33
This chart is based on information from oil suppliers regarding typical marine fuels with viscosity index 70-80.
Since the viscosity after the preheater is the controlling parameter, the preheating temperature may vary,
dependent on the viscosity and viscosity index of the fuel.
Fuel oil - preheating chart
General
Normal preheating limit
Approx. pumping limit
10 15 25 35 45 55 cSt/100° C
30 60 100 180 380 700 cSt/50° C
200 400 800 1500 3500 7000 sec. Rw/100° F
Viscosity of fuel
Log scales
Approx. viscosity
after preheater
Temperature
after preheater °C
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
sec.
Rw.
cSt
7 43
10 52
12 59
20 87
15 69
30 125