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41
TEMPERATURE COMPENSATION METHOD - DENSITY RATIOS FOR LIQUID PETROLEUM
PRODUCTS
1
Acceptable temperature compensation range: -40°C to +70°C. Temperature compensated volume changes
for specific products are determined using the formula:
V
o
= V
t
(
t
/
o
)
where: V
t
= uncompensated gross volume
V
o
= calculated temperature compensated volume
t
/
o
= ratio of density at measured temperature to density at base temperature
The ratio of density is calculated after inserting the appropriate constants into the equation below:
t
/
o
= e
-
Where: = -
o
(t - 15) [1 +
o
(0.8) (t - 15)]
t = measured temperature
o
= K
0
/
o
2
+ K
1
/
o
or
o
= A + B /
o
2
Notes:
The ratio of density is equation 4.16 from page 9 of the PTB-A 5 Measuring Systems for Liquids other than
Water - June 1999 edition.
Setting factor pairs used to calculate
o
above (K
0
and K
1
or A and B) are taken from Table 4.2 on page 10 of
the PTB-A 5 Measuring Systems for Liquids other than Water - June 1999 edition.
Table 4 - Minimum & Maximum Product Densities at 15°C
1
Product
Min. Density
(kg/m
3
)
Max. Density
(kg/m
3
)
EMR4
Default Density
(kg/m
3
)
Canadian
Default Density
(kg/m
3
)
API
OIML R63
Table
Gasoline 600.0 770.0 737.0 730.0 54B
Diesel 838.6 1200.0 849.0 840.0 54B
Jet A 760.0 860.0 820.0 800.0 54B
Aviation Gas 600.0 770.0 704.0 710.0 54B
Fuel Oil 838.6 1200.0 849.0 840.0 54B
Crude Oils 610.5 1075.0 940.0 940.0 53A
Lubricating Oils 750.0 1164.0 887.0 880.0 54D
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