7828 Density Transmitter Technical Manual Reference Data
78285000_AA E-5
Refined Products
Temp.
(°C)
Density (kg/m
3
)
60
605.51 657.32 708.88 766.17 817.90 868.47 918.99 969.45 1019.87
55
610.59 662.12 713.50 769.97 821.49 872.00 922.46 972.87 1023.24
50
615.51 666.91 718.11 773.75 825.08 875.53 925.92 976.28 1026.60
45
620.49 671.68 722.71 777.53 828.67 879.04 929.38 979.69 1029.96
40
625.45 676.44 727.29 781.30 832.24 882.56 932.84 983.09 1033.32
35
630.40 681.18 731.86 785.86 835.81 886.06 938.28 986.48 1038.67
30
635.33 685.92 736.42 788.81 839.37 889.56 939.72 989.87 1040.01
25
640.24 690.63 740.96 792.55 842.92 893.04 943.16 993.26 1043.35
20
645.13 695.32 745.49 796.28 846.46 896.53 846.58 996.63 1046.68
15.556
649.46 699.48 749.50 799.59 849.61 899.61 949.62 999.63 1049.63
15
650.00 700.00 750.00 800.00 850.00 900.00 950.00 1000.00 1050.00
10
654.85 704.66 754.50 803.71 853.53 903.47 953.41 1003.36 1053.32
5
659.67 709.30 758.97 807.41 857.04 906.92 956.81 1006.72 1056.63
0
664.47 713.92 763.44 811.10 860.55 910.37 960.20 1010.07 1059.93
The above tables are derived from equations which form the basis of the data in the
Revised Petroleum Measurement Tables (IP 200, ASTM D1250, API 2540 and ISO R91
Addendum 1).
The density temperature relationship used is:
()
[]
ρρ α α
ttt
=−+
15 15 15
108exp .∆∆
where:
ρ
t
= Density at line temperature t°C (kg/m
3
)
ρ
15
= Density at base temperature 15°C (kg/m
3
)
∆
t
= ( t -15 )°C (i.e., t - base temperature)
α
15
= Tangent thermal expansion coefficient per °C at base temperature 15°C
The tangent thermal expansion coefficient differs for each of the major groups of
hydrocarbons. It is obtained using the following relationship:
α
ρ
ρ
15
0115
15
2
=
+KK
where K
0
and K
1
are the API factors and are defined below:
Product
Density Range (kg/m
3
)
K
0
K
1
Crude Oil
771 - 981 613.97226 0.00000
Gasolines
654 - 779 346.42278 0.43884
Kerosines
779 - 839 594.54180 0.00000
Fuel Oils
839 - 1075 186.96960 0.48618
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