API Table Information
This section includes information on the constants used by the software to calculate the
volume correction factors and valid ranges for the API (density) and temperature data.
* For the transition group, A(T) = [ K1 + K0 / ( DEN (T) x DEN (T)) ]
* * TEC is the thermal expansion coefficient of the product being measured.
NOTE
Volumetric modes 6C MOD and CUST TAB are not
intended for custody transfer applications since they
do not follow API standard 2540 exactly. The soft-
ware for 6C MOD incorporates a moveable tempera-
ture reference and allows for a wider range of TEC
values.
0 to +300.0 deg F
100.0 to 999.0 * 10E-6/deg F
Valid temperature ranges
Valid TEC ranges
Special products using TEC (Table 6C MOD)
Valid temperature ranges Valid TEC ranges
0 to +300.0 deg F
0 to +250.0 deg F
0 to +200.0 deg F
270.0 to 510.0 * 10E-6/deg F
510.5 to 530.0 * 10E-6/deg F
530.5 to 930.0 * 10E-6/deg F
Special products using TEC** (Table 6C)
Product type Constants Gravity range (API)
Fuel oil
K0 = 103.8720
K1 = 0.2701
0.0 to 37.0
Jet Group
K0 = 330.3010
K1 = 0.0
37.1 to 47.9
Transition
Group *
K0 = 1489.0670
K1 = -0.0018684
48.0 to 52.0
Gasolines
K0 = 192.4571
K1 = 0.2438
52.1 to 85.0
Generalized products (Table 6B)
Valid temperature ranges Valid gravity ranges (API)
0 to +300.0 deg F
0 to +250.0 deg F
0 to +200.0 deg F
0.0 to 40.0 deg API
40.1 to 50.0 deg API
50.1 to 85.0 deg API
Valid temperature ranges
Valid gravity ranges (API)
0 to +300.0 deg F
0 to +250.0 deg F
0 to +200.0 deg F
0.0 to 40.0 deg API
40.1 to 50.0 deg API
50.1 to 100.0 deg API
Crude oils (Table 6A)
Constants: K0 = 341.0957
K1 = 0.0
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