C199 – ASTM-IP Table 23:1952 – Specific Gravity Reduction to 60°F
Description
This calculates the specific gravity 60/60°F from an observed specific gravity and corresponding temperature. Note that this calculation is only valid for the portion of Table 23 with specific gravity inputs of 0.600 and above.
References
Report on the Development, Construction, Calculation and Preparation of the ASTM-IP Petroleum Measurement Tables – ASTM D 1250; IP 200 (1960)
ASTM-IP Petroleum Measurement Tables – ASTM D 1250; IP 200 (1952)
Kelton calculation reference C199
FLOCALC calculation reference F085
Options
Precision
- Full
- Rounding
This option is used to choose whether to apply rounding to the same number of significant figures as the printed values in Petroleum Measurement Table 5 or output values with full precision.
Hydrometer correction
- Apply
This option is chosen to apply the hydrometer correction described below.
Calculation
Hydrometer Correction
The hydrometer correction is calculated by:
| Where | ||
|---|---|---|
| ΔT | = | Difference in temperature compared to base temperature in °F |
Specific Gravity 60/60°F
The specific gravity 60/60°F is calculated by an iterative process based around the relationship:
| Where | ||
|---|---|---|
| ΔT | = | Difference in temperature compared to base temperature in °F |
| SGT/60°F | = | specific gravity at observed temperature |
| a1 | = | Constant from Table III |
| a2 | = | Constant from Table III |
| b1 | = | Constant from Table III |
| b2 | = | Constant from Table III |