Ullage - Thermal Expansion Correction
Correct observed ullage reading for cargo-to-tank temperature difference using ASTM D1250 volume-correction factor - the fundamental step in ship-to-shore ullage reconciliation.
α₆₀ thermal expansion
0.0008301/°C
VCF (54B)
0.9892 -
Equivalent 15 °C ullage
1.264m
Formula, assumptions, and limits
Uses Table 54B coefficient for generic products. For crude oil use 54A, lube oils 54D, LPG use 53E/54E (different method).
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Observed ullage | m | UTI tape | |
| Density at 15 °C | kg/m³ | density meter | |
| Observed temperature | °C | portable PT100 |