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.

UllageGaugingASTM

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

U_{15} = \frac{U_{obs}}{\text{VCF}(\rho_{15}, T_{obs})}

Symbol	Meaning	Unit
$U_{obs}$	Observed ullage	m
$\rho_{15}$	Density at 15 °C	kg/m³
$T_{obs}$	Observed temperature	°C

Source: ASTM D1250-19

In short

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.

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