TANK GAUGING

Tank Gauging converts between level, volume and mass for a storage vessel from its geometry and the fluid’s density at operating conditions, and plans a transfer between two dips.

Capabilities

• Vertical and horizontal cylinders, with flat, hemispherical or 2:1 elliptical heads, and spheres.
• Starting and Final Dip, each solvable from level, volume or mass, with the transferred quantity reported — including working back from a target mass to ship.
• Hydrostatic head at each dip.
• Maximum safe fill by level, volume and mass.
• Operating conditions fixed by temperature, pressure, both, or open to atmosphere, with a warning where the liquid would exceed its bubble point.
• Stored temperature compared with a typical minimum design metal temperature for the selected construction grade.
• Vessel geometry saved as presets, shared with Blowdown.
• Exportable PDF report.

Why the results hold up

The capacity integral is solved directly for the selected shape and head type. For hydrocarbon streams, liquid and vapour densities at the stated conditions come from the Peng-Robinson equation of state, so a level converts to mass at actual conditions; water uses the Kell (1975) density correlation. Phase equilibrium is solved for the chosen operating basis, so the liquid state the inventory assumes is confirmed rather than taken for granted.

Scope

A geometric calculation from idealised shapes, not a certified strapping table: plate deformation, out-of-roundness, tilt and internals are not represented. It must not be used for custody transfer, fiscal metering or billing, which require certified tables. The MDMT comparison is an informational margin, not a fitness-for-service assessment; see the Software & Engineering Disclaimer for the suite-wide statement on safety-critical use.