ULLAGE MEASUREMENTS
Independent Ullage Measurements of Liquid Cargoes
Ullage measurements are carried out to determine the quantity of liquid cargo in vessel tanks or shore storage tanks. The survey may cover edible oils, petroleum products.
The surveyor measures the ullage, cargo temperature and free water, where present. The measurements are converted into cargo volumes using approved tank calibration tables. Density and temperature correction factors are then applied where required to calculate the final cargo quantity.
WHEN REQUIRED
Independent ullage measurements are normally required before and after loading or discharge, during cargo transfer, or whenever an independent verification of liquid cargo quantity is needed.
The survey helps owners, charterers, terminals, shippers and receivers confirm cargo quantities and reduce the risk of quantity disputes.
SERVICE INCLUDES
- Ullage measurements of vessel cargo tanks
- Ullage measurements of shore storage tanks
- Measurement of cargo temperature at the required levels
- Measurement of free water, where present
- Verification of cargo segregation, where applicable
- Use of approved vessel or shore tank calibration tables
- Application of density and temperature corrections
- Calculation of cargo volumes and quantities
- Photographic documentation, where required
- Preparation of ullage reports
REPORTING
After completion of the survey, the client receives an ullage report or certificate showing the tank measurements, cargo temperatures, applied corrections and calculated cargo quantities.