Tankerman · Gauging — Ullage
A UTI (ullage-temperature-interface) tape is used to measure ullage, temperature, and:
- AOxygen content
- BVapor pressure
- CThe oil/water interface level in the tank✓ Correct
- DSulfur content
Explanation
A UTI tape gives ullage (empty distance to the surface), cargo temperature, and detects the oil/water interface so free water at the tank bottom can be measured and accounted for in volume calculations.
Authority: ISGOTT; ASTM gauging practice
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