Terminal · Storage
Tank Gauging
Radar or servo gauges on the tank roof that measure level, with temperature, to know how much product is in every tank. A separate high level alarm guards against overfill.
What it does
Automatic tank gauging feeds inventory, receipts and deliveries to the control room. For overfill prevention, API 2350 sets minimum requirements for atmospheric tanks at terminals, including a management system, risk assessment and the overfill prevention equipment, which works independently of the inventory gauge.
Basics
| Level | Radar, guided wave radar or servo gauge |
| Also reads | Product temperature for volume correction |
| Overfill | Independent high high level alarm or shutdown |
| Standard | API 2350 for terminal atmospheric tanks |
Common failures
- Gauge reading stuck while the tank keeps filling, the classic path to an overfill
Troubleshooting
- Symptom
- Level does not change during a receipt
- Likely cause
- Stuck gauge or lost signal
- What to check
- Confirm with a manual gauge and stop the receipt until the reading is trusted