Introduction
Storage tanks are designed with extra space above the liquid level to ensure safe operation.
Short Answer
Tank free space is the empty volume above the liquid level inside a storage tank.
Explanation
The empty space in a tank allows for thermal expansion of the liquid and vapor accumulation.
If a tank were filled completely, temperature changes could cause the liquid to expand and create dangerous pressure inside the tank.
Free space also allows for vapor separation and helps prevent overfilling.
Engineering Practice
Engineers calculate tank free space based on tank capacity, liquid expansion characteristics, and safety requirements.
Proper free space design improves operational safety.
Conclusion
Tank free space is an important design factor for safe storage tank operation.
