Self-Bunded Fuel Tank Operational Design
Dual-Containment System
A self-bunded fuel tank operates through a sophisticated integration of structural design and functional components, ensuring safe, efficient fuel storage and preventing leaks. Its core functionality revolves around a double-walled system that combines primary containment with built-in secondary protection.
Primary Containment Vessel
The inner tank, typically made from high-grade steel or reinforced polymer, serves as the primary vessel for holding fuel. It is engineered to withstand internal pressure from fuel expansion (due to temperature changes) and resist corrosion from prolonged fuel contact.
Welded seams and sealed fittings (like fill ports, outlet valves, and inspection hatches) minimize the risk of primary leaks.
Key Technical Specifications
- Double-walled construction with secondary containment
- 110% capacity bund for complete leak capture
- High-grade steel or reinforced polymer materials
- Corrosion-resistant coatings for durability
- Pressure relief valves for vapor management
- Automatic shutoff systems for overfill prevention
- Leak detection sensors in bund gap
- Remote monitoring capabilities for fuel levels
- Thermal insulation between walls
- Reinforced structural base for stability
- Anti-slip surfaces for safety
- Compliance with industry standards
Secondary Containment System
Surrounding the inner tank is the outer "bund"—a secondary wall that forms a sealed, leak-proof compartment. This outer layer is designed to contain 110% of the inner tank's capacity, acting as a failsafe if fuel escapes the inner tank due to damage, rust, or seal failure.
The gap between the walls also provides insulation, reducing condensation and thermal stress that could compromise the inner tank.
Pressure Management
Pressure relief valves regulate internal pressure, releasing excess vapor to prevent over-pressurization (critical for volatile fuels)
Overfill Protection
Float switches or automatic shutoffs halt fuel delivery when the tank reaches capacity
Leak Detection
Sensors in the bund gap trigger alarms if fuel or moisture is detected
Fuel Monitoring
Integrated level gauges track fuel volume for efficient inventory management