Design Principles of Double Wall Fuel Tanks
The double wall fuel tank design provides redundant protection through concentric barriers, combining proactive leak prevention with responsive detection systems to meet stringent safety and environmental standards.
Core Structure
- Concentric wall design with inner fuel container and outer protective shell
- Interstitial space (typically 2-15cm) serving as secondary containment
- Integrated leak detection systems (sensors/visual ports) in the gap space
Material Selection
- Inner wall: Corrosion-resistant materials (epoxy-coated steel, HDPE)
- Outer wall: Structural materials (thick steel, reinforced plastic) for impact/UV resistance
- Material combinations optimized for both chemical compatibility and physical durability
Above-Ground Features
- Weatherproofing/insulation layers
- UV-resistant outer coatings
- Impact-resistant construction
Underground Features
- Soil pressure reinforcement
- Enhanced corrosion protection
- Waterproof outer barriers
Functional Components
- Precisely positioned fittings and ports that maintain wall integrity
- Dual-protected fuel inlet/outlet systems
- Protected ventilation and monitoring access points
- Compliant spill containment provisions
The double wall design philosophy achieves optimal protection through material science, structural engineering, and systems integration—creating tanks that simultaneously prevent leaks, contain failures, and enable early detection while meeting all regulatory requirements.