Composite Double-Wall Underground Fuel Tank

Product Overview: S/F Double-Wall Underground Storage Tank

Constructed with a steel inner tank for primary containment and structural integrity, wrapped in a corrosion-resistant FRP (fiberglass-reinforced plastic) outer jacket for secondary containment. The interstitial monitoring space enables real-time leak detection between the two walls. Available in capacities from 1,000L to 100,000L, horizontal cylindrical configuration, single or multi-compartment design. Compatible with diesel, gasoline, kerosene, jet fuel, and ethanol/biodiesel blends. Designed and tested to UL 58 and UL 1746 standards, with a service life significantly longer than conventional single-wall tanks — typically rated for 30–50 years under proper operating conditions.

Key Features

- Dual-Layer Protection: Tank-within-a-tank structure providing a double barrier; prevents oil leakage and groundwater seepage.

- Leakage Early Warning: 24-hour real-time leak detection with automatic alarms for anomalies.

- High Corrosion Resistance: Outer fiberglass layer resists soil, acid, and alkali corrosion; inner steel layer is compatible with stored petroleum products.

- Safety and Explosion Protection: Excellent tank sealing, flame-retardant, and insulating properties; reduces the risk of fire and explosion.

- Underground Suitability: Specifically designed for underground burial; compatible with various soil types and complex, damp site conditions.