Inner Layer Wear in Double Wall Fuel Tanks
While double wall fuel tanks are designed for durability, the inner layer can wear over time depending on material quality, fuel composition, and maintenance practices.
Primary Causes of Wear
- Fuel additives that gradually degrade materials (especially in lower-grade plastics or uncoated steel)
- Abrasive particles in diesel/biodiesel that erode the inner surface
- Corrosion from moisture buildup (condensation or water-contaminated fuel)
- Chemical reactions with aggressive fuels causing micro-cracks in plastic tanks
Warning Signs
- Fuel leaks detected through the interstitial monitoring system
- Unusual sediment appearing in fuel filters
- Visible pitting or degradation during inspections
Material Considerations
- HDPE plastic tanks resist chemical degradation better than standard plastics
- Epoxy-coated steel provides superior corrosion resistance
- Quality materials can last 15-30 years with proper maintenance
Pro Tip: The wear rate varies significantly - tanks storing clean gasoline in climate-controlled environments degrade much slower than those storing biodiesel in outdoor, fluctuating temperatures.
Prevention Strategies
- Regular visual inspections and monitoring system checks
- Proper fuel filtration to remove abrasive particles
- Avoiding prolonged storage of contaminated fuel
- Maintaining stable temperature conditions when possible
While inner layer wear is inevitable over decades of use, selecting quality materials and implementing proper maintenance practices can dramatically extend the service life of double wall fuel tanks.