Can underground propane tanks rust over time?

Corrosion Risks

Underground propane tanks are susceptible to corrosion, particularly if not properly coated or protected. A common issue is the accumulation of condensation within the tank, which can lead to rust formation. This can occur even if the tank is installed in dry soil, as moisture can seep in through the soil or tank seals. It’s essential to ensure the tank is coated with a suitable protective layer, typically a 1/8-inch thick epoxy-based coating, to minimize the risk of corrosion.

Soil Conditions and Tank Installation

Soil conditions play a significant role in the longevity of underground propane tanks. Soil with high acidity or moisture levels can accelerate corrosion. When installing a tank, it’s crucial to follow the manufacturer’s guidelines and recommendations for the soil type and tank depth. A general rule of thumb is to bury the tank 12 inches below grade, with the bottom 6 inches below the frost line. This helps protect the tank from soil erosion and water infiltration.

Inspection and Maintenance

Regular inspections are vital to detecting potential issues with underground propane tanks. Look for signs of rust, corrosion, or moisture accumulation around the tank, vents, and connections. It’s recommended to inspect the tank every 5-7 years, or as specified by the manufacturer. During inspections, check the tank’s coating and ensure it’s not damaged. If rust or corrosion is detected, it’s essential to address the issue promptly to prevent further damage and potential safety risks.