Can heavy rain affect the stability of a buried propane tank?

Hydrostatic Pressure Considerations

When heavy rainfall occurs, water can accumulate around the buried propane tank, creating hydrostatic pressure. This pressure can be substantial, with estimates suggesting up to 42 pounds per square inch (psi) of pressure for every 10-foot depth of water. For a 1,000-gallon propane tank buried 10 feet underground, this translates to approximately 4,200 psi of pressure.

Potential Consequences of Hydrostatic Pressure

Prolonged exposure to such high pressures can cause the tank’s walls to buckle or collapse, leading to a catastrophic failure. Additionally, the pressure can also cause the tank’s concrete or metal reinforcement to shift or crack, compromising the tank’s structural integrity. In extreme cases, the pressure can even cause the tank to float to the surface, potentially resulting in a hazardous situation.

Design and Installation Considerations

To mitigate the effects of hydrostatic pressure on a buried propane tank, it is essential to design and install the tank with these considerations in mind. This includes ensuring the tank is buried at a sufficient depth (typically 12-18 inches) and that the surrounding soil is compacted and well-drained. It is also crucial to select a tank specifically designed for underground use, with features such as a reinforced base and a secure lid. Regular inspections and maintenance are also vital to ensure the tank remains safe and secure.