Can underground tanks explode under certain conditions?

Explosive Conditions

Propane tanks, including underground ones, can be a fire hazard if not installed, maintained, or used properly. Leaks or ruptures can cause propane to seep into the surrounding soil or accumulate in an enclosed space, such as a basement or crawl space. This can lead to the buildup of a highly flammable gas mixture, which can ignite if a spark or flame is present. Underground propane tanks should be installed at least 10 feet away from any building or combustible materials, and the soil surrounding the tank should be carefully excavated to prevent damage to the tank or its connections.

Tank Damage and Explosions

If an underground propane tank is damaged, either through a leak or physical impact, it can rupture and release propane into the surrounding soil or air. This can lead to an explosion or fire, especially if the propane mixes with air in a confined space. To prevent this, underground propane tanks should be protected from physical damage by a minimum of 6 inches of concrete or rock, and the soil surrounding the tank should be carefully compacted to prevent settling or shifting. Additionally, propane tanks should be inspected regularly for signs of damage or leaks.

Preventing Explosions

To prevent explosions or fires associated with underground propane tanks, it’s essential to follow proper installation, maintenance, and usage procedures. This includes installing the tank at the correct depth, using the correct type and amount of backfill material, and ensuring that the tank is protected from physical damage. Regular inspections should be performed to detect any signs of damage or leaks, and the tank should be replaced if it shows signs of wear or deterioration. Proper ventilation and safety equipment, such as a propane detector, can also help prevent explosions or fires.