What are advantages of a double-walled propane tank?

Reduced Risk of Leaks and Damage

A double-walled propane tank consists of an inner tank with a small gap between it and the outer tank. This gap, called a void space, acts as a buffer, preventing the inner tank from coming into contact with the outer tank in the event of a leak or damage. The inner tank can be made of a more expensive but safer material, such as high-density polyethylene (HDPE), while the outer tank is typically made of a less expensive steel or fiberglass material. This design reduces the risk of propane escaping into the environment and prevents fires. For example, a double-walled propane tank with a 5-mil HDPE inner liner and a 10-gauge steel outer tank can withstand the rigors of underground installation and harsh environmental conditions.

Easier Leak Detection and Inspection

The void space in a double-walled propane tank makes it easier to detect leaks and inspect the interior of the tank. If a leak occurs, propane will accumulate in the void space, making it easier to detect and repair the leak before it becomes a major issue. Regular inspections of the tank can also be performed without the need for expensive equipment or specialized training. For instance, a technician can use a specialized tool to pressurize the void space and check for leaks, making it a more efficient and cost-effective process.

Compliance with Regulations

Double-walled propane tanks often meet or exceed regulatory requirements for underground storage tanks (USTs). For example, the United States Environmental Protection Agency (EPA) requires USTs to be designed and installed to prevent leaks and ensure safe operation. Double-walled tanks meet these requirements by providing an additional layer of protection against leaks and damage. This compliance also reduces the risk of fines and penalties associated with non-compliance, making it a cost-effective solution for propane storage and distribution.