What is a double walled fuel tank?

A double-walled fuel tank – though often thought of as a bunded fuel tank, is simply a fuel tank with the added benefit of having a double layer of wall protection. Unless the space between the first and second wall can hold at least 110% of the inner tank’s capacity, a double-walled tank cannot be classed as bunded, and so, falls under many of the same restrictions a single skin tank would be subject to.

It is highly recommended that those looking for a tank with a safe containment method or extra protection choose a bunded tank over a double-walled tank. Bunded tanks offer easier maintenance, are more compliant with current regulations, and offer more effective protection against spills.