Double Wall Fuel Tanks
Double-wall diesel tanks with built-in secondary containment for sites requiring the highest spill protection.
A double-wall tank builds the secondary containment into the tank itself, with an interstitial space between the inner and outer shell that's monitored for leaks. It's the highest level of spill protection available in a self-contained tank, suited to sites where a bunded above-ground enclosure isn't practical or where code specifically calls for double-wall construction.
- Integrated inner and outer wall containment
- Interstitial leak monitoring available on request
- Meets stricter environmental and safety requirements
- Ideal for sensitive or regulated project sites
Self-Contained Protection, Above Or Below Ground
Double-wall tanks fabricate the secondary containment directly into the shell, available across a full range of capacities for both above-ground and buried installations.
How We Build Double-Wall Tanks
Double-wall construction only delivers the protection it promises if both shells are built and tested to the same standard — not just the outer one.
Inner And Outer Wall Fabricated To Equal Spec
Both shells are welded and tested to the same standard, since the inner wall carries the fuel and the outer wall is the only barrier if it fails.
Interstitial Space Built For Leak Detection
The gap between the two shells is designed to allow leak monitoring, so a failure of the inner wall is detected before fuel reaches the environment.
Both Shells Pressure And Leak Tested
Each shell is tested independently before the tank leaves the workshop, confirming both the primary containment and the backup.
Built For Above-Ground Or Buried Installation
The same double-wall construction can be finished and installed either above ground or buried, depending on your site's layout and code requirement.