Tank materials and construction
We build tanks in welded steel, fibreglass (FRP) and both together, with one wall or two. These guides explain how each is built and when to choose it.
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Tank materials
Steel
Single welded steel wall
Welded steel tanks for above-ground fuel storage. Single wall in a concrete bund, or self-bunded with the bund built in.
Read the guideFibreglass (FRP)
Fibreglass reinforced plastic wall
Lightweight, rust-proof fibreglass tanks for underground fuel, chemical storage and water.
Read the guideGlasteel® II
FRP outer wall, vacuum-monitored gap, steel inner tank
A welded steel tank inside an FRP outer wall. The steel carries the load and the FRP keeps it out of the ground, with no cathodic protection.
Read the guideFireguard® 4-hour
Steel outer tank, insulation, steel inner tank
Double-wall steel with thermal insulation between the inner and outer tanks, rated to the SwRI 4-hour fire test.
Read the guideDouble wall
Outer tank, interstitial space, inner tank
A tank inside a tank. The outer wall contains a leak from the inner wall, and the space between them can be monitored.
Read the guideTruchek® monitoring
FRP outer wall, brine-filled gap, FRP inner wall
Hydrostatic leak monitoring for double-wall FRP tanks. The space between the walls is filled with brine, and a reservoir on top of the tank holds it at a set level.
Read the guideFuel tanks by construction
Capacities and standards as published on each product page. “On request” means the size is set for each project.
| Tank | Location | Walls | Containment and monitoring | Capacity |
|---|---|---|---|---|
| Single-wall steel | Above ground | One, welded steel | Sits in a concrete bund | 2,000–150,000L |
| Self-bunded steel | Above ground | Two, welded steel | Integral wrap bund, no concrete bund to build | 2,000–200,000L, up to 110,000L diesel |
| Fireguard® 4-hour | Above ground | Two, steel with insulation between | Rated to the SwRI 4-hour fire test | On request |
| Flameshield® 2-hour | Above ground | Two, steel | Interstitial monitoring, 2-hour fire test | On request |
| Single-wall fibreglass | Underground | One, FRP | Single wall | On request |
| Double-wall fibreglass | Underground | Two, FRP | 360-degree secondary containment, Truchek® hydrostatic monitoring | 2,000–150,000L |
| Glasteel® II | Underground | Two, steel inner and FRP outer | FRP outer wall contains the steel tank, factory-fitted vacuum gauge | 2,000–200,000L |
Fibreglass is also our material for chemical storage tanks through GRP Tank Solutions, and for water and wastewater tanks through Mullaly Tank Solutions. Not sure which suits your site? Our plain-English AS 1940 guide explains the fuel storage rules.