The Plasteel^® Single Wall Composite Tank

The Plasteel^® Single Wall Composite Tank is UL Listed and Tested per UL Standards 58 and 1746, Part II. In 1980, the Plasteel^® Single Wall Composite Tank was the first tank to achieve the UL Listing for a Composite Tank.

The inner primary steel tank is assembled, welded and tested per UL Standard 58. The primary steel tank provides the underground structural performance for the Plasteel® Single Wall Composite Tank.

The Plasteel^® Single Wall Composite Tank has been UL performance tested per the optional UL Standard 58, External Pressure Test (EPT), Paragraph 18. The EPT requires no structural deformation when an empty steel primary tank is submerged with five feet (1.53m) of water over the top of the tank without backfill materials.

The Plasteel^® exterior bonded fiberglass reinforced plastic (FRP) laminate encapsulates the steel primary tank providing a UL Listed and Tested exterior corrosion protection system for the Composite Tank.

The first Plasteel^® single wall underground tank was installed in 1971.

There has never been a documented external corrosion failure of any Plasteel^® tank.