A Greer UL-142 double wall tank is engineered and fabricated to meet UL 142 requirements for aboveground steel fuel storage. Each tank is built for primary and secondary containment, manufactured in the USA, and backed by a one-year limited warranty. For extended service life and long-term compliance assurance, Greer also offers STI F921® double wall tanks with a 30-year warranty.
These UL-142 aboveground storage tanks are suitable for a wide range of flammable and combustible fuels, including diesel, gasoline, and heating oil, across commercial, industrial, and municipal applications.
Standard and project-specific customizations are available. See the Customizations tab below for ladders, platforms, supports, coatings, manways, pump systems, alarms, and containment options.
UL 142 Double Wall Tank Product Details
Standard Features
- A UL 142 double wall tank is equipped with 3”, 4”, 6”, 8” or 10” Emergency Vent opening for primary tank. (sized per UL requirements). Sizes dependent on project specifications.
- Openings are female national pipe thread (FPNT).
- Tanks larger than 76” in diameter are supplied with 18” manholes per UL-142 specifications.
- Tanks are designed for stationary use and require a support structure. Call for details.
- The exterior paint is red oxide primer. The interior is unpainted.
Optional Features
- Also available in rectangle design
- Cradle and Skid mounting
- OSHA ladders and catwalks
- Custom coatings (interior and exterior)
Above Ground UL 142 Double Wall Tank Sizes
| Gallons | GA | DIA | Length | Height | Weight | On Cradle Weight | On Skid Weight |
|---|---|---|---|---|---|---|---|
| 300 | 12 | 38" | 73" | 40" | 553# | 621# | 855# |
| 500 | 12 | 46" | 84" | 48" | 715# | 865# | 1,080# |
| 1000 | 10 | 64" | 84" | 66 | 1,478# | 1,679# | 2,154# |
| 1000 LP** | 10 | 46" | 156" | 52" | 1,730# | 1,816# | 2,232# |
| 1500 | 3/16" | 64" | 120" | 66" | 2,849# | 3,045# | 3,645# |
| 2500 | 3/16" | 76" | 144" | 78" | 3,550# | 4,540# | 5,340# |
| 3000 | 3/16" | 76" | 168" | 78" | 4,560# | 5,060# | 5,940# |
| 5000 | 3/16" | 96" | 180" | 98" | 8,680# | 9,720# | 11,400# |
* Tanks are also available as non-UL
** LP – indicates “Low Profile”
UL 142 Specifications
UL 142 includes requirements that manufacturers use to design and fabricate aboveground steel tanks, and that certification organizations such as UL use to investigate and List (certify) these tanks. The standard includes a comprehensive set of requirements in the following areas:
• Construction requirements – These include specification for the tank materials, joints, connections, fittings, manholes (if provided), fill, drain and gauge openings, and painting. They also include specific construction requirements for the primary and secondary containment means, supports, etc.
• Performance tests – These requirements include tank leakage, hydrostatic strength, top loading, buoyancy, hydrostatic load, tank support load, and lift lug tests that are designed to verify that the tank design does not exhibit signs of leakage and/or structural damage as a result of these tests.
• Markings and production line test – UL 142 requires tanks to include a specific UL Listing Mark permanently affixed to the tank. The Listing Mark includes the UL symbol, the word “LISTED,” a control number and the name of the tank construction as indicated in the manufacturer’s Listings (e.g. Secondary Containment Aboveground Tank, Generator Base Tank, etc.) In addition, 100% of the production of each Listed primary and secondary containment tank must be tested for leakage by the manufacturer.
Ladders, Stairs, Platforms, Catwalks
Internal and external ladders, stairs, platforms and catwalks are designed to comply with strict OSHA guidelines.
Tank Supports
Greer’s tank supports are designed to keep the tank stationary and also to support and elevate the tank to minimize corrosion concerns. Our supports are available in different designs to accommodate specific installation requirements: UL saddles, skids, cradles or a variety of heating oil storage tank stands.
Custom Manways
Manways provide access to the tank and include a bolted cover and gasket. A variety of designs can be ordered for your specific project.
Complete Pump Systems
Your pump systems packages can be ordered to your specific needs. These can either be mounted on the tank, on a platform, or shipped loose for installation by others.
Fuel Guards and Spill Containments
Our Fuel Guards are powder coated (inside and out) and are available in 5 or 7.5 gallon sizes. The tops are designed so that they may be locked. Spill containments are designed per project spec. and contains 1/2” plunger to return spilled liquids.
Alarm Gauges
These provide detection for leak and level alarms.
FAQ’s
UL 142 double wall tank is designed for aboveground storage of flammable and combustible fuels, with an inner primary tank and an outer secondary containment wall built to UL 142 requirements.
Greer offers standard UL 142 double wall tank sizes including 300, 500, 1000 (standard and low profile), 1500, 2500, 3000, and 5000 gallons, with listed dimensions and weights on the page.
Standard features include female NPT openings (FPNT), a UL-sized emergency vent opening (3”–10”), and an 18” manhole on tanks larger than 76” diameter (per UL-142 specs), plus red oxide primer exterior and unpainted interior.