Above Ground UL 142 Double Wall Storage Tanks

UL 142 Horizontal

Above Ground UL 142 Double Wall Storage Tanks

Fire codes, environmental policies and SPCC (spill prevention, control and countermeasure) regulations have a secondary containment requirement for aboveground storage tanks. To meet this requirement, UL 142 double wall tanks are commonly used. Double wall storage tanks feature an inner tank tightly wrapped within an outer tank. This provides a convenient secondary containment solution in one unit.

The UL 142 Standard

The UL 142 Standard for Steel Aboveground Tanks for Flammable and Combustible Liquids is one of the most common construction standards for the tank industry. One type of tank covered under this standard is the double wall storage tank. Underwriters Laboratories (UL) is an accredited developer of standards for product safety and performance. UL standards are widely recognized in the United States and Canada across many industries. UL Certified or listed means that UL has tested product samples and determined that it meets UL’s nationally recognized Standards for Safety. A UL product listing or certification demonstrates the manufacturer’s experience in the industry, the commitment it makes to quality and steps it has taken to ensure its products can be safely used. There is no legal requirement that all tanks must be UL certified or listed. However, the regulating authority or fire marshal may set such requirements in their jurisdiction.

Costs

Double wall storage tanks are usually preferred over single wall tanks, not only due to requirements, but also due to costs. The drawbacks of single wall tanks VS double wall storage tanks are the costs involved with owning and installing a single wall tank. Relocating single wall storage tanks within a concrete dike can be an issue, as concrete dikes are permanent structures. Double wall storage tanks are a complete unit, so no separate dike is required and relocation is easy.

Single Wall Storage Tanks

We also offer single wall storage tanks to customers that have a need for them. They also are commonly used for petroleum products and chemicals, where open top containment boxes or concrete dike structures provide a secondary containment.

Application

Our tanks range in sizes from 185 gallons to 30,000 gallons, in both single and multiple compartment systems. They can be constructed of mild carbon steel or stainless steel. Interior coatings are available when additional corrosion resistance is needed. Exteriors come standard with red oxide primer. We have a selection of colors customers can choose from if a painted topcoat is desired. We offer a full line of safety accessories, such as stairs and ladders for our storage tanks. We have many options for spill prevention. Tank equipment packages are available for customers who prefer a turn key job. With this option, pumps and equipment are pre-mounted to the tank and plumbing is pre-installed prior to shipment. Our double wall storage tanks are suitable for the storage of a variety of products including gasoline, diesel fuels, antifreeze, oils, lubricants, waste oil, biodiesel, chemicals, water storage and more.

Supports

For Bottom Anti-Roll Support And Ground Clearance, We Offer A Variety Of Supports For Our Double Wall Storage Tanks. These Include Saddles, Leg Supports, Light Duty Skids, Box Skids, Heavy Duty Skids, Pipe Skids And Super Heavy Duty WF Beam Skids.

Single Wall Vs Double Wall

Fire codes, environmental policies and SPCC (spill prevention, control and countermeasure) regulations have a secondary containment requirement for aboveground storage tanks. To meet this requirement, UL 142 double wall above ground storage tanks are commonly used. UL 142 single wall tanks are also commonly used, where open top containment boxes or concrete dike structures provide a secondary containment. Purchasing a single wall above ground horizontal storage tank can be to the buyer’s advantage if a secondary containment already exists or can be constructed at a low cost. Single wall storage tanks are less costly than double wall storage tanks. The drawbacks of owning single wall storage tanks VS double wall tanks are costs of installation, costs if a concrete dike must be constructed. Also, there is periodic maintenance involved. Relocating single wall storage tanks within a concrete dike can be an issue, as concrete dikes are permanent structures. A double wall above ground horizontal storage tank would be a cleaner application and less time would be consumed in maintenance. There is no need for continuous disposal of collected contaminated water. Depending on the situation, the costs of installing and owning single wall above ground horizontal storage tanks may outweigh the additional costs to purchase double wall tanks. Each user should study those costs to determine which tank is the best investment.

UL 142 Horizontal