Double-Wall Steel, Underground Fuel-Oil, Storage Tanks

MasterFormat Division 23 13 13.13: Double-Wall Steel, Underground Fuel-Oil Storage Tanks

Underground fuel oil storage tanks are essential components for various industries relying on fuel oil for heating, power generation, or other operational needs. Double-wall steel tanks, specifically classified under MasterFormat Division 23 13 13.13, offer enhanced safety and environmental protection compared to single-wall counterparts. This article delves into the specifics of these tanks, covering their definition, functionality, common applications, installation best practices, and leading manufacturers.

What is a Double-Wall Steel, Underground Fuel-Oil Storage Tank?

A double-wall steel, underground fuel-oil storage tank, as the name suggests, is a storage vessel consisting of two separate steel walls separated by an interstitial space. This design provides a secondary containment layer, significantly reducing the risk of fuel leaks and spills contaminating the surrounding environment. The outer wall acts as the primary containment for the stored fuel oil, while the inner wall provides a secondary barrier. The interstitial space between the walls is constantly monitored for leaks, providing an early warning system in case of any breaches.

How Does a Double-Wall Steel, Underground Fuel-Oil Storage Tank Work?

Double-wall steel tanks operate on a simple yet effective principle.

• **Primary Containment:** The inner steel wall serves as the primary container for the fuel oil.
• **Secondary Containment:** The outer steel wall acts as a backup containment system in case the inner wall fails.
• **Interstitial Monitoring:** The space between the walls is equipped with monitoring devices to detect any leaks from the inner tank. This space may be designed as a vacuum, allowing sensors to quickly detect any presence of fuel oil.

Where are Double-Wall Steel, Underground Fuel-Oil Storage Tanks Commonly Used?

Due to their robust safety features, double-wall steel tanks are commonly employed in locations where environmental protection and safety are paramount. Some common applications include:

• **Gas Stations:** Storing gasoline and diesel fuel beneath the ground.
• **Commercial Buildings:** Providing heating oil storage for large buildings like offices, hospitals, and schools.
• **Industrial Facilities:** Storing fuel oil for various industrial processes and machinery.
• **Power Plants:** Holding fuel oil reserves for power generation.

What are Installation Best Practices for Double-Wall Steel, Underground Fuel-Oil Storage Tanks?

Proper installation is crucial for the safe and effective operation of these tanks. Key best practices include:

• **Site Assessment:** A thorough geotechnical assessment to determine soil composition, water table depth, and potential environmental hazards.
• **Proper Excavation and Backfill:** Excavation to the correct dimensions and the use of appropriate backfill materials (usually a specific gradation of sand or gravel) to ensure proper tank support and drainage.
• **Containment Area:** Construction of a secondary containment area, such as a concrete vault, to contain any spills or leaks even from the outer wall.
• **Leak Detection System Installation:** Correct installation and testing of the interstitial monitoring system to ensure it functions as intended.
• **Corrosion Protection:** Application of appropriate corrosion protection systems, such as cathodic protection, to both the inner and outer tank walls.
• **Pressure Testing:** Performing thorough pressure testing of both the inner and outer walls and the interstitial space to confirm their integrity.
• **Permits and Inspections:** Securing all necessary permits and scheduling inspections at various stages of the installation process to ensure compliance with local regulations.

What are the Top Manufacturers for Double-Wall Steel, Underground Fuel-Oil Storage Tanks?

Several reputable manufacturers specialize in producing high-quality double-wall steel tanks. Some industry leaders include:

• **Xerxes Corporation**
• **Highland Tank**
• **Roth Industries**
• **Superior Tank Co., Inc.**
• **Tank Products, Inc.**

(**Note:** This list is not exhaustive and manufacturers may vary based on geographical location and specific project requirements. It's always recommended to thoroughly research and compare multiple manufacturers before making a selection.)

Conclusion

Double-wall steel, underground fuel-oil storage tanks provide a secure and environmentally responsible solution for storing fuel oil. By understanding their design, functionality, installation best practices, and leading manufacturers, those involved in fuel storage projects can make informed decisions that prioritize safety, environmental protection, and long-term operational efficiency. Remember to always consult with licensed professionals for site assessments, tank selection, installation, and ongoing maintenance.