Fuel-Vault® Dual Wall Tanks
ULC S601 Certified
Fuel-Vault® dual wall tanks certified for combustible/flammable liquid storage include diesel and gasoline

AGI Westeel Fuel-Vault® Dual Wall Tanks Tanks: Reliable Storage Solutions for Flammable and Combustible Fluids 

The AGI Westeel Fuel-Vault® line offers industry-leading, ULCS601-certified dual wall aboveground steel tanks for the secure storage of flammable and combustible fluids, including gasoline, diesel, biofuels and aviation fuels. With over 75 years of tank manufacturing expertise, AGI Westeel delivers robust storage solutions designed to meet the rigorous demands of various industries and comply with national and provincial fire codes. 

Industry-Standard Certification

The ULCS601 certification represents the gold standard for aboveground steel tanks, ensuring compliance with fire safety regulations and reliability for critical applications. This certification is embedded in fire codes across Canada, making AGI Westeel Fuel-Vault tanks the trusted choice for industries requiring top-tier storage solutions.
Available configurations
*Maximum capacity can vary based on factory cranage weight limits.
Max capacity*
Max diameter/width
Max length
Multiple compartments
Horizontal Tanks
Max capacity* 150,000L
Max diameter/width 4m (157”)
Max length 16m (576”)
Multiple compartments Yes
Vertical Tanks
Max capacity* 175,000L
Max diameter/width 4m (157”)
Max length 16m (576”)
Multiple compartments No
Rectangular Tanks
Max capacity* 100,000L
Max diameter/width 3m (118”)
Max length 9m (480”)
Multiple compartments Yes

Tanks can be purchased in three ways:

  1. Tank-only for simplified applications or end-user supply.

  2. Standard configurations including pumps, nozzles, meters and optional equipment.

  3. Custom configurations turnkey or near-turnkey solutions tailored to client specifications and site requirements. 

 

Typical Applications

Dual-wall ULC S601-certified tanks are essential in industries such as:

  • Agriculture 
  • Forestry 
  • Firefighting 
  • Tank rentals 
  • Aviation 
  • Fuel distribution 
  • Transportation 
  • Retail fueling / gas stations 
  • Power generation 
  • Standby diesel storage 
  • Chemicals 
  • Oil and Gas 
  • Construction 
  • Mining 


They are ideal for facilities requiring safe and reliable storage of flammable or combustible fluids.

 

Key Features

Fuel-Vault tanks are designed for durability, safety and ease of operation, featuring:

  • Durable steel construction with a corrosion-resistant coating for extended longevity.
  • Secondary shell providing a minimum of 100% containment for added environmental protection.
  • Large mouth spill box with fill, gauge and drain openings, equipped with a lockable, weatherproof cover (standard for tanks over 11,000 liters; available for smaller tanks).
  • Interstitial space inspection port for efficient monitoring.
  • Emergency pressure surge vent for enhanced safety.
  • Gauge stick and holder, along with a gauge chart, for tanks over 4,500 liters.
  • Heavy-duty lifting lugs for simplified installation and relocation.
  • Unistrut tabs for mounting additional equipment.

 

Proven Legacy

AGI Westeel has been at the forefront of tank manufacturing for over seven decades, combining engineering excellence with innovative design. Choose the AGI Westeel Fuel-Vault line for a storage solution that offers unmatched quality, flexibility and peace of mind.

Accordance Compliance

  • CAN/ULC - S601 current version 
  • National/provincial fire code compliant 
  • Enviromental farm plan compliant 
  • Alberta energy regulator - directive 055
Specifications
Specifications

Small Fuel-Vault ULC S601 Dual Wall Tanks 

Fuel Vault Horizontal Double Wall AST.png

Medium Fuel-Vault ULC S601 Dual Wall Tanks

Fuel Vault Horizontal Double Wall 8500 to 11000L.png

Large Fuel-Vault ULC S601 Dual Wall Tanks  

Fuel Vault Horizontal Dual Wall 15000 to 75000L.png

Small and Medium Fuel-Vault ULC S601 Skids 

Skid Base.png
Tank Options and Features
Standard vs. custom tanks
Standard vs. custom tanks AGI Westeel offers standard tanks for basic needs and custom tanks tailored for complex projects. Our experts help determine the best solution, ensuring optimal performance whether a standard or fully customized tank is required.
Engineering, project management and design excellence
Engineering, project management and design excellence AGI Westeel provides custom tank solutions with expert engineering, project management, and design. Our certified tanks meet UL/ULC standards, integrate seamlessly into projects, and we offer sealed drawings for custom load, structural and seismic requirements beyond standard certifications.
Flammable and combustible liquids
Flammable and combustible liquids Our UL and ULC-listed aboveground steel tanks provide safe, compliant storage for a variety of industrial fluids beyond diesel and gasoline, including oils, solvents, biofuels and chemicals, offering durable, customizable solutions for diverse applications.
Catwalks and accesses
Catwalks and accesses AGI Westeel offers custom-designed access systems for steel aboveground tanks, including catwalks, ladders, and staircases. These versatile solutions ensure safety, durability and easy access, with options for horizontal, rectangular or vertical tanks.
Turnkey systems
Turnkey systems AGI Westeel offers turnkey steel aboveground tanks with factory-installed accessories like pumps, dispensers, and control rooms. Our streamlined process includes approval drawings, shop fabrication and pre-assembled components, ensuring quick onsite assembly and efficient operation.
Stainless steel tanks & accessories
Stainless steel tanks & accessories AGI Westeel's stainless steel tanks offer superior corrosion resistance for harsh environments. Available in single and dual-wall configurations, with pickled and passivated internal surfaces, they meet ULC certifications and are ideal for DEF storage, chemicals, aviation fuels and marine applications.
Static head tanks
Static head tanks AGI Westeel's static head steel aboveground tanks are engineered to withstand high-pressure filling from elevated heights, with dished ends for enhanced strength. Available in UL/ULC dual-wall designs, they are ideal for sub-grade installations in commercial structures.
Power generation
Power generation Our steel aboveground tanks provide reliable fuel storage for power generation, including diesel, day and generator base tanks. Essential for urban skyscrapers and rural areas, they ensure uninterrupted power during outages, meeting growing demands for backup systems.
Aviation tanks
Aviation tanks AGI Westeel offers durable, customizable aboveground steel tanks for aviation fuels, compliant with Canadian and U.S. regulations. Tanks feature epoxy or stainless steel linings for corrosion resistance, meet environmental standards and are secondary contained.
Epoxy lining
Epoxy lining Epoxy-lined aboveground steel tanks provide superior yet economical corrosion resistance for storing aviation fuels, chemicals and corrosive fluids. For smaller tanks under 5,000L (1,315G), stainless steel liners offer a cost-neutral alternative when fluid compatibility allows, ensuring durability and reduced maintenance.
Tank insulation and cladding
Tank insulation and cladding AGI Westeel offers heating and insulation solutions for aboveground steel tanks, including electric heaters, heat trace, mineral wool insulation, Tex Shield Polyurea (diesel-compatible), advanced controls integration and more, ensuring precise temperature management and freeze protection in demanding environments.
Powder coating
Powder coating AGI Westeel’s proprietary powder coating system offers superior durability, with optional zinc epoxy base coat for corrosion resistance. Tanks over 10,000L (2,600G) include, as standard, reclaim sandblast plus powder application, ensuring long-lasting protection and reduced maintenance.
Tank Skids
Tank Skids AGI Westeel’s tank base skids offer durable support with options like standard, heavy-duty, or live roll skids. Customizable with platforms, pumps, seismic anchoring, and more, they’re ideal for gravel bases, temporary setups, or permanent installations.
Vacuum-monitored tanks
Vacuum-monitored tanks AGI Westeel’s vacuum-monitored dual-wall tanks ensure continuous leak detection, safeguarding structural integrity and the environment. With manual or electronic monitoring options, they enhance safety, efficiency and environmental security while reducing maintenance costs and preventing contamination risks.
Containment basins
Containment basins Steel containment basins ensure spill containment for aboveground tanks and external plumbing leaks. Used with single and dual-wall tanks in indoor or monitored spaces, they are customizable and available on request for enhanced environmental protection and regulatory compliance.
Product Resources
Fuel & Flammable - Combustible Liquid Storage Brochure
Let us know more

 

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Customer Support (1-800-665-2099) Email Customer Support Petroleum Tank Contact Form Top Tips for Fuel Tank Replacement Project Profile Article
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