UL-2085 vs. UL-142: Which Certification Is Right for Your Tank?

When selecting a fuel tank, one of the most important decisions involves safety and compliance, specifically, understanding which UL certification best fits your application. Two of the most commonly referenced standards in the fuel storage industry are UL-142 and UL-2085. While both certifications ensure a level of safety and performance, each is designed for different environments, risks, and regulatory needs.

This guide breaks down the key differences between UL-142 and UL-2085 fuel tanks and helps determine which certification is right for your job site, business, or fueling application.

What Does UL Certification Mean?

UL (Underwriters Laboratories) is a globally recognized safety certification organization. In the context of fuel tanks, UL certification means the tank has been tested to meet specific fire, structural, and environmental performance standards.

• UL-142: Standard for steel aboveground storage tanks
• UL-2085: Standard for fire-resistant, protected aboveground tanks

The right certification depends on your fuel type, location, exposure risks, and regulatory requirements.

UL-142 Tanks: The Industry Standard for General Use

UL-142 tanks are widely used across industries and are ideal for general-purpose fuel storage in locations where fire risk is controlled and containment systems are in place.

Key Features:

• Single- or double-wall construction
• Aboveground installation
• Common sizes: 150–20,000 gallons
• Can store diesel, gasoline, jet fuel, and more

Best For:

• Construction and agriculture
• Bulk fueling and fleet yards
• Indoor facilities and non-public access sites

Benefits:

• Cost-effective and widely available
• Easy to install and relocate
• Meets EPA, SPCC, and fire code requirements (with secondary containment)

Important Note: UL-142 tanks do not have built-in fire protection. Depending on local codes, additional safeguards (like fire-rated enclosures or barriers) may be required.

UL-2085 Tanks: Built for Enhanced Fire and Impact Protection

UL-2085 tanks take safety a step further. These are "protected" tanks designed to withstand extreme conditions, including fire exposure, physical impact, and ballistic forces. They are required in many high-risk or public-access areas.

Key Features:

• Thermal insulation layer for 2-hour fire resistance
• Ballistic and impact protection
• Built-in secondary containment
• Steel inner tank encased in reinforced concrete or insulation

Best For:

• Public or high-traffic fueling locations
• Airports and government facilities
• Schools, hospitals, and emergency services
• Urban construction with strict zoning/fire codes

Benefits:

• Meets NFPA 30A, UL-2085, and many local fire marshal standards
• Often required for retail fueling sites (gas stations, etc.)
• Provides peace of mind in sensitive or regulated environments

Important Note: UL-2085 tanks are typically more expensive and heavier due to their protective layers, but the investment is necessary where fire resistance is mandated.

UL-142 vs. UL-2085: A Side-by-Side Comparison

Choosing the Right Certification for Your Application

When deciding between UL-142 and UL-2085, consider:

• Local codes and fire marshal requirements
• Proximity to public spaces or buildings
• Fuel type (diesel vs. gasoline)
• Site security and exposure risks
• Budget and tank mobility needs
  

Consulting with a knowledgeable supplier like Mills Equipment ensures your tank meets the necessary certifications without overinvesting or compromising safety.

Still unsure which UL certification is right for your tank? Call Mills Equipment in Denver at (303) 321-6428 for expert advice, compliant tank options, and nationwide delivery tailored to your needs.