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  • By Triarc Tank
  • February 25, 2026
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Maximizing Profitability in LPG Transport: The TRIARC Tank MC331 Semi-Trailer

In fuel and NGL logistics, less tare weight equals more payload. For LPG distributors operating across the United States, finding the balance between a lightweight structure and uncompromising industrial durability is an absolute necessity.

The new TRIARC Tank MC331 Semi-Trailer breaks the traditional limitations of propane transport, offering a solution that prioritizes both regulatory compliance and Return on Investment (ROI).

Less Steel, More Efficiency

Many traditional or outdated trailers carry unnecessary dead weight, directly cutting into your profit margins.

TRIARC Tank’s design achieves an optimized tare weight of 22,300 lbs while maintaining a GVWR of 66,000 lbs. What does this mean for your fleet?

  • High Capacity: Legally transport up to 11,600 Nominal Water Gallons (WG).
  • Route Efficiency: By maximizing product per trip, you reduce total transport cycles and minimize general fleet wear and tear.

High-Strength Engineering & DOT Compliance

The MC331 relies on SA517B Quenched and Tempered Steel (115,000 psi minimum yield) for its structural integrity. This high-tensile material enables thinner, stronger vessel walls capable of managing 250 PSI operating pressure and surviving 500 PSI hydrostatic tests.

Furthermore, it offers total regulatory peace of mind. We engineer every unit to meet or exceed the industry’s strictest compliance standards:

  • DOT MC-331 Compliance
  • NFPA 58 Standards
  • In House ASME Post-Weld Stress Relief and 100% Non-Destructive Testing (X-Ray/Radiography).

Reliable Components

In the  US market, parts availability and brand trust are vital. TRIARC Tank integrates components from leading US suppliers, ensuring maintenance is simple, fast, and accessible.

Key Specifications:

  • High-Speed Pumping: Equipped with a Blackmer TLGLF-4 hydraulic pump and air-operated Marshall Excelsior internal valves.
  • Running Gear: Ridewell 23,000 lb suspension, 49″ axle spacing, Alcoa aluminum wheels, and Goodyear 11R22.5 tires.
  • Active Safety: Wabco ABS system, brake interlocks, and recessed relief valves to minimize risks in the event of a rollover.

Weather-Ready Performance

Maximizing Profitability in LPG Transport: The TRIARC Tank MC331 Semi-Trailer

The steel and components of the MC331 are certified to operate in a thermal range of -20°F to 125°F, ensuring your fleet never stops due to extreme weather conditions across the country.

To protect against road salt and humidity, every unit comes with a heavy-duty paint system and stainless-steel fasteners, backed by a 3-year limited warranty.

Spec Highlights 
Capacity11,600 Nominal Water Gallons (WG)
Dimensions83.5″ Diameter44′ 4″ Overall Length 8′ 6″ Width
Construction SA517B Quenched and Tempered Steel shell and headsTwo aluminum X-style baffles.
Operating Pressure 250 PSIHydro-tested to 500 PSI.
Pump and ValvingBlackmer TLGLF-4 hydraulic pump; Marshall Excelsior air-operated internal valves; stainless-steel secondary globe valves on both sides.
Running GearRidewell 23,000 lb suspension with two axles (49″ spacing); Alcoa aluminum wheels Goodyear 11R22.5 tires.
Safety and ControlsDual 3″ pressure relief valves, Rochester float gauge, pressure and thermometer gauges, and Wabco ABS system.
Additional Features Aluminum hose carriers BETTS LED lighting; fire extinguisher; document holder.
MC331 Semi-Trailer Benefits
Designed to maximize weight distribution and payload based on your specific needs.
Equipped with trusted US brands like Blackmer, Marshall Excelsior, and Jost.
Corrosion-resistant paint system and stainless-steel fasteners.
100% Non-Destructive Testing (X-Ray, magnetic particle) and ASME stress relief.
Available with lift axles, cabinets, tire inflation systems, and plumbing options (carbon/stainless).
Pre-production tractor data analysis to ensure precise engineering and fit.
US Market Focus: Manufactured specifically to meet local regulations and operator preferences.

A Smart Investment for Your Fleet

Whether you need lift axles, tire inflation systems, or custom cabinets, TRIARC Tank offers tailored engineering based on your specific tractor data. The MC331 semi-trailer isn’t just a tank; it’s a precision tool that improves your operating margins from the very first haul.

Ready to optimize your LPG logistics? Contact Nick Procopio at nick.procopio@triarccorp.com to reserve your unit today.

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