Challenges

Drop in replacement COPVs for existing infrastructure

Fleet operators often face the challenge of replacing aging or obsolete compressed natural gas (CNG) cylinders without overhauling their entire vehicle systems. Steelhead addresses this with precision-engineered drop-in replacement COPVs that match legacy dimensions and fittings—allowing for seamless integration into existing fuel systems with minimal downtime or reengineering.

Ensuring safety and longevity in harsh service environments

Transit and commercial vehicles operate in demanding conditions—exposed to vibration, temperature extremes, road debris, and corrosive environments. Steelhead’s Type 3 and Type 4 composite pressure vessels are built to withstand these stresses, offering superior fatigue resistance, corrosion protection, and long service life compared to traditional all-metal tanks.

Meeting NGV and FMVSS standards

Compliance with NGV2, FMVSS 304, and other regulatory standards is essential for fleet safety and legal operation. Steelhead’s vessels are rigorously tested and certified to meet or exceed these standards, ensuring that fleet operators remain compliant while benefiting from advanced lightweight storage technology.

Solutions and Recommendations

CNG Cylinders for Vehicles

New OEM integration and drop in replacement

  • Steelhead offers a full line of CNG cylinders designed for both new vehicle platforms and retrofit applications. These cylinders are engineered for compatibility with OEM specifications and are available in multiple sizes and configurations to support diverse vehicle types—from light-duty vans to heavy-duty transit buses.
Made in USA

Steelhead Type 3 and Type 4 products made 100% Colorado, USA

  • All Steelhead pressure vessels are proudly manufactured in Golden, Colorado, ensuring full traceability, quality control, and rapid delivery. This domestic production supports Buy America compliance and gives fleet operators confidence in the origin and reliability of their fuel storage systems.
Composite Overwrapping

to convert metal tanks to lighter composite Cylinders

  • For fleets looking to reduce vehicle weight and improve fuel efficiency, Steelhead offers composite overwrapping services that convert legacy metal tanks into high-performance composite vessels. This process enhances payload capacity and reduces wear on vehicle components without compromising safety.
Recertification Services

to keep legacy systems compliant

  • Steelhead provides inspection, testing, and recertification services for aging CNG cylinders, helping fleet operators extend the life of their assets while maintaining regulatory compliance. This service is especially valuable for municipalities and transit agencies managing large, mixed-age fleets.

Relevant Projects

Drop in replacement for over 20+ customers replacing expiring CNG cylinders

Steelhead has successfully supported more than 20 fleet operators with drop-in replacement solutions, helping them avoid costly system redesigns while upgrading to modern, lightweight COPVs.

CNG cylinders for fleets

Our CNG vessels are deployed across a wide range of fleet applications—including municipal transit, school buses, refuse trucks, and delivery vehicles—where they deliver proven performance, safety, and cost savings.