Type 3 Hydrogen Storage Tank (COPV) – 205 L 350 Bar

by Steelhead Composites Inc.

  • Customizable high performance type 3 hydrogen storage tanks
  • Fast fill capabilities
  • Hydrogen storage capacity of 4.85 kg
  • Proven durability for drop and impact damage
  • Predictable leak-before-burst failure characteristics
  • Custom sizes/pressures available upon request
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Type 3 Hydrogen Storage Tank (COPV) – 205 L 350 Bar

  • Steelhead Composites set the standard for safe and effective hydrogen storage, transport, and distribution.
  • Steelhead Composites’ durable pressure vessels offer either seamless aluminum (Type III) or polymeric (Type IV) construction and are completely overwrapped with epoxy-impregnated carbon fibre composite.
  • Steelhead’s superior design, testing, quality systems, and third-party certifications ensure repeatable manufacturing of high-quality, reliable pressure vessels.
  • Patented “Steelhead” expanded port openings with hydrogen-ready, stainless steel or aluminum threaded connections large enough to house an in-tank valve and regulator.
  • Decades of pressure vessel manufacturing experience.
  • Sophisticated modeling and design tools.
  • Manufactured in our ISO 9001-2005 quality system and under an ISO 14001 environmental system.
  • Modern, fully electronic quality assurance system.

Key features

  • Custom, high-performance carbon fiber composite for least weight and long life capabilities.
  • Broad operating temperature range — from -40°C to 85°C (-40°F to 185°F).
  • Custom sizes/pressures available upon request.
  • Predictable leak-before-burst failure characteristics.
  • Type 3 hydrogen storage tanks with fast-fill capabilities.
  • Proven durability for drop and impact damage.
  • Minimal permeation of hydrogen at its maximum operating pressure.

Type 3 hydrogen storage tank COPV - Components

Technical specifications

  • Tank type – III
  • Outside diameter – 435 mm
  • Length – 2111 mm
  • Vessel mass – 135 kg
  • Water volume – 205 L
  • Hydrogen capacity- 4.85 kg
  • Manufacturing certifications
    • ISO 9001-2015
    • CE Module B
    • CE Module D
    • ISO 11119-2:2012
    • DNVG-OS-E101 Drilling
  •  Steelhead Composites vessels are certified to:
    • ISO
    • CE
    • DNV
    • ABS
    • DOT UN/ISO
    • ASME


  • Hydrogen trains
  • Marine applications
  • Fuel cell trucks and buses
  • Fuel cell vehicles
  • Fuel cell aircrafts
  • Space applications

Contact us

  • Steelhead Composites is a leader in the manufacture of Composite Overwrapped Pressure Vessels (COPV) or storage “tanks” for compressed hydrogen gas. Interested? Please contact Steelhead Composites, by filling in the contact vendor form.
Weight135 kg
Dimensions211.1 cm
Diameter (in mm)

Type of Tank

Max Storage (in kg H2)

Nom. Oper. Pressure (in bar)

Volume Water equival. (in L)

Compliant with

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Technology Readiness (TRL)

Manufacturing Readiness (MRL)

Product Brochure

Brochure: Hydrogen Storage Tank - COPV - Steelhead Composites

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      Steelhead Composites Inc.

      Steelhead Composites is a world-class advanced manufacturing company, based in Golden, Colorado (USA). Steelhead is dedicated to the design, engineering, manufacturing, testing and certificating of hydrogen storage systems. Steelhead also offer a full array of technical services in vessel design, metal spin forming, rotational molding, filament winding, prototyping and testing of hydrogen storage components and systems. Steelhead's hydrogen storage is certified and deployed in aerospace, stationary, mobility and maritime applications.

      Steelhead's patented technologies and engineering know-how in composite pressure vessels enable them to develop and certify products specific to customer needs. Steelhead prides itself on being able to deliver reliable, safe and custom vessels within a set, and often short, timeframe by relying on our in-house experts and dedication to manufacturing excellence. This allows Steelhead to bypass the traditional vendor/customer relationship by being more of a strategic partner to our customers through active participation in the development and launch of new products.

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