Flexyshell Concept

Using Pressure as an Ally

Most pressure vessels are designed as if pressure is the enemy.
The structure is made rigid and thick to resist it, which leads to weight, brittleness, and sudden failure when something goes wrong.

Flexyshell takes the opposite approach.

Think of a rugby ball. When it is pressurized, it becomes stiff, resilient, and extremely hard to damage. Flexyshell works the same way.
Internal pressure is what makes the structure strong. As pressure rises, the system stabilizes instead of becoming more vulnerable. Pressure turns the vessel into a self-supporting, tension-dominated structure that resists damage and deformation.

Modular by Design

Loads are carried by tension elements rather than locked into a rigid shell, so Flexyshell can be assembled, disassembled, and scaled. This allows storage systems to be expanded, repaired, or reconfigured in the field instead of being replaced as single, monolithic tanks.

A Smartphone Moment for Pressure Vessels

Flexyshell is not based on exotic materials or unproven physics. Flexible high pressure pipes already exist and proven. High-strength fibers and tendons already exist. Pressure-stiffened structures are well understood. Prestressed wired vessels can reach unimaginable high pressures.

What is new is the combination.

Just as the smartphone emerged from combining a mobile phone, a computer, and a digital camera into a single coherent product, Flexyshell combines existing principles into a new structural architecture. That combination creates capabilities that none of the individual technologies could deliver on their own.

 

The result is not a better tank — it is a new class of pressure vessel that makes entirely new markets possible, because the need is urgent but existing tanks cannot meet it.

Advantages

 

  • Material Selection Flexibility: A wide range of materials — steel, aramid, carbon fiber, or polymer liners — can be used according to specific application needs.
  • Cost reduction target: using HDPE and steel wire as the main materials for stationary storage, the design target is a cost well below today’s composite tanks.
  • Lightweight and Efficient: Material allocation where fiber is fully aligned with the forces drastically improves volumetric and gravimetric efficiency.
  • Simpler verification: each part carries one kind of load, so the vessel’s behaviour can be calculated from first principles. The aim is to reduce dependence on empirical testing.
  • Scalable Architecture: Longer vessels are built by joining more cylindrical sections end to end. The ends and their connections stay the same; only the length or number of tendons changes. Because the sections and tendons are the simplest and cheapest parts, when the storage capacity of a vessel is doubled, its cost is designed to rise much less than two times.
    Long Flexyshell vessels can also be assembled on site, so there is no need to transport or lift rigid tanks 50 to 100 metres long. The sections are joined, the tendons are put in place, and the vessel is pressurised and ready for service.
  • Modular and Serviceable: Components can be replaced or upgraded individually, extending operational life.
  • Integrated Safety: Tendon networks and optional outer shells are designed to provide staged containment and fail safe behaviour. It aims to lower insurance, operational and certification barriers.
  • Recyclable: Unlike conventional COPVs that must be scrapped as waste, Flexyshell modules are designed to be built from thermoplastic and separable parts that can be recycled and reused.

 

Designed for Multiple Applications

Whether for stationary hydrogen storage, mobile energy systems, or floating platforms, Flexyshell provides a unified structural solution. By separating stress pathways and using flexible, modular components, it offers an inherently safer, lighter, and more cost-effective alternative to traditional pressure vessel designs.