VIDEO: Braided TPC Tube System Takes on Cryogenic Fuel Lines
Ductility at cryogenic extremes, not to mention the ability to bend to the complexities required for aerospace, led herone to pursue thermoplastic composites for LH2 fuel lines — with promising results. The company speaks more on the subject in this CW article and Thermoforged video.
Liquid hydrogen liquefies at -253°C — just 20° above absolute zero — cold enough to embrittle most structural materials, while hydrogen molecules are small enough to permeate through any gap. It’s a punishing operating environment, and conventional cryogenic fuel lines, built from aerospace-grade stainless steel with metallic flanges and adhesive interfaces, weren’t designed with weight or integration in mind.
Herone GmbH (Dresden, Germany) has spent several years re-engineering that problem from first principles, combining tape braiding and press molding to produce unitized carbon fiber/LMPAEK thermoplastic composite (TPC) fuel lines. Co-consolidated integral flanges form a continuous thermoplastic material system with the tube body, eliminating separate metallic hardware entirely — and projecting a 50-60% reduction in line system weight compared to stainless steel.
The target applications span liquid hydrogen aircraft propulsion and space launchers, with implications for anyone watching how composites enable the next generation of clean aviation infrastructure.
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