GenH2 and ITP Interpipe validate liquid hydrogen pipe insulation

GenH2 and ITP Interpipe said they successfully qualified ITP Interpipe’s Izoflex insulation for liquid hydrogen pipe-in-pipe pipelines using GenH2’s Cryostat CS900 test platform in Titusville, Florida. The results mark a step toward full-scale system testing and commercial deployment of liquid hydrogen infrastructure.

Why it matters: - The test helps validate insulation performance for liquid hydrogen pipelines, where heat ingress can reduce efficiency, weaken product quality and increase hydrogen losses. - Reliable thermal insulation is a key requirement as liquid hydrogen production, transport and storage scale. - The results support qualification of infrastructure intended for commercial hydrogen use.

What happened: - GenH2 and ITP Interpipe announced successful thermal qualification of ITP Interpipe’s Izoflex insulation system for liquid hydrogen pipe-in-pipe pipelines. - The testing took place on GenH2’s Cryostat CS900 Liquid Hydrogen Simulation Test Platform in Titusville, Florida. - The companies used ASTM C1774 as the test standard. - The results were presented at the ICEC30/ICMC2026 Conference by Aurélien Damour of ITP Interpipe and James E. Fesmire of GenH2.

The details: - The test platform was integrated with GenH2’s LS20 liquefaction and refrigerated storage system. - Test conditions included a 20 K cold boundary, a 293 K warm boundary, controlled soft-vacuum pressure and a four-layer Izoflex configuration around a representative pipe. - The measured heat ingress met the thermal performance specifications required for liquid hydrogen pipeline applications. - The qualification is the third of four phases in ITP Interpipe’s liquid hydrogen pipe-in-pipe program. - Earlier phases covered metallic material qualification for liquid hydrogen service, including hydrogen embrittlement characterization, and Izoflex compatibility testing with liquid oxygen. - The final phase will be full-scale system testing. - The project received support from the French State through the Investments for the Future Programme, now part of France 2030, and was operated by ADEME. - ITP Interpipe’s pipe-in-pipe design builds on LNG pipeline experience and uses components engineered for liquid hydrogen service. - Izoflex operates under soft-vacuum conditions and is designed to provide low thermal conductivity and structural support without internal spacers between the inner and outer pipes. - A 36% Ni steel inner pipe with a low coefficient of thermal expansion allows installation underground, subsea or above ground without expansion loops. - GenH2 said the Cryostat CS900 provides precise thermal measurements under controlled vacuum, temperature and gas-environment conditions in accordance with ASTM C1774. - The companies said the technology may also fit liquid nitrogen systems for superconducting power cables, liquid oxygen infrastructure and LNG pipelines.

Between the lines: - The test moves both companies closer to proving the system at full scale, which is usually the last hurdle before broader commercial use. - Standards-based validation matters because hydrogen infrastructure buyers and operators need comparable performance data before adopting new designs. - ITP Interpipe is positioning its liquid hydrogen system as an extension of proven LNG pipe-in-pipe expertise rather than a completely new concept.

What's next: - The next qualification phase will test the complete pipe-in-pipe system at full scale. - The companies will use the current material- and component-level results as the basis for that final stage. - If full-scale testing is successful, the technology could move closer to commercial deployment in liquid hydrogen infrastructure.

The bottom line: - GenH2 and ITP Interpipe cleared a major qualification step for liquid hydrogen pipeline insulation, and the next full-scale test will determine whether the system is ready for broader deployment.