PSI - Issue 77

Niels Grigat et al. / Procedia Structural Integrity 77 (2026) 365–375 Niels Grigat / Structural Integrity Procedia 00 (2026) 000 – 000

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The initial phase involves the formulation of material and design concepts for FRP pipelines, subsequently accompanied by the development of analytical and numerical models to delineate their structural and diffusion behaviour. The validation of these models is achieved through the execution of comprehensive material testing on wound plate specimens. The resulting data are then integrated into refined simulations to predict the mechanical and barrier performance of full-scale components. Finally, prototype FRP pipelines have been produced and their performance experimentally validated under hydrogen-relevant conditions. The experimental methodology adopted in this study encompasses the conceptual design, modelling and simulation, material testing, and prototype validation of fibre-reinforced plastic (FRP) pipelines for hydrogen transport. The overall workflow is illustrated in Figure 3.1 below:

Figure 3.1:

Development steps of fibre-reinforce plastic pipelines for the transport of gaseous hydrogen

3.1. Development of FRP Pipelines The development of FRP pipelines for hydrogen transport is conducted within the framework of the research project HyInnoNets2 within the hydrogen cluster at RWTH Aachen university. The project's objectives also include the transfer of knowledge and manufacturing principles from composite pressure vessel (CPV) technology to continuously producible fibre-reinforced plastic (FRP) pipeline systems. The methodology combines conceptual design, material modelling, and experimental validation to ensure both mechanical robustness and resistance to hydrogen permeation.