Search

As the most efficient way to transport large quantities of hydrogen over long distances, Hydrogendoped NG pipeline has been actively promoted and developed. Hydrogen into the pipeline will have a variety of effects, as the smallest gas molecules, hydrogen on the pipeline valve, and other key equipment nonmetallic materials have a stronger penetration than natural gas, which is bound to increase the leakage of equipment, there are huge security risks. In this paper, the permeability of non-metallic materials in hydrogendoped NG pipelines is studied by permeability experiments. Seven common non-metallic materials for natural gas pipeline valves and key equipment are compared and selected. The numerical simulation model of hydrogen permeation in non-metallic materials was established to explore the permeability of non-metallic materials under different pressures, temperatures, and mixing ratios of hydrogen. The non-metallic sealing materials suitable for the hydrogen-doped environment are optimized, which can furnish reference for the engineering promotion and technology development of hydrogen-doped natural gas pipeline transportation.