In addition to metals, polymers and composite materials are increasingly explored as hydrogen pipeline materials. Polymer-based pipelines are lightweight, corrosion-resistant, and easier to install, particularly in areas where metallic pipelines face challenges like soil corrosion or high flexibility requirements.

High-density polyethylene (HDPE) and polyamide composites are common polymer options. These materials offer excellent resistance to hydrogen embrittlement, which is a major concern with metal pipelines. HDPE, in particular, is widely used in low-pressure hydrogen distribution networks due to its flexibility and ease of joining.

However, polymer-based hydrogen pipeline materials are generally limited by their pressure ratings and temperature tolerance. Engineers must carefully design these pipelines, often reinforcing them with fiber composites to withstand higher pressures without compromising safety.

The development of polymer-based hydrogen pipelines reflects the push for innovative, cost-effective, and low-maintenance infrastructure. By selecting the right polymer or composite, operators can complement traditional metal pipelines and expand hydrogen distribution networks into urban and remote areas.