Selection of structural materials for hydrogen pipelines and storage vessels

The feasibility, both of using present transmission lines, and of developing new resistant line pipe and pressure vessel steels, is explored. Both appear possible but simple extrapolation of existing conditions for natural gas storage and transmission is inappropriate. Specifically, composition, heat treatment and weldability requirements are more severe for hydrogen transport; pressure vessel steels are susceptible to hydrogen embrittlement and thus seamless vessels and/or protective liners are required; and high-strength resistant steels must be developed for compressors, valves and related equipment. These problems, while solvable, provide an urgent challenge to the materials engineer.