Please note that this deliverable is in the process of approval by the European Commission, and a final version may replace it at a later date.
This deliverable provides a review of the standards for testing and qualification of metallic materials for
hydrogen gas and includes a gap analysis in the context of blending of hydrogen into the natural gas grid.
The review revealed that while existing standards for qualifying metallic materials for hydrogen service offer
a solid foundation, they also exhibit significant gaps and ambiguities, particularly because they are not
specifically designed for hydrogen blending in existing gas grids. Some testing standards also lack clarity or
detail, affecting the robustness of material performance assessments in hydrogen environments. The need
for harmonization across standards is crucial for streamlining the assessment process and ensuring
consistent criteria and understanding across Europe and globally. Our report also proposes several fields for
further research, to help close these gaps.
