The University of Tulsa received a $1,562,500 Project Grant award from the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Renewable Energy Research and Development Federal Grant Program (CFDA 81.087). The award's objectives are to address three key research questions regarding the flow behavior, material durability, and heat fusion joint properties of polyethylene pipelines when transporting blends of natural gas and hydrogen. Specifically, the project will investigate how fluid acceleration impacts the flow and transportability of natural gas-hydrogen blends, evaluate how exposure to these blends affects the chemical and mechanical properties of polyethylene compared to pure hydrogen, and analyze the differences in polyethylene's composition and structure within heat fusion joints versus the pipe bulk under similar exposure conditions. This research aims to inform the development of safe and efficient pipeline infrastructure to support the emerging hydrogen economy. The award period runs from September 1, 2024 to August 31, 2026.