TUESDAY, MARCH 29. Join the H2IQ Hour on March 29 at 9 AM PT to learn about the compatibility of pipeline materials with hydrogen and blends of hydrogen and natural gas. National laboratories within the U.S. Department of Energy's (DOE) Hydrogen Materials Compatibility Consortium (H-Mat) have led research and development (R&D) on hydrogen pipelines for over a decade in collaboration with other leading research groups and industry members throughout the United States.