Study on the Permeability of Nonmetallic Materials in the Hydrogen-Doped PipelineXin Ouyang, Hongni Ai, Yebin Pei, Chuanbo Cong, Sheng Sun and Xiaoben LiuE3S Web Conf., 598 (2024) 01012DOI: https://doi.org/10.1051/e3sconf/202459801012