Study on the Permeability of Nonmetallic Materials in the Hydrogen-Doped Pipeline Xin Ouyang, Hongni Ai, Yebin Pei, Chuanbo Cong, Sheng Sun and Xiaoben Liu E3S Web Conf., 598 (2024) 01012 Published online: 27 November 2024 DOI: 10.1051/e3sconf/202459801012