... of PP, PE, PB, PERT, ABS etc, PE Water/gas Supply Pipe Production Line 1) Qingdao Yonghuanxin Plastic Machinery Co.,Ltd ... supplies PE Water/gas Supply Pipe Production Line is developed by assimilating the state-of ... The pipes this large are often used as HDPE water supply pipes, natural gas supply pipes, in coal mines and other trenchless fields ...