... resistant and antistatic pipe 2.Flange connection 3.Coal mine pipeline special HDPE pipes for miningHDPE pipes for ... in coal mine underground for drainage, ventilation, coal slurry delivery, gas drainage and so onCoal mine special pipeUnderground coal mine with ... and transition joint.ApplicationsMainly used in underground coal mine for drainage, ventilation, coal slurry delivery, gas drainage and so ...