... sealing 3. Quick coupling connection Antistatic & Flame Resistant HDPE Pipe ApplicationThis product falls into coal-mine use water pipes, ... Holt-melt connection, FlangeQuality assurance:1. This kind of pipe has obtained the certification of “MA” (Coal Mining ... pipes and pipe fittings, we mainly export PE pipe, PPR pipe, SRTP pipe, PE-RT pipe, HDPE pipe,UHMW pipe and supporting pipe fittings with ...