flange for concrete pump pipe 1,Forging&rolling, long service ... is 62-64 3.Stable quality, and low price. flange for concrete pump pipe MaterialQ235,20#steelModelDN125,DN150,DN175,so ... Zoomlion, Ihi, Niigata1.We are a manufacturer of flange and concrete pump pipe clamp,which use the national high quality 20# steel ... questions you may have. Best regards! DN125 Wear-resisting Flange For Concrete Pump Pipe