flange for concrete pump pipe 1,Forging&rolling, long service ... 62-64 3.Stable quality, and low price. flange for concrete pump pipe MaterialQ235,20#steelModelDN125,DN150,DN175,so onTechnicalForging, ... manufacturer of flange and concrete pump pipe clamp,which use the national high quality 20# steel (Q235).After high-temperature ... may have. Best regards! DN125 Wear-resisting Flange For Concrete Pump Pipe