... 64 3.Stable quality, and low price. flange for concrete pump pipe MaterialQ235,20#steelModelDN125,DN150,DN175,so onTechnicalForging, high-temperature ... Ihi, Niigata1.We are a manufacturer of flange and concrete pump pipe clamp,which use the national high quality 20# steel ... company developed and produced the new generation of concrete pump truck pipe flanges and wearing ring.We exported the advanced ...