... quality, and low price. flange for concrete pump pipe MaterialQ235,20#steelModelDN125,DN150,DN175,so onTechnicalForging, high- ... We are a manufacturer of flange and concrete pump pipe clamp,which use the national high quality 20# ... produced the new generation of concrete pump truck pipe flanges and wearing ring.We exported the advanced ... may have. Best regards! Concrete Pump Pipe Flanges/ Weld-on Collars