The Concrete Pump Pipes is made of special quality steel which is quenched and carried out carburizing chemical treatment on the inner wall. The hardness of the flanged bushings can reach 58-60 degrees and the serving life of pipeline can increase 3-5 times, which enables users to save time and cost, enhancing the production efficiency.  carbon steel seamless dn125 concrete pump pipe Thickness 4.5mm Flange SK/ Forging Packing 200 pcs / 20ft Type Seamless pipe Use life  15000-30000cbm Connection Flange Character Wear-resistant Length 3M or as According to customer requirements Type