... , 20#,Q235 Brand: Schwing, PM, Sany, Kyokuto DN125 5 1/2" Concrete Pump Straight Pipe 1.Profile and Products: We are a ... , coupling, cleaning ball, piston, cylinder, eye-glass plate, cutting ring, concrete placing boom, and so on2. application: We have been supplying ... promise you the quality and best price.3.Technology: Our concrete pump pipe is quenched and carried out carburizing chemical treatment ...