ST52 Concrete Pump Placement Pipe with SK Flange Material:ST52, 45Mn2, 20#,Q235 Brand: Schwing, PM, ... hose, elbow, bend, reducer, coupling, cleaning ball, piston, cylinder, eye-glass plate, cutting ring, concrete placing boom, and so on2. application: We ... /ZX-6inch F/MOthersproduct picture: ST52 Concrete Pump Placement Pipe with SK Flange