ST52 Concrete Pump Placement Pipe with SK Flange Material:ST52, 45Mn2, 20#,Q235 ... 5 1/2" Concrete Pump Straight Pipe 1.Profile and Products: We are a professional manufacturer of concrete ... 7.0148mmChrome Carbide insertSchwing,Putzmeister, CIFA, Kyokuto, SanyZX-Pipe(ST52)Harden ZX-Pipe1257.0ZX-5 inchF/M FlangesPutzmeisterHigh ... MOthersproduct picture: ST52 Concrete Pump Placement Pipe with SK Flange