... of 62-64 4.long service life 2-3 times Concrete pump pipe flange MaterialQ235,20#steelModelDN125,DN150,DN175...etcTechnicalForging, ... high-temperature 1200 forging and intoAppicationConnection of Concrete pump and pump truck pipelineUsed forSchwing, PM, Kyokuto, Sany, ... 4"5"6"127mm148mm157mm175mm180mmPM male/femaleSchwing male/female DN125 Concrete Pump Pipe Flanges