DN125 Concrete Pump Pipe Flanges 1.Q235B(ASTM A36) 2.Forging,rolling 3.hardness of 62-64 4.long service life ... 2-3 times DN125 Concrete pump pipe flange MaterialQ235, ... ,DN150,DN175...etcTechnicalForging, high-temperature 1200 forging and intoAppicationConnection of Concrete pump and pump truck pipelineUsed forSchwing, PM, Kyokuto, Sany, Zoomlion, ...