... 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, Zoomlion, GM 4 ...