flange for concrete pump pipe 1,Forging&rolling, long service life 2.Q235,hardness is ... 62-64 3.Stable quality, and low price. flange for concrete pump pipe MaterialQ235,20#steelModelDN125,DN150,DN175,so onTechnicalForging, high-temperature ... with any questions you may have. Best regards! DN125 Forged Pipe Flanges For Concrete Pump,Carbon Flange