DN125 Concrete Pump Pipe Flanges 1.Q235B(ASTM A36) 2.Forging,rolling 3.hardness ... of 62-64 4.long service life 2-3 times Concrete pump pipe flange MaterialQ235,20#steelModelDN125,DN150,DN175...etcTechnicalForging, high-temperature ... , GM 4"5"6"127mm148mm157mm175mm180mmPM male/femaleSchwing male/female DN125 Concrete Pump Pipe Flanges