... 2.Q235,hardness is 62-64 3.Stable quality, and low price. flange for concrete pump pipe MaterialQ235,20#steelModelDN125,DN150 ... and produced the new generation of concrete pump truck pipe flanges and wearing ring.We exported the advanced machine and take ... is superior to ordinary pipe fittings.4.Stable quality, and low price.5.In Shanghai port, FOB price.6.We hope ...