... 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 ... , Zoomlion, Ihi, Niigata1.We are a manufacturer of flange and concrete pump pipe clamp,which use the national high quality 20# steel ...