... life 2.Q235,hardness is 62-64 3.Stable quality, and low price. flange for concrete pump pipe MaterialQ235,20#steelModelDN125,DN150,DN175,so ... Zoomlion, Ihi, Niigata1.We are a manufacturer of flange and concrete pump pipe clamp,which use the national high quality 20# steel (Q235).After ... life and is superior to ordinary pipe fittings.4.Stable quality, and low price.5.In Shanghai port, FOB price.6 ...