... , and low price. flange for concrete pump pipe MaterialQ235,20#steelModelDN125,DN150,DN175,so onTechnicalForging, high-temperature 1200 forging and intoAppicationConnection ... and wearing ring.We exported the advanced machine and take high-tech heat treatment technology, the hardness is 62-64 ... °.3.This series of products is high abrasion resistance.It is long service life and is superior ...