... Pipe Material:ST52 45Mn2,20# Model:DN125*4.5mm*3000mm concrete pump high wear-resisting pipeProduct description:1.Profile and Products: Our ... reducers, couplings, rubber hoses, cleaning ball and so on.2.Concrete Pump Pipe Brands: Our products are top quality in china which ... CHUTIAN, HAINUO etc and have been recognized by them.3.Concrete Pump Pipe Technology: It is quenched and carried out carburizing ...