Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers. It combines the advantages of cast basalt and steel pipe, wear resistance, corrosion resistance, anti-high-pressure, transportation and easy installation. Water transport in plant ash and metal mine tailings pipeline hydraulic conveyance system appling this product can life up to 30 years. Cast basalt lined steel pipe is divided into straight tube, elbow, tee, reducer pipe.