Abstract: As a kind of functioning material, the dual metal pipe has a number of advantages when used for pipe line purpose. Depending on different natures of materials to be conveyed, the pipe inner surface can be lined with a metal either the same as or other than the pipe base metal by means of the plastic deformation complex technique so as to meet the following requirements:1) increasing both corrosion resistance and wear resistance of the pipe inner surface; 2) reducing the friction factor and the resistance against the materials being conveyed in the pipe line; 3) easy processing, installation and maintenance of the pipe line. As a result, pipe lines made with dual metal pipes are applicable for transport of gas and slurry materials under different conditions.