Method for producing pipes having topographic inner structures

A method for producing a pipe with an inner pipe having topographic structures arranged on an inside of the inner pipe and having a coating arranged on an outside of the inner pipe, the method comprising:

• a) providing at least two pipe shell segments, each with an inner wall, an outer wall, and a peripheral abutment surface, which are placeable on one another in an accurately fitting manner to form the inner pipe;
• b) mounting or introducing the topographic structures on or in the inner wall of each pipe shell segment of the at least two pipe shell segments;
• c) placing the pipe shell segments on one another via the abutment surfaces to form the inner pipe so as to form abutment lines;
• d) fixing the pipe shell segments incorporated in the inner pipe by placing fixing means thereon;
• and
• e) additively applying a coating comprising a metallic material to an outer wall of the pipe shell segments over the abutment lines to form a contiguous pipe body.