Aim of an ongoing research project at ZBT is the development of an extrusion process and a thermoplastic-graphite-compound for the production of a plastic pipe with an increased thermal conductivity in the range of 2 - 5 W/mK (in radial direction) and the standardized strength requirements for pipes made of PE and PP. The product dimensions of the pipe to be developed should meet nominal diameters from DN25 to DN32 with an internal pressure resistance of PN6 (6 bar). The choice of this dimension, which is customary in the industry, guarantees a broad industrial applicability of the project results and ensures the basis for further development to other product dimensions. The particle orientation of flakey graphite in an extruded pipe is to be influenced by an innovative extrusion tool in order to achieve a high thermal conductivity with the lowest possible filler content and thus to achieve the required strength and bending stiffness. By orienting the filler particles in the heat-conducting direction (through the tube wall), the required filler content is significantly reduced and the now higher polymer content ensures sufficient mechanical strength and deformability of the tube. In this project three different concepts of creating an orientation in the extruded pipes were designed and were then compared to classic pipe extrusion using a custom-made test bench. High increases in thermal conductivity could be achieved leading to a better performance of extruded pipes in heat exchanger applications.