Natural gas deposits and a developed gas transport system (GTS) infrastructure of Russia are a national treasure that makes the country a leader in extraction and supply of natural gas – the cleanest type of fossil fuel. The operation of the GTS has a direct effect on energy, social, and economic security; in addition, Russia is the main supplier of gas to European countries. Therefore, the modernization of the GTS is one of the main directions of governmental work. This research investigates an expansion turbine for the trigger of a significant pressure drop at a low volume flow of natural gas with an electrical power of 1 kW, which is manufactured by 3D printing the plastic parts of the turbine. The study was conducted under a federal program titled “Research and Development in Priority Directions for the Development of the Scientific and Technological Complex of Russia in 2014-2020”. The research used the analytical method and mathematical calculation method. The validity of obtained results was achieved by using the ANSYS WB software. The results showed that using abutting contact shoulders in a plastic disc enables reducing the maximum stress in this disc by more than 25%.

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