Application of polymer and composite materialsin the construction of main oil pipelines in areas with permafrostsoils

This article discusses problems with the design, construction, and operation of oil and petroleum product pipelines in regions characterized by permafrost soils. The best way of solving these problems involves polymer implementation and composite materials in pipeline structures, particularly in arctic desert and tundra zones. The paper presents case studies and research results concerning the performance of pipelines operating in permafrost conditions, along with a complete characterization of the aggressive environments affecting pipe reliabilityThe aim of this study is to substantiate the feasibility of using polymer and composite materials in oil transportation systems to reduce maintenance and repair costs in permafrost areas. We applied methods of an analysis of the chemical resistance of pipes. The study found that increasing the height of pipeline support s—necessary for aboveground installations in permafrost terrain — can lead to higher stress levels, potentially creating unfavourable operating conditions.The results also demonstrate the influence of structural elements on the pipeline’s performance in permafrost environments and help to identify the most suitable material for finite element modelling that takes into account seasonal ground deformations. The findings indicate that low-density polyethene (LDPE) pipes exhibit high resistance to the aggressive environments caused by impurities in crude oil. This makes LDPE a strong candidate for pipeline construction in permafrost zones.The significance of this study lies in demonstrating that the use of polymer and composite materials can reduce the impact of aggressive media on pipeline interiors. Among these materials, LDPE offers an optimal balance of performance and cost-effectiveness for use in such demanding conditions.