Improving the Safety of Pipelines in Protective Cases at Low Temperatures

Abstract

Model experimental studies have been carried out and the cause of emergencies with pipes in protective cases used in the construction of pipelines has been identified. The design of a protective case has been developed, which excludes deformation or destruction of the pipeline when water freezes in the annulus. Model tests of the pipeline in the case, using polyethylene foam as an element that compensates for the expansion of water during freezing, showed complete exclusion of deformation of the pipeline during freezing. The developed design has shown its efficiency and possibility of widespread use to increase the reliability of pipelines in protective cases operating at temperature below freeezing point.