This article is devoted to the issues related to energy saving in extraction of petroleum with high viscosity and bitumen. The author identifies the shortcomings of existing methods of thermal insulation of steam lines. The article contains the calculation of the specific heat loss of steam pipelines with polyurethane insulation. The calculation is considering an influence of the thermal destruction on the coefficient of transcalency of insulation.

Keywords: steam pipe, heat losses, polyurethane insulation, mineral wool, thermal destruction, petroleum-producing