Zapukhliak V. Improvement of Technique and Technology of Operation on Reconstruction and Pipeline Maintenance

The thesis is devoted to the improvement of technical means and technologies of hot tapping into a running oil and gas pipe-line under the pressure at the stages of reconstruction and maintenance. It is developed and analyzed the process of forming of temperature field from a circular motion of welding arc as a heat source in the wall of running pipeline. It is conducted the experimental research of mechanical characteristic dependence of pipe steel on temperature. On the basis of the conducted theoretical and experimental researches, the recommendation on the improvement of hot tapping into a running pipeline under the pressure is made. Industrial testing results confirm high effectiveness of the conducted research and developments. It is developed and approved an industrial strategy, named "Typical Calculations of the Reliability Index of Oil and Gas Supply Systems"