Abstract
At present gas, like oil, is the main source of energy for many consumers in the world. In recent decades, the role and importance of natural gas in the energy balance of the world economy has steadily increased due to its high efficiency as an energy resource and raw material for industry. It is clear that the intensive construction and reconstruction of steel gas pipelines will continue, and great attention will be paid to maintaining them in working and technically viable condition. Therefore, the aim of this study is to develop methods for strengthening existing gas transmission pipelines. Theoretical studies were carried out in the ANSYS software complex with comparison of obtained values with the results of experimental studies. As a result, it was found that different temperature loads (-400C, -100C, +200C and +500C) the proposed methods reduce the propagation of crack in longitudinal stress from 2 to 5 times depending on the geometric parameters and temperature effects, a transverse house 1.9 times. The results of this study will benefit production in operation of gas transmission pipelines in the investigation of extended failure prevention.