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The paper presents the results of studying the causes of emergency failure of a gas pipeline with a diameter of 377 mm and a wall thickness of 6 mm (spiral-welded pipe). The gas pipeline has been operated for more than 35 years. In the process of the study, metal-fractographic analysis and mechanical tests were carried out. As a result, it has been established that the pipe material corresponds to the design solutions and that the overload is not associated with the growth of internal pressure. The reason for the force overload in the fracture zone is the ground instability caused by seasonal temperature fluctuations. The analysis of the causes of emergency failure makes it possible to improve the reliability of the pipeline through measures aimed at reducing off-design loads.

The state of pipeline transport and the system for its provision with nondestructive testing facilities were analyzed. A number of measures that, in the authors' opinion, must contribute to the operational safety and reliability of pipeline transport in Russia were proposed.

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