... a negative impact on the resistance of the pipeline to destruction. Materials and methods Researches were undertaken on gas pipes of different diameters. A special stand was made for loading pipes by the combined influence of internal pressure and torsion. To assess the bearing capacity of pipe with bundles, was made a pipe lash. For laboratory studies of metal pipes was performed electron microscopy. Results The combined eff of internal pressure and torsion loads led to increase the bundle size ...

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