Abstract
One of the main lines in ensuring reliable and safe operation of oil and gas pipelines is the use of constructive solutions based on calculations reflecting the actual conditions of their work. The choice of design solutions should be implemented so as to ensure a minimum level of stresses in the bearing members of structures. Longitudinal-transverse displacements of underground pipelines are characteristic for complex curved sections under the impact of a positive temperature differential. A significant limitation of the longitudinal-transverse movement of the pipeline under specified service loads is possible using weights and anchors. Limitation of longitudinal-transverse displacement of the pipeline can significantly reduce the level of longitudinal stresses in the pipeline and increase safety factor. In accordance with the requirements of SP 36.13330.2012 underground pipelines should be checked for strength and deformability in the longitudinal direction with determination of the total maximum longitudinal stress taking into account longitudinal and transverse movement. Aims and Objectives To obtain analytical dependences of the total maximum longitudinal stress in the pipeline and its strength margins on operational loads and parameters of the weights. Methods Theoretical study of longitudinal-transverse displacement of weighted underground pipeline under the influence of positive temperature differential and internal pressure. Results The dependences of the total maximum longitudinal stress and the strength margins on the operational loads and parameters of the weights have been obtained.
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