Safety Of Pipeline Systems Research Articles

Operation Simulation for a Check Valve Used in High-Performance Systems

This research aims to increase the reliability and safety of pipeline systems by creating an improved model range of Butterfly Check Valves (BCV). Pipes through which working fluids are transported, parts related to shut-off and control valves, control measuring instruments, fasteners, anticorrosion elements, and other structural components are the main elements that make up pipelines. Fittings can be of different types; BCV refers to protective ones. These devices protect pipelines by disconnecting the working line in the event of a sudden change in the transported fluid parameters (pressure, flow direction), resulting in the failure of the entire system. Based on an analysis of the key requirements for valves, namely reliability, tightness of a closed system, ensuring safe operation, and analysis of existing BCVs, the design of the presented valve was created. Improved overall dimensions and tightness, both in the open and closed states, as opposed to the existing analogs, are distinctive features of the developed design of butterfly check valves. To confirm the results, the authors, using the finite element method, calculated the stress–strain state of the structure under normal conditions and with regard to the maximum temperatures of the working fluid. The reliability indicators of the developed elements were also calculated to confirm their operability. As a result, it was concluded that after the developed valves have passed acceptance tests, the research findings will make it possible to increase the reliability and safety of the valve itself and the entire pipeline system by introducing these structures into enterprises. Doi: 10.28991/CEJ-2023-09-12-017 Full Text: PDF

OIL TRUNK PIPELINES RELIABILITY AND SAFETY

Background Reliability and safety of oil trunk pipelines are ensured by the development and application of scientifically proven technical and technological solutions at the design, construction and operation stages. The basics of reliability and safety of oil trunk pipelines during design are laid by the adoption of technical and technological solutions using calculation methods that fully reflect the actual operating conditions. Strict adherence to scientifically based design decisions during construction and operation ensures the reliability and safety of pipeline systems. Taking into account the fact that the reliability and safety of oil trunk pipelines are largely determined by the level of mechanical stress in the structural elements that bear the main load and the nature of the change in this level, technical and technological solutions should be aimed at reducing stress levels and ensuring the stationary nature of the product transfer regime, on which the nature depends stress changes. At the same time, the quality of these solutions is evaluated by ensuring minimum stresses and the minimum frequency of their changes in structures under the conditions of the loads assigned to them. Changes in the situation near facilities and structures of oil trunk pipelines during their long-term operation, as well as scientific and technical achievements of recent years in the reliability and safety of pipeline systems, determine the need and allow the adoption of current measures to maintain the efficiency of operation of oil trunk pipelines. During the technical operation of the oil trunk pipelines, repairs and reconstruction of structures are carried out in order to maintain reliability and safety in the changed conditions. A comprehensive safety indicator is the risk of accidents. High technical and economic indicators of trunk pipelines are achieved by reducing the risk of accidents. In order to further successfully develop the network of oil trunk pipelines, it is necessary to develop technical and technological solutions to reduce technological risks, ensure the reliability and safety of the structure. Aims and Objectives Theoretical and experimental studies of the stress-strain state of underground pipelines during their operation, analysis of the consequences of accidents on the linear part of the oil trunk pipelines. Results Analytical dependences of the influence parameters of operational loads, geometric characteristics of pipes, technical solutions for the construction of the pipeline, the properties of the environment interacting with the pipeline, on the stress-strain state of the underground pipeline are obtained. Methods for ensuring the reliability and safety of trunk pipelines based on technical and technological solutions are proposed.