Analysis of current state and integrity evaluation of the pipeline at hydro power plant "Pirot"
Апстракт
Hydro power plant Pirot, which was built in 1990, is an accumulation-derivative power plant, which consists of 2 above - ground vertical hydroelectric generating sets that contain Francis turbines with nominal power of 41,5 MW, manufactured in Czech Republic, a tunnel and a sunken pipeline with overall length of 2.030 m and diameter that ranges from 3.000 to 3.500 m. Pipes have been made of S275J2G3 steel. [1] Pipe wall is 22 mm thick. Maximum pressure of 2.5 MPa occurs in front of the turbine cover. [2]
Pipeline has been designed and built without anchor blocks at curvatures, which is rarity elsewhere. Geodetic measurements have been conducted permanently from the day the assembly was finished and pipeline was put into service, both when pipeline is empty and unloaded by hydrostatic pressure and when it is full. Analysis of obtained data regards the movements along the pipeline route showed that from year 2003 there are significantly higher differences in movements comparing the situ...ations when the pipeline is full and when it is empty in comparison with the previous period.
Those differences primarily refers to tangential movements of vertices marked with numbers 6, 7 and 8, which, compared to the period until year 2002, are in the range from 3 mm for vertex 8 to 5 mm for vertex 6. Apart from geodetic measurements, the measurement of pipe diameter in 2 directions is also being carried out permanently. Those data show that from year 2003. the diameter in horizontal direction started to increase significantly, while at the same time the diameter in vertical direction started to decrease less significantly.
This paper contains the analysis of current state and integrity evaluation of the pipeline as a whole on the basis of results of non - destructive tests performed on the vital butt - welded joint in the curvature area at chainage 1+263 m (visual testing, magnetic particle testing, penetrant testing, ultrasonic testing, radiographic testing, metallographic replication testing).
Кључне речи:
hydroelectric generating set / crack / repair technology / pipeline integrityИзвор:
Proceedings of the 8th International Scientific-Professional Conference Design, Production and Service of Welded Constructions and Products – SBZ 2015, 2015, 5-12Издавач:
- Mechanical Engineering Faculty in Slavonski Brod
Финансирање / пројекти:
- Одрживост и унапређење машинских система у енергетици и транспорту применом форензичког инжењерства, еко и робуст дизајна (RS-MESTD-Technological Development (TD or TR)-35006)
- Развој нових методологија ревитализације турбинске и хидромеханичке опреме хидроелектрана у зависности од узрока деградације материјала (RS-MESTD-Technological Development (TD or TR)-35002)
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Arsić, Miodrag AU - Bošnjak, Srđan AU - Grabulov, Vencislav AU - Mladenović, M. AU - Minić, M. PY - 2015 UR - https://machinery.mas.bg.ac.rs/handle/123456789/5244 AB - Hydro power plant Pirot, which was built in 1990, is an accumulation-derivative power plant, which consists of 2 above - ground vertical hydroelectric generating sets that contain Francis turbines with nominal power of 41,5 MW, manufactured in Czech Republic, a tunnel and a sunken pipeline with overall length of 2.030 m and diameter that ranges from 3.000 to 3.500 m. Pipes have been made of S275J2G3 steel. [1] Pipe wall is 22 mm thick. Maximum pressure of 2.5 MPa occurs in front of the turbine cover. [2] Pipeline has been designed and built without anchor blocks at curvatures, which is rarity elsewhere. Geodetic measurements have been conducted permanently from the day the assembly was finished and pipeline was put into service, both when pipeline is empty and unloaded by hydrostatic pressure and when it is full. Analysis of obtained data regards the movements along the pipeline route showed that from year 2003 there are significantly higher differences in movements comparing the situations when the pipeline is full and when it is empty in comparison with the previous period. Those differences primarily refers to tangential movements of vertices marked with numbers 6, 7 and 8, which, compared to the period until year 2002, are in the range from 3 mm for vertex 8 to 5 mm for vertex 6. Apart from geodetic measurements, the measurement of pipe diameter in 2 directions is also being carried out permanently. Those data show that from year 2003. the diameter in horizontal direction started to increase significantly, while at the same time the diameter in vertical direction started to decrease less significantly. This paper contains the analysis of current state and integrity evaluation of the pipeline as a whole on the basis of results of non - destructive tests performed on the vital butt - welded joint in the curvature area at chainage 1+263 m (visual testing, magnetic particle testing, penetrant testing, ultrasonic testing, radiographic testing, metallographic replication testing). PB - Mechanical Engineering Faculty in Slavonski Brod C3 - Proceedings of the 8th International Scientific-Professional Conference Design, Production and Service of Welded Constructions and Products – SBZ 2015 T1 - Analysis of current state and integrity evaluation of the pipeline at hydro power plant "Pirot" EP - 12 SP - 5 UR - https://hdl.handle.net/21.15107/rcub_machinery_5244 ER -
@conference{ author = "Arsić, Miodrag and Bošnjak, Srđan and Grabulov, Vencislav and Mladenović, M. and Minić, M.", year = "2015", abstract = "Hydro power plant Pirot, which was built in 1990, is an accumulation-derivative power plant, which consists of 2 above - ground vertical hydroelectric generating sets that contain Francis turbines with nominal power of 41,5 MW, manufactured in Czech Republic, a tunnel and a sunken pipeline with overall length of 2.030 m and diameter that ranges from 3.000 to 3.500 m. Pipes have been made of S275J2G3 steel. [1] Pipe wall is 22 mm thick. Maximum pressure of 2.5 MPa occurs in front of the turbine cover. [2] Pipeline has been designed and built without anchor blocks at curvatures, which is rarity elsewhere. Geodetic measurements have been conducted permanently from the day the assembly was finished and pipeline was put into service, both when pipeline is empty and unloaded by hydrostatic pressure and when it is full. Analysis of obtained data regards the movements along the pipeline route showed that from year 2003 there are significantly higher differences in movements comparing the situations when the pipeline is full and when it is empty in comparison with the previous period. Those differences primarily refers to tangential movements of vertices marked with numbers 6, 7 and 8, which, compared to the period until year 2002, are in the range from 3 mm for vertex 8 to 5 mm for vertex 6. Apart from geodetic measurements, the measurement of pipe diameter in 2 directions is also being carried out permanently. Those data show that from year 2003. the diameter in horizontal direction started to increase significantly, while at the same time the diameter in vertical direction started to decrease less significantly. This paper contains the analysis of current state and integrity evaluation of the pipeline as a whole on the basis of results of non - destructive tests performed on the vital butt - welded joint in the curvature area at chainage 1+263 m (visual testing, magnetic particle testing, penetrant testing, ultrasonic testing, radiographic testing, metallographic replication testing).", publisher = "Mechanical Engineering Faculty in Slavonski Brod", journal = "Proceedings of the 8th International Scientific-Professional Conference Design, Production and Service of Welded Constructions and Products – SBZ 2015", title = "Analysis of current state and integrity evaluation of the pipeline at hydro power plant "Pirot"", pages = "12-5", url = "https://hdl.handle.net/21.15107/rcub_machinery_5244" }
Arsić, M., Bošnjak, S., Grabulov, V., Mladenović, M.,& Minić, M.. (2015). Analysis of current state and integrity evaluation of the pipeline at hydro power plant "Pirot". in Proceedings of the 8th International Scientific-Professional Conference Design, Production and Service of Welded Constructions and Products – SBZ 2015 Mechanical Engineering Faculty in Slavonski Brod., 5-12. https://hdl.handle.net/21.15107/rcub_machinery_5244
Arsić M, Bošnjak S, Grabulov V, Mladenović M, Minić M. Analysis of current state and integrity evaluation of the pipeline at hydro power plant "Pirot". in Proceedings of the 8th International Scientific-Professional Conference Design, Production and Service of Welded Constructions and Products – SBZ 2015. 2015;:5-12. https://hdl.handle.net/21.15107/rcub_machinery_5244 .
Arsić, Miodrag, Bošnjak, Srđan, Grabulov, Vencislav, Mladenović, M., Minić, M., "Analysis of current state and integrity evaluation of the pipeline at hydro power plant "Pirot"" in Proceedings of the 8th International Scientific-Professional Conference Design, Production and Service of Welded Constructions and Products – SBZ 2015 (2015):5-12, https://hdl.handle.net/21.15107/rcub_machinery_5244 .