Weld Geometry Defect Influence On Boiler Tube Structural Integrity
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Damage of boiler tubes is a very serious problem in many utilities worldwide, including even in the most advanced countries. Preserve of boiler tube integrity present major part in maintenance programs centered to achievement of high levels of availability and reliability of thermal power plants. This is due to a very specific and complex interconnection of design and operating characteristics of the boiler unit. Based on the results of numerous boiler tube damages investigation performed on domestic thermal power plants it is concluded that the initiation of different damage mechanism was strongly influenced by tube weld geometry defects. In this paper particular attention was dedicated to this not well documented problem. Structural integrity of the boiler tubes are greatly affected by the weld excessive root penetration (melt-through) on the tube inner surface. This type of weld geometry defect, which occured often on boiler tubing system,
present local flow disrupter and also very... strong stress riser. In the vicinity and donwnstream of excessive root penetration type disrupter initiation of different damage mechanisms (erosive and corrrosive wear, underdeposit corrosion, stress corrosion, corrosion fatigue) occured due to working fluid nucleate boiling destabilization (eveporator), or due to turbulent flow (superheater and
reheater), followed by intensive suspended solids deposition.
Ključne reči:
Weld defect / Geometry defect / Structural integrity / Thermal power plant / Boiler tubes / Fracture mechanismIzvor:
Conference: IIW International Congress “Welding and Joining Technologies for a Sustainable Development and Environment”, The 1st South-East European Welding Congress, 2006Izdavač:
- The National R&D Institute for Welding and Material Testing - ISIM Timişoara
URI
https://www.researchgate.net/publication/236626947_Weld_Geometry_Defect_Influence_on_Boiler_Tube_Structural_Integrityhttps://machinery.mas.bg.ac.rs/handle/123456789/5546
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Institucija/grupa
Mašinski fakultetTY - CONF AU - Đukić, Miloš AU - Šijački Žeravčić, Vera AU - Bakić, Gordana AU - Rajičić, Bratislav AU - Anđelić, Biljana PY - 2006 UR - https://www.researchgate.net/publication/236626947_Weld_Geometry_Defect_Influence_on_Boiler_Tube_Structural_Integrity UR - https://machinery.mas.bg.ac.rs/handle/123456789/5546 AB - Damage of boiler tubes is a very serious problem in many utilities worldwide, including even in the most advanced countries. Preserve of boiler tube integrity present major part in maintenance programs centered to achievement of high levels of availability and reliability of thermal power plants. This is due to a very specific and complex interconnection of design and operating characteristics of the boiler unit. Based on the results of numerous boiler tube damages investigation performed on domestic thermal power plants it is concluded that the initiation of different damage mechanism was strongly influenced by tube weld geometry defects. In this paper particular attention was dedicated to this not well documented problem. Structural integrity of the boiler tubes are greatly affected by the weld excessive root penetration (melt-through) on the tube inner surface. This type of weld geometry defect, which occured often on boiler tubing system, present local flow disrupter and also very strong stress riser. In the vicinity and donwnstream of excessive root penetration type disrupter initiation of different damage mechanisms (erosive and corrrosive wear, underdeposit corrosion, stress corrosion, corrosion fatigue) occured due to working fluid nucleate boiling destabilization (eveporator), or due to turbulent flow (superheater and reheater), followed by intensive suspended solids deposition. PB - The National R&D Institute for Welding and Material Testing - ISIM Timişoara C3 - Conference: IIW International Congress “Welding and Joining Technologies for a Sustainable Development and Environment”, The 1st South-East European Welding Congress T1 - Weld Geometry Defect Influence On Boiler Tube Structural Integrity UR - https://hdl.handle.net/21.15107/rcub_machinery_5546 ER -
@conference{ author = "Đukić, Miloš and Šijački Žeravčić, Vera and Bakić, Gordana and Rajičić, Bratislav and Anđelić, Biljana", year = "2006", abstract = "Damage of boiler tubes is a very serious problem in many utilities worldwide, including even in the most advanced countries. Preserve of boiler tube integrity present major part in maintenance programs centered to achievement of high levels of availability and reliability of thermal power plants. This is due to a very specific and complex interconnection of design and operating characteristics of the boiler unit. Based on the results of numerous boiler tube damages investigation performed on domestic thermal power plants it is concluded that the initiation of different damage mechanism was strongly influenced by tube weld geometry defects. In this paper particular attention was dedicated to this not well documented problem. Structural integrity of the boiler tubes are greatly affected by the weld excessive root penetration (melt-through) on the tube inner surface. This type of weld geometry defect, which occured often on boiler tubing system, present local flow disrupter and also very strong stress riser. In the vicinity and donwnstream of excessive root penetration type disrupter initiation of different damage mechanisms (erosive and corrrosive wear, underdeposit corrosion, stress corrosion, corrosion fatigue) occured due to working fluid nucleate boiling destabilization (eveporator), or due to turbulent flow (superheater and reheater), followed by intensive suspended solids deposition.", publisher = "The National R&D Institute for Welding and Material Testing - ISIM Timişoara", journal = "Conference: IIW International Congress “Welding and Joining Technologies for a Sustainable Development and Environment”, The 1st South-East European Welding Congress", title = "Weld Geometry Defect Influence On Boiler Tube Structural Integrity", url = "https://hdl.handle.net/21.15107/rcub_machinery_5546" }
Đukić, M., Šijački Žeravčić, V., Bakić, G., Rajičić, B.,& Anđelić, B.. (2006). Weld Geometry Defect Influence On Boiler Tube Structural Integrity. in Conference: IIW International Congress “Welding and Joining Technologies for a Sustainable Development and Environment”, The 1st South-East European Welding Congress The National R&D Institute for Welding and Material Testing - ISIM Timişoara.. https://hdl.handle.net/21.15107/rcub_machinery_5546
Đukić M, Šijački Žeravčić V, Bakić G, Rajičić B, Anđelić B. Weld Geometry Defect Influence On Boiler Tube Structural Integrity. in Conference: IIW International Congress “Welding and Joining Technologies for a Sustainable Development and Environment”, The 1st South-East European Welding Congress. 2006;. https://hdl.handle.net/21.15107/rcub_machinery_5546 .
Đukić, Miloš, Šijački Žeravčić, Vera, Bakić, Gordana, Rajičić, Bratislav, Anđelić, Biljana, "Weld Geometry Defect Influence On Boiler Tube Structural Integrity" in Conference: IIW International Congress “Welding and Joining Technologies for a Sustainable Development and Environment”, The 1st South-East European Welding Congress (2006), https://hdl.handle.net/21.15107/rcub_machinery_5546 .