Structural life assessment of oil rig pipes made of api j55 steel by high frequency welding
Abstract
Structural life of welded pipes made of API J55 steel by high-frequency (HF) welding has been evaluated. Experimental tests of base metal mechanical properties, including fatigue properties, were conducted on pipes after 70.000 hours of service in an oil drilling rig. The fatigue crack growth rate and fatigue threshold is obtained using the pre-cracked Charpy specimens. The number of cycles to the final fracture is then calculated using initial and critical crack depths. Based on the number of cycles to the final fracture and the remaining fatigue lifetime of pipes with axial outer surface crack are determined. It was shown that the remaining fatigue lifetime is more sensitive to the changes in the stress range than to the initial crack depth.
Keywords:
oil rig pipes / number of cycles to failure N-(sic) / axial surface crackSource:
Tehnički vjesnik, 2013, 20, 6, 1091-1094Publisher:
- Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
Funding / projects:
- Development of new revitalization methodologies for hydro power plant turbine and hydro-mechanical equipment in relation to causes of material degradation (RS-MESTD-Technological Development (TD or TR)-35002)
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Institution/Community
Inovacioni centarTY - JOUR AU - Lazić-Vulicević, Ljubica AU - Arsić, Miodrag AU - Šarkočević, Živče AU - Sedmak, Aleksandar AU - Rakin, Marko PY - 2013 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1746 AB - Structural life of welded pipes made of API J55 steel by high-frequency (HF) welding has been evaluated. Experimental tests of base metal mechanical properties, including fatigue properties, were conducted on pipes after 70.000 hours of service in an oil drilling rig. The fatigue crack growth rate and fatigue threshold is obtained using the pre-cracked Charpy specimens. The number of cycles to the final fracture is then calculated using initial and critical crack depths. Based on the number of cycles to the final fracture and the remaining fatigue lifetime of pipes with axial outer surface crack are determined. It was shown that the remaining fatigue lifetime is more sensitive to the changes in the stress range than to the initial crack depth. PB - Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek T2 - Tehnički vjesnik T1 - Structural life assessment of oil rig pipes made of api j55 steel by high frequency welding EP - 1094 IS - 6 SP - 1091 VL - 20 UR - https://hdl.handle.net/21.15107/rcub_technorep_2465 ER -
@article{ author = "Lazić-Vulicević, Ljubica and Arsić, Miodrag and Šarkočević, Živče and Sedmak, Aleksandar and Rakin, Marko", year = "2013", abstract = "Structural life of welded pipes made of API J55 steel by high-frequency (HF) welding has been evaluated. Experimental tests of base metal mechanical properties, including fatigue properties, were conducted on pipes after 70.000 hours of service in an oil drilling rig. The fatigue crack growth rate and fatigue threshold is obtained using the pre-cracked Charpy specimens. The number of cycles to the final fracture is then calculated using initial and critical crack depths. Based on the number of cycles to the final fracture and the remaining fatigue lifetime of pipes with axial outer surface crack are determined. It was shown that the remaining fatigue lifetime is more sensitive to the changes in the stress range than to the initial crack depth.", publisher = "Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek", journal = "Tehnički vjesnik", title = "Structural life assessment of oil rig pipes made of api j55 steel by high frequency welding", pages = "1094-1091", number = "6", volume = "20", url = "https://hdl.handle.net/21.15107/rcub_technorep_2465" }
Lazić-Vulicević, L., Arsić, M., Šarkočević, Ž., Sedmak, A.,& Rakin, M.. (2013). Structural life assessment of oil rig pipes made of api j55 steel by high frequency welding. in Tehnički vjesnik Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek., 20(6), 1091-1094. https://hdl.handle.net/21.15107/rcub_technorep_2465
Lazić-Vulicević L, Arsić M, Šarkočević Ž, Sedmak A, Rakin M. Structural life assessment of oil rig pipes made of api j55 steel by high frequency welding. in Tehnički vjesnik. 2013;20(6):1091-1094. https://hdl.handle.net/21.15107/rcub_technorep_2465 .
Lazić-Vulicević, Ljubica, Arsić, Miodrag, Šarkočević, Živče, Sedmak, Aleksandar, Rakin, Marko, "Structural life assessment of oil rig pipes made of api j55 steel by high frequency welding" in Tehnički vjesnik, 20, no. 6 (2013):1091-1094, https://hdl.handle.net/21.15107/rcub_technorep_2465 .