PSI - Issue 33

Radzeya Zaidi et al. / Procedia Structural Integrity 33 (2021) 1181–1186 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

1186

6

0.6-0.8 high

High

0.8-1.0 very high

a=3.5 mm, 2c=200 mm, R=0.8, R=0.7

Very High

3. Conclusions Based on presented concept and results, one can conclude the following: • The simple engineering analysis, based on analytical calculation of fracture mechanics parameters, is useful for risk assessment of components with relatively simple geometry, such as rig oil pipe. • Even if the absolute values are overconservative, one can use analytical method to evaluate the effect of some parameters like stress ratio and material properties, on structural integrity and life. Acknowledgements T his work has been supported by Croatian Science Foundation under the project number IP-2019-04-3607 and Serbian Ministry for Education, Science and Technological Development by contracts 451-03-9/2021-14/200105 and 451-03-9/2021-14/200213. References [1] S Kirin, A Sedmak, R Zaidi, A Grbović, Ž Šarkočević, Comparison of experimental, numerical and analytical risk assessment of oil drilling rig welded pipe based on fracture mechanics parameters, Engineering Failure Analysis 114, 104600 [2] A Sedmak, M Arsić, Ž Šarkoćević, B Medjo, M Rakin, D Arsić, V Lazić, Remaining strength of API J55 steel casing pipes damaged by corrosion, International Journal of Pressure Vessels and Piping 188, 104230 [3] R Zaidi, A Sedmak, S Kirin, A Grbovic, W Li, LL Vulicevic, Z Sarkocevic, Risk assessment of oil drilling rig welded pipe based on structural integrity and life estimation, Engineering Failure Analysis 112, 104508 [4] A Sedmak, A Grbović, S Kirin, Ž Šarkočević, R Zaidi, Material Effects on Risk Assessment of Residual Life of Oil Drilling Rig Pipe, Procedia Structural Integrity 28, 1315 - 1320 [5] A Sedmak, S Kirin, I Martic, L Jeremic, I Vucetic, T Golubovic, S A Sedmak , Structural integrity and life assessment of pressure vessels - risk based approach, Lecture Notes in Networks and SystemsVolume 153, Pages 274 – 2932021 [6] S Kirin, L Jeremić, A Sedmak, I Martić, S Sedmak, I Vučetić, T Golubović, Risk based analysis of RHPP penstock structural integrity, Frattura ed Integrità Strutturale 14 (53), 345 - 352 [7] T Golubović, A Sedmak, V Spasojević Brkić, S Kirin, I Rakonjac, Novel risk based assessment of pressure vessels integrity, Tehnički vjesnik 25 (3), 803 - 807 [8] I Vucetic, S Kirin, T Vucetic, T Golubovic, A Sedmak, Risk Analysis in the Case of Air Storage Tank Failure at RHPP Bajina Basta, S tructural Integrity and life, Vol. 18 (1), 3 - 6 [9] L Gajdoš , M Šperl, “Application of a fracture - mechanics approach to gas pipelines,” World Acad. Sci. Eng. Technol., vol. 73, no. 1, pp. 480 – 487, 2011. [10] A Keprate, R M Chandima Ratnayake, S. Sankararaman, “Minimizing hydrocarbon release from offshore piping by performing probabilistic fatigue life assessment,” Process Saf. Environ. Prot., vol. 106, pp. 34 – 51, 2017, doi: 10.1016/j.psep.2016.11.019. [11] R W Bourga, “Comparison of BS 7910 and API 579 - 1/ASME FFS - 1 solutions with regards to leak - before - break, Renaud, July 17 - 21, 2016, Vancouver, Br. Columbia, Canada PVP2016 - 63876, pp. 1 – 21, 2016. [12] R. Zaidi, Application of fracture mechanics parameters to residual life assessment of welded pipes exploitation under fatigue loading , University of Belgrade, Doctoral dissertation, 2021