The Effect of Periodic Inspection and Safety Criteria on the Service Life of Steel Construction Conveyors

Abstract

Steel construction structures are seen in many different applications in our country and in the world. However, the periodic maintenance of these steel construction products is explained by national and international laws and regulations. According to the relevant regulation in our country, it is obligatory to carry out periodic inspections of these constructive structures, which are referred to as machinery and equipment, once a year. As in many facilities, it is obvious that these structures are the main elements of the facility and will be used throughout the life of the facility. It is not clear under which conditions these structures, which are generally produced using structural steels and which are connected by welding or bolts, will be examined in the periodic inspections. As a result of the research on the lifetime of general structural steels, it has been proved by many researchers that these structures have an infinite life if they reach the number of million repetitions. However, the life of welding or bolts, which are the connecting elements of the structure, remains uncertain. In this study, accident breaking studies were carried out by detailing the damage due to a tragic accident in a steel construction that has served for about 36 years. By keeping company and personal information confidential, the steel structure and bolt connections of the construction were examined in terms of strength, hardness and microstructure, and the results were detailed.

Keywords

• Structural Steel
• Service Life
• Periodic Inspection

References

1. [1] T. Żur, Belt conveyors in mining, Śląsk Publishers, Katowice, 1979
2. [2] Miriam A., Anna G., Daniela M., Measurement and Simulation of Impact Wear Damage to Industrial Conveyor Belts, Wear 2016 368, 400 - 407.
3. [3] V.V. Poovakaud, C. J. Peña, R. Talemi, S. Coppieters, D. Debruyne, Assessment of fretting fatigue in high strength steel bolted connections with simplified Fe modelling techniques, Tribology International, 143, 2020.
4. [4] M. Sundar, S. Thirumalai Kumaran, Rendi Kurniawan, Farooq Ahmed, Investigating the corrosion behaviour of conveyor chain pin and link, Materials Today: Proceedings, 50, 2022, 855-860.
5. [5] W. Bochnowski, Ł. Szyller, M. Osetek, Damage characterization of belt conveyor made of the 330Nb alloy after service in a carburizing atmosphere in a continuous heat treatment furnace, Engineering Failure Analysis, 103, 2019, 173-183.
6. [6] M.A. Khattak, S. Zaman, S. Kazi, H. Ahmed, H.M. Habib, H.M. Ali, M.N. Tamin, Failure investigation of welded 430 stainless steel plates for conveyor belts, Engineering Failure Analysis, 116, 2020.
7. [7] D. R. H. Jones, Fatigue failures of welded conveyor drums, Engineering Failure Analysis, 12, 1995, 59-69. [8] BS Dhillon Mining equipment reliability Springer 2008 p57.
8. [9] S. Dunn, Optimizing production scheduling for maximum plant utilization and minimum downtime: the reliability revolution. Presented at the Dollar Driven Mining Conference, Perth, Australia, July 1997.

9. [10] The Basics of Conveyor Maintenance, [Online] Available: https://limblecmms.com/blog/conveyor-maintenance-plan/ [Accessed: Oct. 27, 2022]
10. [11] TS 3964 ISO 5048, Sürekli Mekanik Taşıma Donanımları – Taşıyıcı Makaralı Bant Konveyörler - Çalışma Gücünün Ve Çekme Kuvvetlerinin Hesaplanması, TSE, 2004.
11. [12] C. Wegst, M. Wegst, Stahlschlussel, Verlag Stahlschlussel Wegst GmbH, 2004
12. [13] Mine Planning and Equipment Selection 2004: Proceedings of the Thirteenth International Symposium on Mine Planning and Equipment Selection, Wroclaw, Poland, 1-3 September 2004, 484
13. [14] ISO 898-1 / 898-2 Gr.8.8, Properties of Grade 8.8 Bolts and Nut, ISO, 2009.
14. [15] ISO 898-1 / 898-2 Gr.10.9, Properties of Grade 10.9 Bolts and Nut, ISO, 2009.
15. [16] C.P. Gardiner, R.E. Melchers, Corrosion of mild steel by coal and iron ore, Corrosion Science 44 (2002) 2665–2673.