A Study on the Influence of aging of the Butt-welded PE100 SDR11 on Shore A Hardness and Tensile Strength
Received: 16 November 2023 | Revised: 2 December 2023 | Accepted: 11 December 2023 | Online: 17 December 2023
Corresponding author: Dragos Valentin Iacob
Abstract
This paper presents the results of an experimental study on the influence of aging on the shore A hardness and tensile strength of butt-welded PE100 SDR11 pipeline joints with a nominal diameter of 125 mm and wall thickness of 11.40 mm used in natural gas distribution transportation. For the experimental determination, 12 samples were taken from the body of the pipe, 9 of which were taken from the area of the butt-welded joint. The test tubes were divided into 3 groups of 4 pieces each (1 unwelded test tube and 3 welded test tubes). Using the Arrhenius method, the test tubes in 2 groups were given artificial aging treatments of 10 and 20 years. Subsequently, all 12 test tubes were tested for shore A hardness and tensile strength. For the welded samples, an increase in tensile strength was observed with increasing aging time by 6.5% for the 10-year aged samples and by 6.16% for the 20-year aged samples. For the unwelded samples, the tensile strength decreased by 3.57% for 10-year aging and increased by 5.84% for 20-year aging. Artificial aging of 10 and 20 years of natural gas transmission and distribution pipelines did not considerably influence the Shore A hardness values, as they were in the medium/soft hardness range.
Keywords:
polyethylene, pressure welding, tensile, shore A hardnessDownloads
References
V. Aluchi, "Cercetări privind caracteristicile de exploatare ale conductelor din polietilenă utilizate la distribuţia gazelor naturale," Ph.D. dissertation, Petroleum-Gas University, Ploiesti, Romania, 2013.
M. Minescu and D. G. Zisopol, Sudarea țevilor şi fitingurilor din polietilenă de înaltă densitate (HDPE Pipe & Fittings Welding). Ploiesti, Romania: Editura Universităţii Petrol-Gaze din Ploieşti, 2021.
D. G. Zisopol and A. Dumitrescu, Materiale şi tehnologii primare. Aplicații practice și studii de caz. Ploiesti, Romania: Editura Universităţii Petrol-Gaze din Ploieşti, 2005.
D. G. Zisopol and A. Dumitrescu, Ecotehnologie. Studii de caz. Ploiesti, Romania: Editura Universităţii Petrol-Gaze din Ploieşti, 2021.
D. G. Zisopol, A. Dumitrescu, and C. N. Trifan, Ecotehnologie: Noţiuni teoretice, aplicaţii şi studii de caz. Ploiesti, Romania: Editura Universităţii Petrol-Gaze din Ploieşti, 2010.
D. G. Zisopol and M. J. Săvulescu, Bazele tehnologiei. Ploiesti, Romania: Editura Universităţii Petrol-Gaze din Ploieşti, 2003.
M. J. Săvulescu and D. G. Zisopol, Tehnologii industriale şi de construcţi. Ploiesti, Romania: Editura Universităţii Petrol-Gaze din Ploieşti, 2002.
D. G. Zisopol Ingineria valorii. Ploiesti, Romania: Editura Universităţii Petrol-Gaze din Ploieşti, 2004.
D. G. Zisopol, Tehnologii industriale și de construcții, Aplicații practice și studii de caz. Ploiesti, Romania: Editura Universităţii Petrol-Gaze din Ploieşti, 2003.
M. J. Săvulescu, D. G. Zisopol, and I. Nae, Bazele tehnologiei materialelor. Îndrumar de lucrări practice. Ploiesti, Romania: Editura Universităţii Petrol-Gaze din Ploieşti, 1997.
D. G. Zisopol, A. Dumitrescu, M. Minescu, and A. Diniță, "New materials intended for use within natural gas installations and quality testing procedures," Journal of Engineering Sciences and Innovation, vol. 7, no. 2, pp. 241–252, Jun. 2022.
D. G. Zisopol, M. Minescu, and D. V. Iacob, "A Theoretical-Experimental Study on the Influence of FDM Parameters on the Dimensions of Cylindrical Spur Gears Made of PLA," Engineering, Technology & Applied Science Research, vol. 13, no. 2, pp. 10471–10477, Apr. 2023.
M. Stan and D. G. Zisopol, "Modeling and Optimization of Piston Pumps for Drilling," Engineering, Technology & Applied Science Research, vol. 13, no. 2, pp. 10505–10510, Apr. 2023.
D. G. Zisopol, M. Tănase, and A. I. Portoacă, "Innovative Strategies for Technical-Economical Optimization of FDM Production," Polymers, vol. 15, no. 18, Jan. 2023, Art. no. 3787.
M. Minescu, A. Dinita, D. Zisopol, and A. Olteanu, "Experimental investigations on fiber glass composite pipes with application for oil, gas and geothermal well completions," EEK, vol. 138, no. 11, pp. 37–41, 2021.
D. G. Zisopol, A. I. Portoaca, and M. Tanase, "Dimensional Accuracy of 3D Printed Dog-bone Tensile Samples: A Case Study," Engineering, Technology & Applied Science Research, vol. 13, no. 4, pp. 11400–11405, Aug. 2023.
D. G. Zisopol, A. I. Portoaca, I. Nae, and I. Ramadan, "A Comparative Analysis of the Mechanical Properties of Annealed PLA," Engineering, Technology & Applied Science Research, vol. 12, no. 4, pp. 8978–8981, Aug. 2022.
A. Portoaca, I. Nae, D. G. Zisopol, and I. Ramadan, "Studies on the influence of FFF parameters on the tensile properties of samples made of ABS," IOP Conference Series: Materials Science and Engineering, vol. 1235, no. 1, Nov. 2022, Art. no. 012008.
D. G. Zisopol, I. Nae, A. I. Portoaca, and I. Ramadan, "A Theoretical and Experimental Research on the Influence of FDM Parameters on Tensile Strength and Hardness of Parts Made of Polylactic Acid," Engineering, Technology & Applied Science Research, vol. 11, no. 4, pp. 7458–7463, Aug. 2021.
A. Hellati and S. Boufassa, "Evaluation of the Role of Ethylene Vinyl Acetate on the Thermo-Mechanical Properties of PET/HDPE Blends," Engineering, Technology & Applied Science Research, vol. 12, no. 6, pp. 9546–9550, Dec. 2022.
S. Vlase, M. Marin, M. L. Scutaru, D. D. Scărlătescu, and C. Csatlos, "Study on the Mechanical Responses of Plastic Pipes Made of High Density Polyethylene (HDPE) in Water Supply Network," Applied Sciences, vol. 10, no. 5, Jan. 2020, Art. no. 1658.
T. M. A. A. El-Bagory, M. Y. A. Younan, and H. E. M. Sallam, "Mechanical Behavior of Welded and Un-Welded Polyethylene Pipe Materials," presented at the ASME 2013 Pressure Vessels and Piping Conference, Paris, France, Jul. 2013.
I. Ramadan and M. Tanase, "Experimental Study Regarding the Influence of Welding Parameters on the Mechanical Behaviorof High Density Polyethylene Pipes," Materiale Plastice, vol. 57, no. 4, pp. 209–215, Jan. 2021.
B. Zhao, S. Zhang, C. Sun, J. Guo, Y. X. Yu, and T. Xu, "Aging behaviour and properties evaluation of high-density polyethylene (HDPE) in heating-oxygen environment," IOP Conference Series: Materials Science and Engineering, vol. 369, no. 1, Feb. 2018, Art. no. 012021.
"EN 1555-1:2021 - Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 1: General." CEN, 2021.
"ISO 527-2:2012. Plastics Determination of tensile properties. Part 2: Test conditions for moulding and extrusion plastics." 2012.
"ISO 868:2003. Plastics and ebonite. Determination of indentation hardness by means of a durometer (Shore hardness)." 2003.
A. S. Dorobanțu, "Studiu privind evaluarea conductelor din PEHD utilizate la transportul și distribuția gazelor naturale," M. S. thesis, Petroleum-Gas University, Ploiești, România, Ploiesti, Romania, 2022.
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Copyright (c) 2023 Dragos Gabriel Zisopol, Mihail Minescu, Dragos Valentin Iacob
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