INVESTIGATION OF THE EFFECT OF ADDING A SUPPORT SLEEVE TO A SIX-BOLT STEEL CIRCULAR PIPE CONNECTION CLIP ON MECHANICAL PROPERTIES

Öz

In this study, the effect of adding a support sleeve for a pipe connection with 6 bolts of equivalent distance was investigated. The research was carried out with a package program that is widely used in finite element analysis. The lip geometry used for bolts and connection has been simplified for ease of analysis. As a material, steel with standard features was used in the models and static analyses were made. Factors that the connection may encounter most in operating conditions; The axial tension between the pipes, the internal pressure within the pipe and the bending effect with an applied moment were investigated. In addition, the pre-loading condition applicable to the bolts was applied as displacement to all 6 bolts for tensile condition and to 3 bolts subjected to tension for bending condition. In the results, the connection region was determined as the region where the stresses were concentrated under all different loading conditions and it was seen that the applied support sleeve did not show any benefit in reducing the stresses. It was determined that the preload applied to the bolts increased the stresses. Preloading only had a limited positive effect on the bending behaviour.

Anahtar Kelimeler

• pipe connection
• bolt
• stress
• internal pressure

Kaynakça

1. Jun, J. H., Park, J. K., Bae, C. H. (2020). Factors affecting steel water-transmission pipe failure and pipe-failure mechanisms. Journal of Environmental Engineering, 146(6), 04020034.
2. Tasbihgoo, F., Caffrey, J. P., Masri, S. F. (2004). Nonlinear finite element analysis of a threaded pipe connection. ASME/JSME 2004 Pressure Vessels and Piping Conference, 173-179.
3. Wittenberghe, J. V., Baets, P. D., Waele, W. D., Galle, T., Bui, T. T., Roeck, G. D. (2011). Design characteristics that improve the fatigue life of threaded pipe connections. Sustainable Construction And Design, 2(2), 334-341.
4. Shahani, A. R., Sharif, S. M. H. (2009). Contact stress analysis and calculation of stress concentration factors at the tool joint of a drill pipe. Materials and Design, 30, 3615–3621.
5. Zaghi, A. E., Saiid, S. M. (2011). Bearing and shear failure of pipe-pin hinges subjected to earthquakes. American Society of Civil Engineers, 16(3), 340-350
6. Barsoum, I., Khalaf, A.M. (2015). Evaluation of a pipe-flange connection replacing fusion welding. Procedia Engineering, 130, 446-452.
7. Stevenson, M. E., Iwand, H. C., McDougall, J. L., Umberger, P. D., Wilkinson, J. A., Kenner, M. T., Stone, D. H. (2017). Failure analysis of an aluminum chiller pipe by experimental simulation and stress analysis. J Fail. Anal. and Preven., 17, 1090–1098.
8. Ren, F., Li, B., Tang, X. (2018). Failure analysis of collecting pipe head used in ammonia refrigerating system. IOP Conf. Series: Materials Science and Engineering, 382, 022101.

9. Zhao, K., Jiang, N., Zhou, C., Li, H., Cai, Z., Zhu, B. (2022). Dynamic behavior and failure of buried gas pipeline considering the pipe connection form subjected to blasting seismic waves. Thin-Walled Structures, 170, 108495.
10. Winkler, D., Haltmeier, M., Kleidorfer, M., Rauch, W., Tscheikner-Gratl, F. (2018). Pipe failure modelling for water distribution networks using boosted decision trees. Structure and Infrastructure Engineering, 14(10), 1402-1411.
11. Zhang, X., Hou, L., Li, H., Qi, G., Qi, D. (2021). Leakage analysis of steel wire reinforced polyethylene composite pipe used for waste water transportation. Engineering Failure Analysis, 130, 105750.
12. Zhang, Y., Cheng, Z., Jia, Z. (2020). Failure loads analysis of corroded pipe repaired by composite material under tension and internal pressure. Journal of Marine Engineering & Technology. doi: 10.1080/20464177.2020.1826675