Determination of the strength characteristics of a flanged joint with a flat gasket and loose retaining rings using a 3-point bending test

• Autorzy: Wróbel G.

Identyfikatory

DOI

10.5604/01.3001.0054.1595

• Języki publikacji: EN

Abstrakty

EN

Purpose To evaluate the effectiveness of determining the strength of loose rings made, polymer laminate, using a 3-point bending test of rectangular material specimens differing in form and dimensions from actual structural components. Design/methodology/approach The analysis carried out indicated a method of quantitative evaluation that could be directly related to the operating conditions of the rings. A similarity relation between the critical states of the ring and the specimens subjected to bending tests was presented. The assumed hypothesis of maximum tensile stresses of the rigid outer laminate layers provided the basis for formulating a criterion for the allowable loads on the rings, depending on the assembly tension of the bolts and the operating pressure in the installation. Findings The results of the bending tests, both in the elastic and failure range of the samples, confirmed the validity of the hypothesis about the proportionality of the breaking stresses in the ring and the bending, cuboid sample, made of a similar laminate. Practical implications The area of dimensional optimisation of the joint with regard to its strength and stiffness criterion is indicated. Originality/value The method provides a basis for evaluating the strength and tightness of a flange connection by means of experimental testing of specimens made of a laminate similar to the material of the rings. The results of the 3-point bend tests allow for the substitution of difficult tests of complex assembly components such as rings in a flanged connection, including the operating conditions of the connection in a pressure piping system.

Słowa kluczowe

EN

pipe; connection; clamping rings; ring stiffness; composites; bend test

PL

rura; połączenie; pierścienie zaciskowe; sztywność; kompozyty; test zginania

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2023
• Tom: Vol. 120, nr 2
• Strony: 59--65
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Wróbel G.

• Department of Theoretical and Applied Mechanics, Faculty of Mechanical Engineering, Silesian University of Technology, ul. Konarskiego 18A, 44-100 Gliwice, Poland

• https://orcid.org/0000-0002-7704-2466

Bibliografia

• [1] G. Wróbel, K. Walczak, Load condition analysis of pipe flange connection with gasket flat gasket and loose clamping rings, Journal of Achievements in Materials and Manufacturing Engineering 111/1 (2022) 5-17. DOI: https://doi.org/10.5604/01.3001.0015.8939
• [2] PN-EN 1092-2:1999: Flanges and their connections ‒ Sew-on flanges for pipes, fittings, couplings and equipment with PN marking ‒ Cast iron flanges (in Polish).
• [3] K. Rykaluk, G. Hotała, Bolt creep in flanged joints of power pipelines, Proceedings of the II Scientific and Technical Conference “Problems of exploitation, repairs and erection of power engineering structures,” Wrocław, 2000 (in Polish).
• [4] J. Rządkowski, R. Stęczniak, Flange connections in pipelines, Piping 4 (2004) 15-18 (in Polish).
• [5] PN-EN 1591-1:2014-04: Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation.
• [6] EN 1591-1:2001/PRA1: Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation method.
• [7] Collective work, Guidelines for safe seal usage ‒ Flanges and Gaskets, Publication No. 009/98, ESA/FSA, 1998.
• [8] D. Leń, L. Ślęczka, Design methods of bolted flange joints in tubular tensioned elements, PZITB Foundation "Engineering and Construction" 71/2 (2015) 91-94 (in Polish).
• [9] C.P. Timoshenko, Strength of Materials, Vol. 2, NAUGA, Moscow, 1965 (in Russian).
• [10] B. Szybiński, Problems of stress concentration in plates and shells - modeling and optimization, Cracow University of Technology Publishing House, Kraków, 2013 (in Polish).
• [11] Z. Brzoska, Strength of Materials, PWN, Warszawa, 1972 (in Polish).
• [12] P.W.M. Peters, T.W. Chou, On cross-ply cracking in glass and carbon fibre-reinforced epoxy laminates, Composites 18/1 (1987) 40-46. DOI: https://doi.org/10.1016/0010-4361(87)90006-1
• [13] B.A. Sjögren, L.A. Berglund, The effects of matrix and interface on damage in GRP cross-ply laminates, Composites Science and Technology 60/1 (2000) 9-21. DOI: https://doi.org/10.1016/S0266-3538(99)00096-2