Home / Vol. 24 (2019)

THERMAL ANALYSIS OF A CLAD PIPE USING SIMULATION

Hala Y. Hamad

Libya

DOI: 10.68482/prj.2019.24.009 · Published Dec 2019 · Section: Industrial · Pages: 81–87

Abstract

: Cladding is a process where one material covers another for protection or to obtain a specific property that is not exist in one of the two materials, but exist in the second material. The use of clad pipes provide an optimum and the cost-effectiveness solution when operating under highly corrosive conditions (crude with H2S, CO2, or in offshore area) or in high pressure operations. This paper introduces briefly the clad pipes and presents the results of thermal behaviour simulation of the clad pipe which utilized to perform a mesh sensitivity study. A (10ʺ) Stainless Steel clad pipe, which consists of a thin-walled inner Stainless Steel pipe and an outer Carbon Steel pipe, was used as a model in the current study. Finite element analysis was used as an experimental method to determine the stresses and the deformations on the clad pipe due to applied tensions and heat. In addition, the clad pipe was put under the same temperature conditions during the winter and summer times that in Sarir Oil Field to show the heat flux and the temperature gradient across the cross section of the clad pipe. Abaqus software was used to simulate the process. The results of thermal behaviour simulation of the clad pipes were obtained for different mesh types and sizes. A comparison between the different mesh types was carried out to determine the appropriate mesh type for the model. A mesh sensitivity study was performed to obtain the most accurate results. The simulation results show that the most appropriate mesh type for the current model is Tet (free), C3D4T: A 4-node thermally coupled tetrahedron, linear displacement and temperature (model 3). Because it has the maximum S (max) value (2.900E + 09Pa), and most accurate results are obtained when the global mesh size range is from (≤0.02 for the outer pipe and from ≤ 0.009 for the inner pipe).

Keywords

Clad Pipe, Thermal Analysis, 3D Finite Element Modelling

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