Návrh potrubí v papírně

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Etuduhor, Nelson Ovie

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D

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Vysoké učení technické v Brně. Fakulta strojního inženýrství

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Abstract

Piping systems form a vital part of industrial infrastructure, providing the essential networks through which fluids such as liquids and gases, are conveyed within and between various processing units. The effectiveness of their design significantly influences the overall performance, safety, and reliability of industrial operations. Piping design integrates mechanical engineering principles with process requirements, covering material selection, sizing, layout, support specification, and stress analysis. These processes are governed by relevant national and international codes. This diploma thesis deals with the design of a piping in a paper mill with particular focus on the stress analysis. The study is aimed at investigating the mechanical performance of an existing piping model through numerical solution using CAESAR II (Version 14), under the regulatory framework of EN 13480-3 which is the European standard for metallic industrial piping. The project begins with the modification and integration of the piping model alongside its structural support system. Stress analysis is conducted using CAESAR II, applying defined load cases to simulate various operational conditions such as internal pressure, thermal expansion, and occasional external loads. The resulting stresses are evaluated in line with EN 13480-3 criteria to verify compliance with allowable limits. Additionally, the study compares the system’s performance with and without the supporting structural model to assess its influence on the overall mechanical behavior of the piping network.
Piping systems form a vital part of industrial infrastructure, providing the essential networks through which fluids such as liquids and gases, are conveyed within and between various processing units. The effectiveness of their design significantly influences the overall performance, safety, and reliability of industrial operations. Piping design integrates mechanical engineering principles with process requirements, covering material selection, sizing, layout, support specification, and stress analysis. These processes are governed by relevant national and international codes. This diploma thesis deals with the design of a piping in a paper mill with particular focus on the stress analysis. The study is aimed at investigating the mechanical performance of an existing piping model through numerical solution using CAESAR II (Version 14), under the regulatory framework of EN 13480-3 which is the European standard for metallic industrial piping. The project begins with the modification and integration of the piping model alongside its structural support system. Stress analysis is conducted using CAESAR II, applying defined load cases to simulate various operational conditions such as internal pressure, thermal expansion, and occasional external loads. The resulting stresses are evaluated in line with EN 13480-3 criteria to verify compliance with allowable limits. Additionally, the study compares the system’s performance with and without the supporting structural model to assess its influence on the overall mechanical behavior of the piping network.

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Citation

ETUDUHOR, N. Návrh potrubí v papírně [online]. Brno: Vysoké učení technické v Brně. Fakulta strojního inženýrství. 2025.

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Document version

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Language of document

en

Study field

bez specializace

Comittee

doc. Ing. Pavel Charvát, Ph.D. (předseda) prof. Ing. Jindřich Petruška, CSc. (místopředseda) doc. Ing. Radek Kalousek, Ph.D. (člen) doc. Ing. František Lízal, Ph.D. (člen) doc. Ing. Jiří Šremr, Ph.D. (člen) doc. Ing. Vít Jan, Ph.D. (člen)

Date of acceptance

2025-08-28

Defence

The student informed the examination committee about the methodology, results, and conclusions of his diploma thesis. He answered all questions posed by the reviewer. Doc. Šremr asked whether the ends of the pipe were fixed. The student answered that they were. Doc. Kalousek commented that different types of boundary conditions could be applied, e.g., periodic boundary conditions. Doc. Lízal asked why this particular segment had been chosen for analysis. The student responded that he had been instructed to calculate this segment. In the subsequent discussion, Doc. Charvát asked about the fixed points of the system, i.e. where the pipe cannot move and where all supports are located. Prof. Petruška inquired about the difference between supported and unsupported cases, since reaction forces exist in both situations. The student was able to explain the differences only with the help of the committee. It was also noted that both systems were in fact supported, and the terminology used in the thesis was confusing for the committee. Doc. Charvát then asked more generally about the connections between the supporting structure and the pipe, which the student described with the help of his presentation. This initiated a broader discussion between the committee and the student on this topic. The student had not considered deformations of the supporting structure, as they had not been included in the calculation. Doc. Kalousek also asked whether the pipe was empty, or filled with gas or liquid. The student explained that only pressure and temperature conditions inside the pipe had been prescribed, but no specific medium had been defined, and the weight of the medium had not been considered. Doc. Jan pointed out in the discussion that the weight of the medium may be taken into acount. Finally, Doc. Lízal asked about the student’s individual contribution to the thesis and the principle of the CAESAR software. The student explained the principle of the software, and with some difficulties, partially clarified his own contribution to the thesis.

Result of defence

práce byla úspěšně obhájena

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