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RESEARCH PAPERS

An Analytical Solution for Evaluating Gasket Stress Change in Bolted Flange Connections Subjected to High Temperature Loading

[+] Author and Article Information
Abdel-Hakim Bouzid

 Ecole de Technologie Superieure, Mechanical Engineering Department, 1100, Rue Notre-Dame Ouest, Montreal (Quebec) H3C 1K3, Canadahakim.bouzid@etsmtl.ca

Akli Nechache

 Ecole de Technologie Superieure, Mechanical Engineering Department, 1100, Rue Notre-Dame Ouest, Montreal (Quebec) H3C 1K3, Canadaanechache@mec.etsmtl.ca

J. Pressure Vessel Technol 127(4), 414-422 (May 29, 2005) (9 pages) doi:10.1115/1.2042480 History: Received July 06, 2004; Revised May 29, 2005

The tightness of bolted flanged joints subjected to elevated temperature is not properly addressed by flange design codes. The development of an analytical method based on the flexibility of the different joint components and their elastic interaction could serve as a powerful tool for elevated temperature flange designs. This paper addresses the effect of the internal fluid operating temperature on the variation of the bolt load and consequently on the gasket stress in bolted joints. The theoretical analysis used to predict the gasket load variation as a result of unequal radial and axial thermal expansion of the joint elements is outlined. It details the analytical basis of the elastic interaction model and the thermally induced deflections that are used to evaluate the load changes. Two flange joint type configurations are treated: a joint with identical pair of flanges and a joint with a cover plate. The analytical models are validated and verified by comparison to finite element results.

Copyright © 2005 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Flange analytical model

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Figure 2

Displacements due to temperature (a) radial and (b) axial

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Figure 3

3D finite element models

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Figure 4

Mechanical behaviors of gasket materials

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Figure 5

Flange rotations of 16in. HE flange used in pairs due to temperature loading only

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Figure 6

Flange rotations of 24in. HE flange used in pairs due to temperature loading only

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Figure 7

Flange rotations of 52in. HE flange used in pairs due to temperature loading only

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Figure 8

Radial distribution of gasket contact stress in 16in. HE flange used in pairs

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Figure 9

Radial distribution of gasket contact stress in 16in. HE flange used with cover plate

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Figure 10

Radial distribution of gasket contact stress in 24in. HE flange used in pairs

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Figure 11

Radial distribution of gasket contact stress in 24in. HE flange used with cover plate

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Figure 12

Radial distribution of gasket contact stress in 36in. HE flange used in pairs

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Figure 13

Radial distribution of gasket contact stress in 36in. HE flange used with cover plate

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Figure 14

Radial distribution of gasket contact stress in 52in. HE flange used in pairs

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Figure 15

Radial distribution of gasket contact stress in 52in. HE flange used with cover plate

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