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Research Papers: Design and Analysis

A New Approach to Model Bolted Flange Joints With Full Face Gaskets

[+] Author and Article Information
Abdel-Hakim Bouzid

Department of Mechanical Engineering, Ecole de Technologie Superieure, 1100 rue Notre-Dame Ouest, Montreal, QC, H3C 1K3, Canadahakim.bouzid@etsmtl.ca

Hichem Galai

Department of Mechanical Engineering, Ecole de Technologie Superieure, 1100 rue Notre-Dame Ouest, Montreal, QC, H3C 1K3, Canadahichem.galai.1@ens.etsmtl.ca

J. Pressure Vessel Technol 133(2), 021203 (Feb 10, 2011) (7 pages) doi:10.1115/1.4001920 History: Received May 17, 2009; Revised March 23, 2010; Published February 10, 2011; Online February 10, 2011

The poor leakage performance of flanges with full face gaskets is attributed to the low reliability of the existing design methods, and in particular, their lack of assessing accurately the bolt and gasket load changes. The prediction of tightness of bolted joints relies very much on the level of precision of the gasket contact stress during operation. The accurate evaluation of this stress requires a flexibility analysis of the joint that includes the flange, gasket, and bolts, and the interaction between them. This paper analyzes the distribution of gasket stress and the load change in bolted joints with full face gaskets. It proposes a simple analytical approach capable of predicting flange rotation and bolt load change during operation. The method is based on the gasket-bolt-flange elastic interaction, including flange rotational flexibility. The proposed model is supported by comparison with numerical finite element analysis of different size flanges.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

Bolted flange model

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Figure 2

Joint flexibility analysis

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Figure 3

Triangular gasket stress distribution

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Figure 4

FE Bolted flange model

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Figure 5

Gasket compression tests

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Figure 6

10 in. flange with CF gasket

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Figure 7

10 in. flange with EPTFE gasket

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Figure 8

24 in. flange with CF gasket

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Figure 9

24 in. flange with EPTFE gasket

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