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Research Papers: Codes and Standards

On the Buckling of Spiral Wound Gaskets

[+] Author and Article Information
Hocine Attoui

Ecole de Technologie Superieure,
1100 Notre-Dame Ouest,
Montreal, QC H3C 1K3, Canada
e-mail: attoui_houcine@yahoo.fr

Abdel-Hakim Bouzid

Professor
Fellow ASME
Ecole de Technologie Superieure,
1100 Notre-Dame Ouest,
Montreal, QC H3C 1K3, Canada
e-mail: hakim.bouzid@etsmtl.ca

Jerry A. Waterland

Vice President
VSP Technologies, Inc.,
8140 Quality Drive,
Prince George, VA 23875
e-mail: Jerry.waterland@vsptechnologies.com

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received January 8, 2016; final manuscript received February 16, 2016; published online April 28, 2016. Assoc. Editor: Kunio Hasegawa.

J. Pressure Vessel Technol 138(4), 041205 (Apr 28, 2016) (7 pages) Paper No: PVT-16-1005; doi: 10.1115/1.4032852 History: Received January 08, 2016; Revised February 16, 2016

The buckling of spiral wound gaskets (SWGs) causes turbulence of the fluid flow inside flanges and may result in leakage failure over time due to the unwinding of the spirals. A few limited studies on the lateral forces generated by axial compression of the gasket sealing element which cause this phenomenon are available in the literature. The lateral forces are generated during initial tightening and are not distributed uniformly in the circumferential direction. Hence, there is an introduction of concentrated forces in small areas. The nonuniform gasket contact stress caused by the tightening sequence makes the problem more complex. It is suggested to study experimentally the buckling of SWGs by developing a special test bench designed for this purpose. This test bench is able to measure the lateral loads and winding inward displacement during the tightening process. The experimental results are to be compared to those obtained by numerical finite element simulation for the purpose of extrapolating for other size gaskets.

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References

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Figures

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Fig. 1

SWG with outer ring

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Fig. 2

Instrumented NPS 4 class 900 bolted joint

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Fig. 3

Inward radial displacement sensor

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Fig. 4

FE mesh model of a SWG

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Fig. 5

In-plane buckling of inner ring of class 900 SWGs: analytical and numerical FE results

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Fig. 6

Out-of-plane buckling of outer ring of class 900 SWGs: analytical and numerical FE results

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Fig. 7

Relationship between load and windings for inward buckling

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Fig. 8

Relationship between load and displacement

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Fig. 9

Measured outer ring Hoop strain

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Fig. 10

SWG showing buckled windings

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Fig. 11

Winding inward radial displacement as a function of gasket compressive stress

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Fig. 12

Winding inward radial displacement as a function of lateral pressure

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