Effect of thermal loading on sealing behavior of single and twin-gasketed flange joints

Nelson, N. Rino; Prasad, N. Siva; Sekhar, A. S.

doi:10.1177/0954408915574295

Cited by 10 publications

(8 citation statements)

References 15 publications

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“… In FEA, leakage is determined using residual stress line, which specifies the minimum residual stress to be present on gasket under specified internal pressure. The residual stress lines (RSL) for single and twin-gasketed joints 13,21,22 are given by equations (5) and (6), respectively. The gasket stress variation line from FEA and residual stress line are plotted against internal pressure.…”

Section: Resultsmentioning

confidence: 99%

“…The gasket used here is semi-metallic spiral wound gasket with graphite filler. It is characterized using stress-displacement relation ( Figure 2) at room temperature from Nelson et al 13 taking into account, nonlinear behavior and hysteresis during unloading.…”

Section: Flange Joint Configurationmentioning

confidence: 99%

“…It is characterized using stress-displacement relation (Figure 2) at room temperature from Nelson et al. 13 taking into account, nonlinear behavior and hysteresis during unloading.

Figure 2.Stress-displacement relation for gasket material.…”

Section: Flange Joint Configurationmentioning

confidence: 99%

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Studies on joint strength and sealing behavior of single and twin-gasketed flange joints

Nelson

Prasad

Sekhar

2017

Proceedings of the Institution of Mechanical Engineers, Part E:

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Leakage is the main mode of failure in gasketed flange joints used in nuclear and thermal power plants. The leakage occurs when the joint is not able to withstand the internal fluid pressure. To evaluate the leakage behavior of gasketed flange joint, it is important to incorporate gasket properties and interfacial contact behavior due to friction. However, for safe joint operation, the members also should be structurally sound without exceeding allowable limit of materials. In this study, the joint strength and sealing behavior of gasketed flange joint are investigated through experiments by carrying out leakage test. The joint strength is evaluated based on strains developed in flanges along longitudinal and tangential direction under both pretightening and pressurizing stages. Three-dimensional finite element simulation is also performed under both aforesaid stages, considering the nonlinear properties of gasket along with hysteresis during unloading. The finite element results of joint strength and leakage pressure are compared with experimental values and observed to be conservative. In addition, the performance of twin gaskets (two gaskets concentric to each other) through both experiment and simulation is also evaluated and compared with that of the single gasket. From the experiment and finite element analysis, it is found that the sealability of twin-gasketed joint is higher than that of single-gasketed joint.

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Section: Resultsmentioning

confidence: 99%

Section: Flange Joint Configurationmentioning

confidence: 99%

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Studies on joint strength and sealing behavior of single and twin-gasketed flange joints

Nelson

Prasad

Sekhar

2017

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…Researchers [14][15][16][17][18][19][20] have concluded that under additional axial loading in addition to the internal pressure, the performance of the joint is significantly affected. Abid et al [21][22][23][24] under combined internal pressure and variable temperature (static and transient) loading concluded that thermal loading becomes dominant for the failure of gasketed joint performance. In real world applications, bolted pipe joints are increasingly subjected to different structural and thermal loads in combination; even to the extent that they are subjected to thermal and pressure shocks for high end applications.…”

Section: Introductionmentioning

confidence: 99%

Thermal buckling of cylindrical shell with temperature-dependent material properties: Conventional theoretical solution and new numerical method

Wang

Han

Nash

et al. 2018

Mechanics Research Communications

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In this paper the strength and sealing performance of a gasketed bolted flanged pipe joint is studied under bolt up and combined operating conditions using 3D nonlinear finite element analysis. The key combinations of internal pressure, axial and thermal loading are considered. The strength of the joint is seen to be affected by the axial and thermal loading combination whereas the joint sealing is seen to be dependent on the bolt up strategy during assembly and is slightly affected under pressure but only partially affected under axial loading in certain locations. Thermal loading was also considered and was found to have a significant effect on the sealing performance up to 100 o C, but beyond that no sealing was observed, resulting in the possibility of leakage and hence increasing the risk of overall joint failure. Finally, the joint load capacities are determined under various combined loadings showing its safe and unsafe operational limits.

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“…Fukuoka and Takaki 3 mainly focus on the bolt scatter, tightening sequence and bearing surfaces. Nelson et al 4 studied the sealing capability of gasketed flange joints subjected to internal pressure at high temperature. Abid et al [5][6][7][8] also performed 3D finite element modal analysis of gasketed bolted flanged pipe joints under bolt-up.…”

Section: Introductionmentioning

confidence: 99%

Joint strength of gasketed bolted pipe flange joint under combined internal pressure plus axial load with different (industrial and ASME) bolt-up strategy

Khan

Abid

Jameel

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part E:

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Gasketed bolted flange joints are used in process industry for connecting pressure vessels and pipes. Design procedures available in the literature mostly discuss structural strength, while sealing failure is still a big concern in industries. Similarly, limited work is found in the literature regarding performance of gasketed bolted joints under combined loading. A detailed 3D nonlinear finite element analysis is performed to study the strength and sealing of a gasketed bolted flanged pipe joint under different bolt-up strategy (Industrial and ASME) and under combined internal pressure and axial loading.

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Effect of thermal loading on sealing behavior of single and twin-gasketed flange joints

Cited by 10 publications

References 15 publications

Studies on joint strength and sealing behavior of single and twin-gasketed flange joints

Studies on joint strength and sealing behavior of single and twin-gasketed flange joints

Thermal buckling of cylindrical shell with temperature-dependent material properties: Conventional theoretical solution and new numerical method

Joint strength of gasketed bolted pipe flange joint under combined internal pressure plus axial load with different (industrial and ASME) bolt-up strategy

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