A Stress Analysis of Pipe Flange Connections

Sawa, Toshiyuki; Higurashi, N.; Akagawa, Hiromi

doi:10.1115/1.2928786

Cited by 56 publications

(23 citation statements)

References 8 publications

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“…In designing bolted joints with gaskets, it is important to understand the interface stress distribution that governs the sealing performance. Some investigations have been carried out on the characteristics [1,2] and the design [3] of bolted joints such as the interface stress distribution and the sealing performance evaluation. Recently, however, it is required to improve the sealing performance since many mechanical structures are used under increasingly severe operative conditions.…”

mentioning

confidence: 99%

FEM stress analysis and sealing performance improvement of box-shaped bolted flanged joints using silicone sealant under internal pressure and thermal conduction conditions

Kawamura¹,

Sawa²,

Yoneno³

2003

Journal of Adhesion Science and Technology

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Interface stresses and sealing performance of thin-wall box-shaped bolted anged joints using silicone sealant under internal pressure and thermal conduction conditions are analyzed by the thermo-elastic nite element method. The exible anges were fastened by M8 bolts and nuts with an initial clamping force (bolt preload) after being joined with the silicone sealant. In the elastic and thermo-elastic Finite Element Method (FEM) calculations, the effects of the bolt pitch distance, ange rigidity and ange thickness were examined on the interface stress distributions. In addition, the effects of the linear thermal expansion coef cient and Young's modulus of the silicone sealant in the steady temperature state were also examined from a design standpoint. In the experiments, leakage pressure was measured when the silicone sealant was applied between an aluminum exible ange with 1 mm thickness and an aluminum ange (body) with 10 mm thickness. Measurements of sealing performance with the silicone sealant and a sheet gasket were also conducted. In addition, strains in the joint in steady temperature states were also measured by strain gauges to understand the effect of the operative temperature on the sealing performance. The experimental results were found to be in fairly good agreement with the calculated results. From the results, it was found that the effect of the thermal conduction condition was greater than that of the internal pressure on both the interface stress distributions and the sealing performance. In addition, the sealing performance was found to be better in the joint with the silicone sealant than that with the sheet gasket.

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mentioning

confidence: 99%

FEM stress analysis and sealing performance improvement of box-shaped bolted flanged joints using silicone sealant under internal pressure and thermal conduction conditions

Kawamura¹,

Sawa²,

Yoneno³

2003

Journal of Adhesion Science and Technology

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“…The authors investigated the effect of hub taper and the number of bolts on the gasket contact stresses. Sawa et al [10] investigated the contact stresses analytically using an axisymmetric elasticity formulation and conducted experimental analysis of leakage.…”

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confidence: 99%

Analysis of Leakage in Bolted-Flanged Joints Using Contact Finite Element Analysis

Estrada¹

2015

JMEA

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Abstract:The evolution of leakage is studied using detailed contact finite element analysis. The distribution of stress at the gasket is analyzed using a contact condition based on slide-line elements using ABAQUS, a commercial finite element code. Slide-line elements also take into account pressure penetration as contact that is lost between flange and gasket. Results are presented for a particular flange, a raised face flange sealed by a mild steel gasket. A comparison of the results from the gasket contact analysis and the contact conditions specified by the ASME Boiler and Pressure Vessel Code, Sections VIII, Division 1 shows that the conditions specified in the ASME Code predict leakage relatively accurately.

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“…Analytical models have been developed to capture the deformation response of a gasket (e.g. Sawa et al, 1991;Bouzid and Derenne, 2002). Sawa et al (1991) modelled a metallic gasket as an elastic body.…”

Section: Bolted Flange Joint Assembly (Bfja)mentioning

confidence: 99%

“…Sawa et al, 1991;Bouzid and Derenne, 2002). Sawa et al (1991) modelled a metallic gasket as an elastic body. However, this approach cannot be used for semimetallic gaskets since it does not account for the non-linear behaviour of such gaskets (Krishna et al, 2007).…”

Section: Bolted Flange Joint Assembly (Bfja)mentioning

confidence: 99%

“…An elastic model representation of the gasket may be valid only if the stresses generated are elastic on loading and they are relieved at removal of the load (Jenco and Hunt, 2000). Sawa et al (1991) modelled a raised-face metallic gasket as an elastic hollow cylinder. However, this elastic model is unsuitable for a BFJA employing a semi-metallic gasket because the external loads typically applied on the BFJA cause plastic deformation of the filler material.…”

Section: Elastic and Elastic-plastic Modelmentioning

confidence: 99%

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Deformation and Stresses Generated on The Bolted Flange Joint Assembly and The Grayloc Clamp Connector at Elevated Temperatures

Mogri¹

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Finite element analyses were performed to investigate the leakage and structural integrity of the bolted flange joint assembly (BFJA) and Grayloc ® clamp connector (GCC), when each assembly was subjected to the external loads of bolt preload, internal pressure and thermal loadings. The thermal loadings were of both spatially-uniform and spatiallynonuniform temperatures on the assemblies. The initial bolt preload applied on the BFJA and the GCC was 60,000 N and 6,000 N, respectively. The internal pressure for both assemblies was 27 MPa. The BFJA was found to have satisfactory leakage and structural performance for the thermal loadings expected on the low-temperature (260°C) side of the Carleton Supercritical Water (CSCW) loop. The GCC was found to have satisfactory leakage and structural performance for the thermal loadings expected on the hightemperature (600°C) side of the CSCW loop. The leakage integrity of the GCC was found to remain intact for a temperature difference of 15°C between the inner and outer surfaces of the flange. This was not the case for a temperature difference of 100°C.iii AcknowledgementsThe effort in putting together this research work has been shared by many people.Foremost, I am grateful of Allah for blessing me with the intellect and knowledge to pursue this research work. I would like to thank Carleton University for providing me with the platform for undertaking this research work and providing me with the latest facilities to assist me in my research work.

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A Stress Analysis of Pipe Flange Connections

Cited by 56 publications

References 8 publications

FEM stress analysis and sealing performance improvement of box-shaped bolted flanged joints using silicone sealant under internal pressure and thermal conduction conditions

FEM stress analysis and sealing performance improvement of box-shaped bolted flanged joints using silicone sealant under internal pressure and thermal conduction conditions

Analysis of Leakage in Bolted-Flanged Joints Using Contact Finite Element Analysis

Deformation and Stresses Generated on The Bolted Flange Joint Assembly and The Grayloc Clamp Connector at Elevated Temperatures

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