Strength of Integral Pipe Flanges : No.1 Stress Distribution in Flange and the Criticism of the Conventional Standards

Nishioka, Kunio; Morita, Yoshiyasu; Kawashima, Hisakazu

doi:10.1299/jsme1958.22.1705

Cited by 6 publications

(2 citation statements)

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“…However, these codes are almost entirely dependent on experience, and consequently some problems concerning pipe flange connections have been encountered. Up to now, many investigations (Nishioka et al, 1979a(Nishioka et al, , 1979bKohmura, 1985Kohmura, , 1986Sawa et al, 1986;Sawa and Kumano, 1985) have been carried out on the pipe flange connections; but it seems that only a few investigations, including the studies done by Nishioka (1979aNishioka ( , 1979b and ourselves (Sawa et al, 1986), have been done on pipe flange connections, taking into account the entire structure which consists of hubs, flanges, gaskets and bolts, because of the difficulties encountered in attempting an analysis. For this reason, several characteristics of pipe flange connections are yet to be clarified.…”

Section: Introductionmentioning

confidence: 99%

A Stress Analysis of Pipe Flange Connections

Sawa

Higurashi²,

Akagawa³

1991

Journal of Pressure Vessel Technology

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The use of pipe flange connections is standardized in the codes of JIS, ASME, DIN and so on. However, these codes are almost entirely dependent on experience, and subsequently some problems concerning pipe flange connections have been encountered. In the present paper, the distribution of contact stresses which governs the sealing performance is analyzed as a three-body contact problem, using an axisymmetrical three-dimensional theory of elasticity. The effects of the stiffness and the thickness of raised face metallic gaskets on the contact stresses and the effective gasket seating width are shown by numerical calculation. Moreover, stresses produced on the hub, the load factor (the relationship between an increment of bolt axial force and an internal pressure), and the maximum stress caused in bolts are analyzed. For verification, experiments are carried out. The analytical results are satisfactorily consistent with the experimental results.

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Section: Introductionmentioning

confidence: 99%

A Stress Analysis of Pipe Flange Connections

Sawa

Higurashi²,

Akagawa³

1991

Journal of Pressure Vessel Technology

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“…Later, the same researchers [7] revisited, and extended their model to include effects of pipe/hub and internal pressure using a dimensional analysis. Nishioka et al [8,9] used finite element analysis to investigate the loss of contact in a flanged-joint. They formulated the problem as described above; however, due to limits on available computational techniques at the time, they were only able to use an iterative procedure to determine the loss of contact.…”

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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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Including bolt bending stiffness in finite‐element analysis of flanged connections

Tenchev¹

1991

Commun. appl. numer. methods

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SUMMARYThe stiffness matrix of a spring constraint is derived that can restrict only rotation in a mesh of finite elements having no rotation as a degree of freedom. It is connected to two nodes of the structure and does not increase the total number of degrees of freedom. To validate the stiffness matrix, a simple 2-D numerical example is presented which is in excellent agreement with theoretical results.Integral grey cast iron flanges (BS4504: 1969) are analysed including and not including the bending stiffness of the bolts. The analysis shows that neglecting the bending stiffness of the bolts results in up to 35% error of overestimating the maximum stress in large-diameter flanges.

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Strength of Integral Pipe Flanges : No.1 Stress Distribution in Flange and the Criticism of the Conventional Standards

Cited by 6 publications

References 1 publication

A Stress Analysis of Pipe Flange Connections

A Stress Analysis of Pipe Flange Connections

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

Including bolt bending stiffness in finite‐element analysis of flanged connections

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