Evaluation and Completion the Design Methods of Pressure Vessels Flange Joints

Jinescu, Valeriu V.; URSE, GEORGETA; Chelu, Angela

doi:10.37358/rc.18.8.6453

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…where F(ΔT) is calculated with the relation given in works [8][9][10]. The total force in the bolts in service, becomes,…”

Section: Stress Loading Of Flange Joint Componentsmentioning

confidence: 99%

“…. (10) d. Flange stress loading. First (Fb,0), the force in the bolts is applied during pre-clamping -the internal pressure is introduced, the stress loading caused by it emerges, which generates the bending moment (Mb,H).…”

Section: Stress Loading Of Flange Joint Componentsmentioning

confidence: 99%

“…The maximum flange bending stress can be calculated with some relationships to be found in works [10][11][12][13]. For example, if:…”

Section: Stress Loading Of Flange Joint Componentsmentioning

confidence: 99%

See 2 more Smart Citations

A Method Based on the Principle of Critical Energy for Calculating Flange Joints

Jinescu¹,

Chelu²,

Roman³

2020

Rev. Chim.

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An analysis has been made of the behavior of flange joint components under initial stress loading (pre-clamping) and in service. There have been highlighted the drawbacks in calculating flange joints to be found in currently acknowledged methods that do not take into account: - the influence of the bending moment produced by the total hydrostatic end force on bolt strength and flange rotation; - the presence of cracks in the welding or in its thermal influence zone; - the residual stresses; � the relaxation of the sealing gasket over time. The calculation method proposed in the paper takes into account all these particularities of loading. Furthermore, alongside the strength calculation of bolts and flanges, a proposal has been put forth for the calculation of the flange joint leak-tightness.

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“…where F(ΔT) is calculated with the relation given in works [8][9][10]. The total force in the bolts in service, becomes,…”

Section: Stress Loading Of Flange Joint Componentsmentioning

confidence: 99%

Section: Stress Loading Of Flange Joint Componentsmentioning

confidence: 99%

See 1 more Smart Citation

A Method Based on the Principle of Critical Energy for Calculating Flange Joints

Jinescu¹,

Chelu²,

Roman³

2020

Rev. Chim.

Self Cite

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Some research results on the tightness and strength of flange joints

URSE¹,

DURBACĂ²,

PANAIT³

2018

JESI

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The paper presents recently published literature research on the tightness and strength of flange joints. These could influence both the calculation and the maintenance of flange joints. Some of the research results have been compared to normative stipulations currently used in the calculation of flange joints. The presentation covers: – the influence of sealing gasket design and screw load on sealing; – the influence of creep on screw relaxation, and thereby on gasket sealing; – cracking in flange joints; – the influence of an additional axial force of flange joints on the rotation and on the deformation of flange joint components; – flanges without sealing gasket; – the influence of the method of flange joint bolt tightening on the uniformity of bolts loading and tightness.

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Influence of bolts bending on the strength of flanges joints of pressure vessels

Roman¹,

Apostol²

2021

JESI

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This paper highlighted the shortcomings of the current international normative on the calculation of flanges joints with gasket situated inside the circle of bolts holes. The current codes do not take into account, when calculating the flanged joints of the vessels, the bending stress that occurs as a result of the movement of the plates of the joint subjected to internal pressure. The bending of the bolts influences the deformation of the sealing gasket and – namely – the sealing of the flange joint. The knowledge of the bolts bending stresses allows to increase the time between two revisions/repairs and – namely – the useful life of the sealing gasket. The experimental data, obtained with the help of a strain gage bridge and by the Digital Image Correlation method on the designed experimental installation, highlighted the bending of the flange bolts, both for pressurization and depressurization. The experiments were performed at an internal pressure of 0.5; 1.0; 1.5 and 2.0 MPa.

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Evaluation and Completion the Design Methods of Pressure Vessels Flange Joints

Cited by 3 publications

References 14 publications

A Method Based on the Principle of Critical Energy for Calculating Flange Joints

A Method Based on the Principle of Critical Energy for Calculating Flange Joints

Some research results on the tightness and strength of flange joints

Influence of bolts bending on the strength of flanges joints of pressure vessels

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