Finite Element Analysis of a Gasketed Flange Joint Under Combined Internal Pressure and Thermal Transient Loading

2007 ◽  
Author(s):  
Muhammad Abid ◽  
Javed A. Chattha ◽  
Kamran A. Khan
Keyword(s):  
Finite Element Analysis ◽  
Steady State ◽  
Internal Pressure ◽  
Thermal Loading ◽  
Flange Joint ◽  
Element Analysis ◽  
Transient Loading ◽  
Thermal Transient ◽  
Transient Thermal ◽  
Bolted Flange

Performance of a bolted flange joint is characterized mainly by its ‘strength’ and ‘sealing capability’. A number of analytical and experimental studies have been conducted to study these characteristics only under internal pressure loading. In the available published work, thermal behavior of the pipe flange joints is discussed under steady state loading with and without internal pressure and under transient loading condition without internal pressure. The present design codes also do not address the effects of steady state and thermal transient loading on the structural integrity and sealing ability. It is realized that due to the ignorance of any applied transient thermal loading, the optimized performance of the bolted flange joint can not be achieved. In this paper, in order to investigate gasketed joint’s performance i.e. joint strength and sealing capability under combined internal pressure and transient thermal loading, an extensive nonlinear finite element analysis is carried out and its behavior is discussed.

3-D Non-Linear Finite Element Analysis of a Non-Gasketed Flange Joint Under Combined Internal Pressure and Axial Loading

2007 ◽  
Author(s):  
Muhammad Abid ◽  
Abdul W. Awan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Internal Pressure ◽  
Structural Integrity ◽  
Experimental Studies ◽  
Axial Loading ◽  
External Loading ◽  
Flange Joint ◽  
Element Analysis ◽  
Bolted Flange

A number of analytical and experimental studies have been conducted to study ‘strength’ and ‘sealing capability’ of bolted flange joint only under internal pressure loading. Due to the ignorance of the external i.e. axial loading, the optimized performance of the bolted flange joint can not be achieved. A very limited work is found in literature under combined internal pressure and axial loading. In addition, the present design codes do not address the effects of axial loading on the structural integrity and sealing ability of the flange joints. From previous studies, non-gasketed joint is claimed to have better performance as compared to conventional gasketed joint. To investigate non-gasketed joint’s performance i.e. joint strength and sealing capability under combined internal pressure and any applied external loading, an extensive 3D nonlinear finite element analysis is carried out and overall joint performance and behavior is discussed.

FEM Stress Analysis of Bolted Flange Joints in Elevated Temperature Service Condition

2018 ◽  
Author(s):  
Lu Wang ◽  
Xuedong Chen ◽  
Zhichao Fan ◽  
Jilin Xue
Keyword(s):  
Steady State ◽  
Elevated Temperature ◽  
Internal Pressure ◽  
Heating Rate ◽  
Contact Stress ◽  
Thermal Loading ◽  
Structural Integrity ◽  
Bolt Stress ◽  
Transient Thermal ◽  
Bolted Flange

Performance of a bolted flange joint (BFJ) is characterized mainly by its ‘strength’ and ‘sealing capability’. How to keep the ‘strength’ and ‘sealing capability’ for the BFJ serving at elevated temperature is a difficult problem in engineering applications. The variations of bolt stress and gasket contact stress play an important role on the structural integrity and sealing performance of BFJ in the bolt-up, pressurization and heat-up stages. In this paper, a three-dimensional elastic-plastic finite element model has been developed to investigate the performance of joint under combined internal pressure and elevated temperature. The thermal-structural coupling method has been used to analyze the variations of axial bolt force, maximum blot stress and gasket contact stress under steady-state and transient thermal loadings. The effects of internal pressure, temperature as well as the heating rate on the variations of bolt load, bolt stress and gasket contact stress have been evaluated. The results show that the maximum bolt stress increases while average gasket contact stress decreases with increasing the temperature under steady-state thermal loading. Besides, when the transient thermal loading is considered, heating rate has a significant effect on the maximum bolt stress and gasket contact stress. This research will contribute to the design of BFJ subjected to elevated temperature.

Behavior of Flange Joints Under Combined Internal Pressure and Thermal Loading: The Case of Using Metal-to-Metal Contact Type Gaskets

2013 ◽  
Author(s):  
Kai Ma ◽  
Yi Zhang ◽  
Lanzhu Zhang ◽  
Kaishu Guan
Keyword(s):  
Internal Pressure ◽  
Nuclear Power ◽  
Thermal Loading ◽  
Three Dimensional ◽  
Element Model ◽  
Metal Contact ◽  
Flange Joint ◽  
Contact Type ◽  
Bolted Flange ◽  
Nonlinear Finite Element Model

In a bolted flange joint, metal-to-metal contact type gasket takes over only part of the bolt load to achieve seating stress, and the additional bolt load is transmitted to the metal-to-metal contact to compensate for the unloading effects due to internal and external loadings. Due to this advantage, flange joints with metal-to-metal contact type gaskets are gradually used in chemical industry, nuclear power industry, etc. A three-dimensional nonlinear finite element model is developed to highlight the complex behavior of the flange joint with metal-to-metal contact type gasket under combined internal pressure and thermal loading. Despite of the common perception that the gasket stress in the metal-to-metal contact type gasket stays constant, reduced gasket stress is concluded due to flange rotation and joint thermal expansion.

Mechanical Design of Electrical Isolation Joint

2018 ◽  
Author(s):  
Giovanni Ricco
Keyword(s):  
Finite Element Analysis ◽  
Internal Pressure ◽  
Mechanical Design ◽  
Design Guidelines ◽  
Design Validation ◽  
Element Analysis ◽  
Electrical Isolation ◽  
The Third ◽  
Bolted Flange ◽  
Distribution Of Stresses

The Electrical Isolation Joint is considered a pressure vessel and is usually designed according to ASME VIII Div.1, but the code does not provide specific rules for the component. This paper provides the mechanical design of an Electrical Insulation Joint according to ASME VIII div.1, Appendix 2, “Rules for Bolted Flange.” The scope of this work is to suggest design guidelines to be included in the ASME VIII Div.1 code for Electrical Isolation Joints. The first part of the paper will introduce the geometry of typical electrical isolation joint and will show the distribution of stresses due to internal pressure. The second part of this work will introduce the design of the isolation Joint size of 24” nominal diameter as per ASME VIII div.1 Appendix 2 for items subjected to internal pressure. The third part will compare design results above described with Finite Element Analysis as per ASME VIII div.2 part 5 for design validation.

Comparative thermal stress analysis of gasketed and non-gasketed flange joints for safe operating conditions

2009 ◽  
Vol 223 (3) ◽  
pp. 167-178 ◽  
Author(s):  
M Abid ◽  
M Iqbal ◽  
B Ullah
Keyword(s):  
Steady State ◽  
Internal Pressure ◽  
Thermal Loading ◽  
Complex Analysis ◽  
Load Capacity ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Operating Conditions ◽  
Element Analysis ◽  
Safe Operating

The performance of a flanged joint is characterized mainly by its ‘strength’ and ‘sealing capability’. A number of analytical and experimental studies have been conducted to study these characteristics under only internal pressure loading. However, with the advent of new technological trends for high temperature and high-pressure applications, an increased demand for more complex analysis is recognized. The effect of steady-state thermal loading is a well-recognized problem and makes the analysis more complex. To investigate joint strength and sealing capability under combined internal pressure and different steady-state thermal loadings, a comparative three-dimensional non-linear finite-element analysis of gasketed and non-gasketed flange joints is carried out and their behaviour is discussed. To determine the safe operating conditions or actual joint load capacity, both the flange joints are further analysed for different internal pressures and temperatures.

Behavior of gasketed bolted pipe flange joint under combined internal pressure, axial, and bending load: Three-dimensional numerical study

2017 ◽  
Vol 232 (3) ◽  
pp. 314-322 ◽  
Author(s):  
Muhammad Abid ◽  
Niaz B Khan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Internal Pressure ◽  
Structural Integrity ◽  
Numerical Study ◽  
Three Dimensional ◽  
External Loading ◽  
Flange Joint ◽  
Element Analysis ◽  
Bending Load

Optimized performance of joint is categorized by its “structural integrity” and “sealing capability”. In literature, limited data are available regarding the performance of gasketed bolted flanged joint under combined internal and external loading; hence an optimized joint performance cannot be addressed. In this paper, a detailed three-dimensional nonlinear finite element analysis of bolted gasketed flange joint is performed, to study its performance under combined internal (pressure) and external (axial and bending) load. Results of the finite element analysis are compared with the experimental results available in literature providing the validation of the numerical approach developed.

Performance of a Gasketed Bolted Flange Joint Under Combined Structural and Thermal Transient Loading (Taking Bolt Scatter Into Consideration): FEA Approach

2009 ◽  
Author(s):  
Muhammad Abid ◽  
Kamran Ahmed Khan ◽  
Javed Ahmad Chattha
Keyword(s):  
Element Model ◽  
Industrial Applications ◽  
Operating Conditions ◽  
Flange Joint ◽  
Transient Loading ◽  
Sealing Performance ◽  
Need To Evaluate ◽  
Thermal Transient ◽  
Temperature And Pressure ◽  
Bolted Flange

Performance of a bolted flange joint is characterized mainly by its ‘strength’ and ‘sealing capability’. The weakest part of a high temperature and pressure envelope is the gasket in bolted flange joints, as these are prone to leakage. It causes loss of productivity and in severe cases, loss of lives. There is a need to evaluate the sealing performance of a gasketed bolted flange joint (GBFJ) under combined structural and thermal transient loadings as these occur in industrial applications. In this paper using complete 3D Finite Element Model, the joint’s performance is studied during bolt up and operating (combined structural and thermal transient loading) condition. During bolt up, bolts are tightened as per ASME bolt up strategy and any bolt scatter and its effect during applied operating conditions is discussed.

Fitness for Service Assessments of Bulging and Out-of-Round Structures

2004 ◽  
Author(s):  
Peter Carter ◽  
D. L. Marriott ◽  
M. J. Swindeman
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Internal Pressure ◽  
Structural Model ◽  
External Pressure ◽  
Element Analysis ◽  
Structural Imperfection ◽  
Level 2

This paper examines techniques for the evaluation of two kinds of structural imperfection, namely bulging subject to internal pressure, and out-of-round imperfections subject to external pressure, with and without creep. Comparisons between comprehensive finite element analysis and API 579 Level 2 techniques are made. It is recommended that structural, as opposed to material, failures such as these should be assessed with a structural model that explicitly represents the defect.

scholarly journals Analysis for Wrinkling Behavior of Girth-Welded Line Pipe

1996 ◽  
Author(s):  
Luiz T. Souza ◽  
David W. Murray
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Internal Pressure ◽  
Experimental Test ◽  
Element Model ◽  
Element Analysis ◽  
Line Pipe ◽  
New Era ◽  
Analytical Tools

The paper presents results for finite element analysis of full-sized girth-welded specimens of line pipe and compares these results with the behavior exhibited by test specimens subjected to constant axial force, internal pressure and monotonically increasing curvatures. Recommendations for the ‘best’ type of analytical finite element model are given. Comparisons between the behavior predicted analytically and the observed behavior of the experimental test specimens are made. The mechanism of wrinkling is explained and the evolution of the deformed configurations for different wrinkling modes is examined. It is concluded that the analytical tools now available are sufficiently reliable to predict the behavior of pipe in a manner that was not previously possible and that this should create a new era for the design and assessment of pipelines if the technology is properly exploited by industry.

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