Готові списки джерел за темами / Bolted Flange Joint

Добірка наукової літератури з теми "Bolted Flange Joint"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Bolted Flange Joint"

1

Bouzid, Abdel-Hakim, and Akli Nechache. "An Analytical Solution for Evaluating Gasket Stress Change in Bolted Flange Connections Subjected to High Temperature Loading." Journal of Pressure Vessel Technology 127, no. 4 (May 29, 2005): 414–22. http://dx.doi.org/10.1115/1.2042480.

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Анотація:
The tightness of bolted flanged joints subjected to elevated temperature is not properly addressed by flange design codes. The development of an analytical method based on the flexibility of the different joint components and their elastic interaction could serve as a powerful tool for elevated temperature flange designs. This paper addresses the effect of the internal fluid operating temperature on the variation of the bolt load and consequently on the gasket stress in bolted joints. The theoretical analysis used to predict the gasket load variation as a result of unequal radial and axial thermal expansion of the joint elements is outlined. It details the analytical basis of the elastic interaction model and the thermally induced deflections that are used to evaluate the load changes. Two flange joint type configurations are treated: a joint with identical pair of flanges and a joint with a cover plate. The analytical models are validated and verified by comparison to finite element results.
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2

Qureshi, Jawed, Yashida Nadir, and Shaise K. John. "Cyclic Response of Bolted and Hybrid Pultruded FRP Beam-Column Joints between I-Shaped Sections." Fibers 9, no. 11 (October 28, 2021): 66. http://dx.doi.org/10.3390/fib9110066.

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Анотація:
This paper presents cyclic behaviour of bolted and hybrid–combined bolted and bonded fibre reinforced polymer (FRP) beam-to-column joints between I-shaped members using steel and FRP cleats. Five full-scale cyclic tests are carried out to study moment-rotation behaviour, cyclic response, and failure patterns. The test parameters include position of cleat (flange or combined web and flange), fastening method (bolting or hybrid–combining bolting and bonding) and cleat material (steel or FRP). First two tests had bolted and hybrid joints with steel flange and web double angles. Next two tests had the same joint detailing but with no web cleats. Last test used bolted joint only with FRP web and flange cleats. Three failure modes were observed: shear-out failure of the beam’s bolted zone, adhesive debonding with shear-out failure and delamination cracking. Cyclic performance of the joints was assessed by hysteresis moment-rotation curves and accumulated dissipated energy. Hybrid joints showed the best overall cyclic performance with accumulated dissipated energy about 75% higher than the bolted joints. Bolted joints with FRP cleats exhibited the worst cyclic performance. Flange cleated joints showed similar performance to web and flange cleated joints.
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3

Zhang, Yan, and He Hui Wang. "Emergency Stop and Drive Analysis of Bolted Flange Joints." Applied Mechanics and Materials 799-800 (October 2015): 585–88. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.585.

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Анотація:
The strength and tightness of flange joints will be weaker due to the temperature fluctuations. There exists no mature calculation procedure that can accounts for the temperature fluctuations’ effect on the performance of flanged joint. Based on the finite element simulation of a flanged joint under emergency stop and drive condition using ANSYS, the strength integrity and sealing performance of it are evaluated according to code JB4732-2005. The results show that stress of every component increases after experiencing an emergency stop and drive, flange deflection is more serious, resulting in integrity and tightness failure and can’t meet the sealing requirements. Repeatedly stop and drive will lead to discontinuity and alternating loads for the flanged joints, which will increase the leakage trend.
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4

Khan, Niaz B., Muhammad Abid, Mohammed Jameel, and Hafiz Abdul Wajid. "Joint strength of gasketed bolted pipe flange joint under combined internal pressure plus axial load with different (industrial and ASME) bolt-up strategy." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231, no. 3 (October 29, 2015): 555–64. http://dx.doi.org/10.1177/0954408915614460.

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Анотація:
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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5

Hayman, Edward, and Clyde Neely. "Solving the Puzzle of Bolted Joints." Mechanical Engineering 133, no. 06 (June 1, 2011): 48–52. http://dx.doi.org/10.1115/1.2011-jun-5.

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Анотація:
This article discusses the various ways of solving the puzzle of bolted joint assembly. In 2001, The PCC-1-2000 Guidelines for Pressure Boundary Bolted Flange Joint Assembly presented with knowledge and practices specific to the assembly of bolted flange joints. The puzzle solution that came from this box was the most definitive to date and allowed those dealing with bolted joints to assemble the variables by methods that had been used successfully for many years by many people. This document is helping people across industry not only to assemble bolted flange joints, but also to establish joint integrity programs, procedures, and best practices. PCC-1-2010 shifts the emphasis to gasket stress and gasket type and provides instruction and information pertinent to bolt torque values. The 2010 document contains, for instance, a whole section on bolt stress—the unit load that should be put on the bolts—and includes tables as well.
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6

Webjörn, J. "An Alternative Bolted Joint for Pipework." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 203, no. 2 (August 1989): 135–38. http://dx.doi.org/10.1243/pime_proc_1989_203_199_02.

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Анотація:
Use of the conventional gasketed pipe joint with raised-face flanges is questioned. In this note the author demonstrates the interaction of forces and displacements within the structure, explains why gaskets leak, points out the weaknesses of the bolting and also some inconsistencies in codes and standards. An alternative compact flange design is presented based on modern principles of bolted joint engineering.
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7

Eskenati, Amir Reza, Amir Mahboob, Ernest Bernat-Maso, and Lluís Gil. "Experimental and Numerical Study of Adhesively and Bolted Connections of Pultruded GFRP I-Shape Profiles." Polymers 14, no. 5 (February 24, 2022): 894. http://dx.doi.org/10.3390/polym14050894.

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Анотація:
Recent developments indicate that the application of pultruded FRP profiles has been continuously growing in the construction industry. Generating more complex structures composed of pultruded FRP profiles requires joining them. In particular, I-shape glass fiber pultruded profiles are commonly used and the possible joints to connect them should be specifically studied. The mechanical behavior of adhesively and bolted joints for pultruded Glass FRP (GFRP) profiles has been experimentally addressed and numerically modeled. A total of nine specimens with different configurations (bolted joints, adhesive joints, web joints, web and flange joints, and two different angles between profiles) were fabricated and tested, extending the available published information. The novelty of the research is in the direct comparison of joint technologies (bolted vs. adhesive), joint configuration (web vs. flange + web) and angles between profiles in a comprehensive way. Plates for flange joints were fabricated with carbon fiber FRP. Experimental results indicate that adding the bolted flange connection allowed for a slight increase of the load bearing capacity (up to 15%) but a significant increase in the stiffness (between 2 and 7 times). Hence, it is concluded that using carbon FRP bolted flange connection should be considered when increasing the joint stiffness is sought. Adhesively connections only reached 25% of the expected shear strength according to the adhesive producer if comparing the numerically calculated shear strength at the failure time with the shear strength capacity of the adhesive. Apart from assessing adhesive connections, the implemented 3D numerical model was aimed at providing a simplified effective tool to effectively design bolted joints. Although the accurate fitting between experimental and numerical results of the mechanical response, especially the stiffness of the joint, the local failure experimentally observed was not automatically represented by the model, because of the simplified definition of the materials oriented to make the model available for a wide range of practitioners.
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8

Hakimian, Soroosh, Lucas Hof, and Hakim A. Bouzid. "Investigation of Corrosion in Bolted Flanged Joints Using a Novel Experimental Setup." ECS Meeting Abstracts MA2022-01, no. 16 (July 7, 2022): 990. http://dx.doi.org/10.1149/ma2022-0116990mtgabs.

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Анотація:
The second most common cause of hydrocarbon leakage is corrosion in offshore platforms. In seawater and hydrocarbon services, bolted flange joints can be susceptible to corrosion on the flange face. Flanges connect pipes, valves, pumps, and other equipment to form a piping system. In flanged joints, two flanges are bolted together with a gasket between them to provide a seal. The current research considers corrosion in bolted flanged gasketed joints and proposes a new approach to quantify corrosion at the gasket and flange interface. According to the literature, both crevice corrosion and galvanic corrosion widely occur in bolted flanged gasketed connections, which create paths to leakage of the pressurized fluid. Leakage failure in bolted flanged gasketed joints can cause hazards to the environment and human safety. Corrosion in bolted gasketed joints was investigated in other papers and reports. Still, these studies did not consider the influence of the operating conditions. Fluid flow, pressure, pH, conductivity, temperature, and gasket contact pressure are some parameters to consider. To achieve this goal, a novel experimental setup - mimicking an industry-standard NPS 2 bolted flange connection - is introduced to examine the corrosion behavior of the contact surface between the flange and gasket. The setup enables monitoring and recording of the corrosion parameters under the influence of service conditions (gasket contact pressure, pH, salinity, temperature, fluid flow, and fluid pressure) during the corrosion tests. In a second step, the influence of the service conditions on corrosion will be studied. Two levels of temperature (25 o C and 85 o C), gasket contact pressure (4 MPa and 35 MPa), and flow rate (1.4 cm. s-1 and 4.5 cm. s-1) are considered in the study. The flange material selected in this study is stainless steel 304/304L since it has a wide application in the industry. Flexible graphite materials, commonly used due to their chemical resistance, high-temperature capability, low cost, and good sealing properties, are used in the corrosion tests. Two direct current electrochemical test techniques, polarization resistance (Rp) and potentiodynamic anodic polarization, are carried out, according to ASTM G5, to measure the corrosion rate in addition to other quantification methods based on visual observations and mass loss. These tests are conducted using the novel designed setup that consists of a working electrode (flange material), a reference electrode (Ag/AgCl), and an auxiliary electrode (a stainless-steel rod). The synthetic seawater solution recommended in ASTM D1141 is used for the corrosion tests. In a final step, the corroded surfaces of the specimens are examined via some of the following available techniques; confocal laser microscopy, scanning electron microscopy (SEM), energy-dispersive X-ray microscopy (EDS/EDX), and X-ray powder diffraction (XRD) techniques. Confocal microscopy is used to visualize the morphology of the damaged zones on the surface, and localize and quantify the crevices volume caused by corrosion, respectively. SEM and XRD analysis can reveal the scale morphology and phases present on the corroded plate surfaces. Comparing the results of the electrochemical tests and the microscopic studies will identify the influence of operating factors on the corrosion at the gasket-flange interface. Preliminary tests were performed to check the applicability of the novel setup for studying corrosion behaviour between gaskets and flanges and solve initial setup problems to get reproducible results. In the current research, the corrosion behaviour is studied under dynamic conditions. The majority of other works consider only the static condition, so it is important to run some preliminary tests to shakedown the rig and fixture and resolve unanticipated issues. First attempts failed due to noisy polarization curves that could not be used for corrosion analysis. After several experiments on small samples, it was decided to use filter paper immersed in a 3.5% NaCl solution as a salt bridge to reduce the distance between the reference and working electrodes in the setup. This resulted in smooth polarization curves useful for further corrosion analysis (Fig. 1). The novel designed bolted flange joint setup allows corrosion monitoring and characterization under dynamic operating conditions for the first time. Figure 1
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9

Romanіuk, Volodymyr, and Volodymyr Suprunіuk. "Influence of rigidity of a flange ridge knot of a double hinged arch on the redistribution of efforts in its elements." Strength of Materials and Theory of Structures, no. 106 (May 24, 2021): 236–46. http://dx.doi.org/10.32347/2410-2547.2021.106.236-246.

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Анотація:
The theoretical determination of the actual stiffness of the ridge knot of a steel perforated arch was carried out using the initial parameter method, which made it possible to calculate the stress in the upper reference section of the structure belt. The application of the proposed calculation method makes it possible to determine the rigidity of the bolted flange connection, taking into account its actual operation, and to change it by changing the geometrical parameters of the nodal details, that is, the diameter of the bolts or the thickness of the flanges.It is marked that in the calculation of building constructions an important value has exact determination of boundary conditions of connection of nodal elements, that substantially influences on the redistribution of efforts in the separate elements of constructions on their length and rigidity of knots. Especially it touches of flange bolted joints. Current design rules use idealized schemes of nodal joints, which, according to numerical researches, do not fully correspond to the actual operating conditions of nodal joints and constructions on the whole. For realization of aim of researches, that is, theoretical determination of rigidity of ridge knot of the steel preliminary tense perforated arch, the method of initial parameters is used, which allowed to define theoretical tensions in the supporting cut of fastening upper belt to the ridge knot of arch. Divergence in the values of actual tensions in the cuts of beam and theoretical, calculated according to the current design rules, is explained by the flexibility of the flanged bolted joints, that due to the actions in the knot of bending moment opens up, although in theoretical calculations this joint is accepted by absolutely rigid. Rigidity depends on the thickness of flanges, diameter of bolts, the distances between them, the values of the previous tension of the bolts and external loading. The conclusion is set forth, that the application of the offered methodology of calculation allows to define the rigidity of the bolted flanged joint taking into account its actual work, and which, according to experimental researches and theoretical calculations, differs from the idealized calculation schemes. In addition the proposed methodology allows to change the rigidity of the bolted jont, changing the diameter of the bolts or the thickness of the flanges, and also to use the additional resource of material due to some reduction of the maximum tensions in weak cuts of elements.
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10

Bouzid, Abdel-Hakim, and Akli Nechache. "Thermally Induced Deflections in Bolted Flanged Connections." Journal of Pressure Vessel Technology 127, no. 4 (May 29, 2005): 394–401. http://dx.doi.org/10.1115/1.2042476.

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Анотація:
Pressure vessel joints operating at high temperature are often very difficult to seal. The existing flange design methods do not address thermal effects other than the variation of flange material mechanical properties with temperature. It is possible to include the effects of temperature loading in joint analysis, however, presently very few guidelines exist for this type of analysis. This paper outlines the theoretical analysis used for the determination of the steady state operating temperature and deflections in bolted flange joints. It details the theoretical equations necessary to predict the temperature profiles and thermal expansion difference between the joint components necessary for the evaluation of the load redistribution for the two cases of a flange pair and a flange with a cover plate. The results from the theoretical models are verified by comparison to finite element results.
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Більше джерел

Дисертації з теми "Bolted Flange Joint"

1

Bond, Douglas Edward. "Analytical and experimental investigation of a flush moment end-plate connection with six bolts at the tension flange." Thesis, Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/76341.

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Анотація:
An analytical and experimental investigation was conducted to study the six bolt flush moment end-plate connection configuration which is used in steel frame construction. The limit states of plate yielding and bolt fracture were analyzed using yield-line theory to predict endplate thicknesses and a split-tee analogy to develop a method to predict bolt forces. Five experimental tests were conducted on four configurations within a matrix of geometric parameters. The predicted ultimate moment showed good . correlation to the yield moment obtained from the experimental deflection plots. The experimental bolt forces correlated well with the predicted bolt forces when plotted versus the applied moment. Additionally, an equation to model the moment-rotation relationship was developed from a regression analysis to determine the construction type suitable for a given connection configuration. Finally, a method of designing the six-bolt flush end-plate configuration is presented and an example given.
Master of Science
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2

Do, Tan Dan. "The effect of bolt spacing on the tightness behavior of bolted flange joints." Mémoire, École de technologie supérieure, 2012. http://espace.etsmtl.ca/964/1/DO_Tan_Dan.pdf.

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Анотація:
Les assemblages à brides boulonnées munis de joints d’étanchéité sont les systèmes de raccordement les plus répandus entre les différents éléments des réservoirs sous pression. Ils sont largement utilisés dans l'industrie chimique, pétrochimique et nucléaire. Ce sont des structures simples et des assemblages démontables. Ce qui les rend plus attractifs pour connecter des équipements sous pression et la tuyauterie. En plus des risques de fuite, ils ont besoin de maintenance en cours de fonctionnement au cas où les boulons doivent être resserrés ou dévissés pour être remplacés. Bien que les arrêts de fonctionnement coûteux soient à éviter, l’entretien en fonctionnement expose l'opérateur à un risque potentiel, car le desserrement d’un boulon peut produire un déséquilibre de la contrainte de compression sur le joint d’étanchéité entraînant un contact local du joint d’étanchéité en dessous d’une certaine valeur critique, provoquant une fuite majeure et de ce fait pouvant mettre en péril la vie de l'opérateur. Cette proposition aborde la question de la variation de la déflexion du rebord de la bride afin d'enquêter sur le déséquilibre de la contrainte de compression dans le joint lorsque les boulons sont soumis à une modification de charge en fonctionnement. Cette étude peut être utilisée pour aider à limiter l'augmentation de la charge de serrage ou le nombre maximum de boulons qui doivent être remplacés en même temps et identifier les boulons qui ne peuvent pas être remplacés en service. L'objectif de cette étude est de développer une approche théorique pour identifier et analyser les effets de la charge précontrainte et de la pression sur les assemblages à brides boulonnées afin d’obtenir l'espacement optimal entre les boulons en fonction de la variation de la contrainte de compression sur le joint d’étanchéité. Notre recherche comprend trois parties. La première partie qui est une méthode analytique basée sur la théorie de la poutre circulaire reposant sur une fondation élastique linéaire, sera développée pour prédire la distribution circonférentielle de la contrainte de compression sur le joint d’étanchéité. Des modèles éléments finis de brides boulonnées symétriques seront créés pour valider cette analyse. Une comparaison des résultats d'études antérieures est nécessaire pour valider la solution analytique linéaire. Ensuite, la deuxième étape de cette recherche consiste en une approche qui a été construite à partir de la théorie de l'anneau sur le comportement d’une fondation non linéaire élastique, permettant d’obtenir des résultats plus précis. La solution non-linéaire doit être validée avec une analyse par la méthode des éléments finis. Dans la troisième partie, un modèle de régression linéaire pour des brides boulonnées sera proposé pour une procédure de calcul d’espacement de boulons. Ce travail aidera les services techniques sur la conception, la maintenance et l'exploitation des réservoirs sous pression et systèmes de tuyauterie.
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3

Berrington, Rosalind. "Analytical methods for the analysis of bolted flanged joints in aero-engine structures." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496825.

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Книги з теми "Bolted Flange Joint"

1

Green, Deborah L. Design of web-flange beam or girder splices. Edmonton, Alta: Dept. of Civil Engineering, University of Alberta, 1987.

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2

1957-, Bouzid Abdel-Hakim, Sawa T, Kockelmann H, American Society of Mechanical Engineers. Pressure Vessels and Piping Division., and Pressure Vessels and Piping Conference (2004 : San Diego, Calif.), eds. Analysis of bolted joints--2004: Presented at the 2004 ASME/JSME Pressure Vessels and Piping Conference : San Diego, California, USA, July 25-29, 2004. New York, N.Y: American Society of Mechanical Engineers, 2004.

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3

H, Hsu K., Sawa T, American Society of Mechanical Engineers. Pressure Vessels and Piping Division., and Pressure Vessels and Piping Conference (2001 : Atlanta, Ga.), eds. Analysis of bolted joints, 2001: Presented at the 2001 ASME Pressure Vessels and Piping Conference, Atlanta, Georgia, July 23-26, 2001. New York, N.Y: American Society of Mechanical Engineers, 2001.

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4

H, Hsu K., Kockelmann H, Sawa T, American Society of Mechanical Engineers. Pressure Vessels and Piping Division., and Pressure Vessels and Piping Conference (2002 : Vancouver, B.C.), eds. Analysis of bolted joints--2002: Presented at the 2002 ASME Pressure Vessels and Piping Conference : Vancouver, British Columbia, Canada, August 5-9, 2002. New York, New York: American Society of Mechanical Engineers, 2002.

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5

(Editor), A. Bouzid, T. Sawa (Editor), and Abdel-Hakim Bouzid (Other Contributor), eds. Analysis of Bolted Joints--2003: Presented at the 2003 Asme Pressure Vessels and Piping Conference: Cleveland, Ohio, July 20-24, 2003. American Society of Mechanical Engineers, 2003.

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Частини книг з теми "Bolted Flange Joint"

1

Alzakri Ekhwan, Ir, A. R. Othman, Andre Franzen, M. F. Othman, and Azliza Ishak. "Leakage Quantification of Bolted Flange Joint Subjected to Different Bolt Sizes and External Load." In Lecture Notes in Mechanical Engineering, 741–52. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1939-8_57.

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2

Joshi, Tanuj, Ravikant Sharma, Om Parkash, and Aaditya Gupta. "Design and Analysis of Metal-To-Metal Contact Bolted Flange Joint Using FEA Tool." In Lecture Notes in Mechanical Engineering, 315–25. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4684-0_32.

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3

Cao, J. J., and A. J. Bell. "Prying action in bolted circular flange joints in tubular structures." In Tubular Structures VII, 107–13. London: Routledge, 2022. http://dx.doi.org/10.1201/9780203735008-18.

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4

Cao, J. J., and A. J. Bell. "Prying action in bolted circular flange joints in tubular structures." In Tubular Structures VII, 107–13. London: Routledge, 2022. http://dx.doi.org/10.1201/9780203735008-18.

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5

Soleimanpour, Reza, Alex Ng, Abbas Amini, and Sayed Mohammad Soleimani Ziabari. "Application of Nonlinear Guided Waves for Detecting Loose Flanged Bolted Joints in Pipelines." In Lecture Notes in Civil Engineering, 129–39. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64594-6_14.

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6

"of Flange Component Models." In Handbook of Bolts and Bolted Joints, 368–70. CRC Press, 1998. http://dx.doi.org/10.1201/9781482273786-109.

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7

"5. Calculation of Flange Stresses." In Handbook of Bolts and Bolted Joints, 376–77. CRC Press, 1998. http://dx.doi.org/10.1201/9781482273786-111.

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8

"of Specifications for Standard Steel Flanges." In Handbook of Bolts and Bolted Joints, 360–61. CRC Press, 1998. http://dx.doi.org/10.1201/9781482273786-107.

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9

"of fatigue or loosening. Further advantages result from reduced flange rotation as a." In Handbook of Bolts and Bolted Joints, 362–67. CRC Press, 1998. http://dx.doi.org/10.1201/9781482273786-108.

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10

"Bolted-Flange Joints and Connections." In Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 2, Third Edition, 759–94. ASME Press, 2009. http://dx.doi.org/10.1115/1.802700.ch40.

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Тези доповідей конференцій з теми "Bolted Flange Joint"

1

Kumakura, Susumu, and Kumiko Saito. "Tightening Sequence for Bolted Flange Joint Assembly." In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-1867.

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Анотація:
Bolted flange joint assembly has been widely used in chemical and nuclear plants. Insufficient bolt loads in the bolted flange joints lead to serious accidents. The insufficient bolt loads are due to inappropriate bolt tightening methods in many cases. In order to obtain target bolt loads by the torque control method, it is especially important to know a torque coefficient and an appropriate tightening sequence. Another problem exists because where mating flanges are tightened by multiple bolts. It is known that it is extremely difficult to obtain a uniform bolt loads among the multiple bolts. In this study, new and any experimentally examined, tightening sequences for the bolted flange joints using multiple bolts are proposed. As a result, the proposed tightening method was proved to be more effective than that by the ASME method.
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2

Nechache, Akli, and Abdel-Hakim Bouzid. "Creep Effect of Attached Structures on Bolted Flanged Joint Relaxation." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71038.

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Анотація:
The leakage tightness behavior of bolted flange joints is compromised due to high temperature effects and in particular when creep of the materials of the different components of the bolted flanged joint take place. The relaxation of bolted flanged joints is often estimated from the creep of the gasket and the bolts. The creep behavior of the flange ring and the attached structures such as the shell and the hub is often neglected. Apart from an acknowledgement of relaxation due to creep, the designer has no specific tools to accurately assess this effect on the bolt load relaxation. The objective of this paper is to present an analytical approach capable of predicting the bolt load relaxation due to creep of the attached structures. The proposed approach is validated by comparison with 3D FE models of different size flanges. An emphasis will be put towards the importance of including creep of the attached structures in high temperature flange designs.
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3

Tsuji, Hirokazu, and Makoto Nakano. "Bolt Preload Control for Bolted Flange Joint." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1094.

Повний текст джерела
Анотація:
Tightening method for flange joints proposed by ASME PCC-1 specifies that bolts are tightened by the cross-pattern sequence and tightening torque is raised with several steps. On the other hand, new tightening method has been proposed by Japan BFC committee, in which bolts are tightened in the clockwise-pattern sequence and tightening torque is 100% of the target torque in all steps after an install step with some snug torque. Tightening tests using flanges with various nominal sizes, performed in this study, show that the new tightening method achieves comparable uniformity in bolt preloads and in flange alignment with ASME PCC-1 procedure. This new tightening method is able to reduce both the work volume in the tightening operation and the possibility of human errors like missing the tightening order in it. Step-like increment of the bolt tension under the repeated tightening with small increment of the tightening torque is also discussed. Experimental results show that continuous control of the bolt tension by the repeated tightening is impossible. The step-like increment of the bolt tension is observed in the tightening process of the actual bolted flange joints so that the excessive iteration of the repeated tightening round hardly improves the uniformity of the bolt preloads.
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4

Kaneda, Shinobu, and Hirokazu Tsuji. "Application of Plastic Region Bolt Tightening to Flange Joint Assembly: Behavior of Large Diameter Flange." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77727.

Повний текст джерела
Анотація:
In the past study the plastic region tightening has been applied to the bolted flange joint with smaller nominal diameter and its advantages have been demonstrated, however, behavior of the bolted flange joint with larger diameter is not investigated. Flange rotation of the bolted flange joint with large diameter increases when the internal pressure is applied. Gasket stress is not uniform and it may cause leak accident. So, it is necessary to investigate the behavior of the larger diameter flange. The present paper describes the behavior of bolted flange joint with large diameter under plastic region tightening. Firstly, API 20-inch flange joint tightened to the plastic region by bolt with a smaller diameter and superiority in the uniformity of the axial bolt force is demonstrated. And then the internal pressure is applied to the bolted flange joint and the behavior of the additional axial bolt force is demonstrated. The axial bolt force decreases with increasing the internal pressure, and the load factor is negative due to increasing of the flange rotation. However, the load factor of the bolted flange joint tightened to the plastic region by using the bolt with the smaller diameter approached zero. Using the bolts with smaller diameter is advantageous to the flange joint with the larger diamter, whose load factor is negative, to prevent the leakage. Additionally, the leak rate from the bolted flange joint is measured and the sufficient sealing performance is obtained.
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5

Nechache, Akli, Abdel-Hakim Bouzid, and Van Ngan Leˆ. "Analytical Modeling of a Bolted Flange Joint Subjected to Creep Relaxation." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49243.

Повний текст джерела
Анотація:
Bolted flanged gasketed joints are the weak link between pressure vessel equipments including nuclear reactors. Their leakage tightness behavior is compromised due to the effect of creep of the gasket, the bolts and the flange, which relaxes the bolt load and causes a subsequent loss of the gasket contact stress. This is especially true when the joint is operating under high pressure and high temperature conditions. Apart from an acknowledgement of this affect, the ASME code does not give specific guidelines to help the design engineer in assessing this effect. The objective of this paper is to present an analytical method capable of predicting the bolt load relaxation in a gasketed joint as a result of creep of either the gasket, the bolt and the flange separately or all together. The proposed method is validated by comparison with 3D FE models of different size flanges and experimental data. A strong emphasis will be put on flange rigidity, which is the major controlling parameter of the load relaxation.
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6

Sawa, Shunichiro, Yasuhisa Sekiguchi, and Toshiyuki Sawa. "Finite Element Analysis of the Load Factor and Design for Bolted T-Shape Flange Joints Consisting of Dissimilar Clamped Parts." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87335.

Повний текст джерела
Анотація:
In the present paper, the load factor for bolted T-shape flange joints where two dissimilar material (steel-aluminum) of T-shape flanges are clamped by two bolts and nuts under external tensile loadings is examined using Finite Element analysis. Furthermore, the effect of the distance C between the center of the bolt and that of T-shape flange on the load factor and a load when the interfaces start to separate are examined. In addition, the mechanical characteristics of bolted T-shape flange joints where two clamped parts are steel and aluminum are examined. The value of the load factor for steel-aluminum T-flange joint is a little bit larger than that for steel-steel T-flange joints. When the external tensile loads are applied to the bolted T-shape flange joints, the bolts are inclined and as a result, the bending moment occurs in the bolts. A maximum bending stress in the bolts is also shown and it is about 6% larger than the bolt stress due to the load factor. For verification of FEM calculations, experiments to measure the load factor and the maximum bending stress occurred in the bolts are carried out. The FEM results are in a fairly good agreement with the experimental results. Finally, based on the obtained results, a design method for bolted joints with dissimilar T-shape flanges is demonstrated for determining the nominal bolt diameter and the bolt strength grade. It is found that the contact stress at the bearing surfaces of aluminum T-flange is critical.
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7

Ueno, Yoshio, Satoshi Nagata, Takashi Kobayashi, and Toshiyuki Sawa. "New Tightening Diagram for Bolted Flange Gasket Joints." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93541.

Повний текст джерела
Анотація:
Tightening diagrams have been well known and utilized to the design of bolted joints in wide applications. The tightening diagram is conceptually illustrated by using two lines. One represents the relationship between the bolt force and the bolt elongation, the other represents that of the clamping force and the compressive displacement of the clamped body. The tightening diagram also gives the changes of the bolt force and the compressive force when an external force exerts on the bolted joints after assembled. However, the tightening diagrams have a limitation in application only for the joints without gaskets. The tightening diagram is not possible to apply directly to the bolted flange gasket joints since the joint do not behave as non-gasketed joints due to the gasket inserted and the configurations bolts locate outside the ring gasket. This paper proposes a new tightening diagram for bolted flange gasket joints. The new tightening diagram consists of mainly three lines. Two lines represent the displacement of flange at the gasket reaction point due to pressure thrust and gasket load, respectively. The remaining shows the loading-unloading curve of the gasket. By the combination of these lines, the behavior of bolted flange gasket joint is conceptually illustrated and the changes of the bolt force and the gasket load is shown. The paper gives a detailed explanation of the new tightening diagram.
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8

Koves, William J. "Flange Joint Bolt Spacing Requirements." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26089.

Повний текст джерела
Анотація:
The bolted flange joint assembly is a complex system. System stresses are dependent on elastic and nonlinear interaction between the bolting, flange and gasket. The ASME Code design rules provides a method for sizing the flange and bolts to be structurally adequate for the specified pressure design conditions and are based on an axi-symmetric analysis of a flange. The ASME rules do not address the circumferential variation in gasket and flange stress due to the discrete bolt loads. Proper bolt spacing is important to maintain leak tightness between bolts and to avoid distorting the flange. This paper provides an analytical solution for the gasket and flange stress variation between bolts. The analytical solution is validated with 3-D Finite Element solutions of standard flange designs.
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9

Bouzid, Abdel-Hakim, and Akli Nechache. "Creep Modeling in Bolted Flange Joints." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2621.

Повний текст джерела
Анотація:
Bolted flanged connections are used extensively in the petrochemical and nuclear industries. Under high temperatures, their leakage tightness behavior is compromised due to the loss of load as a result of creep of not only the gasket material but also the bolt and the flange materials. The relaxation of the bolt load and the corresponding loss of the gasket contact stress are not easy to assess analytically and consequently there is no established design calculation procedure. The objective of this paper is to present an analytical method that is part of the SuperFlange program [1] and is capable of predicting the load relaxation in a bolted joint when subjected to flange, bolt and gasket creep. The proposed method is validated by comparison with 3D FE models of different size flanges. In some cases, the relaxation caused by the flange and bolt materials is shown to be significant.
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10

Zhao, Zijian, Rahul Palaniappan Kanthabhabha Jeya, and Abdel-Hakim Bouzid. "Creep Modeling of Polyvinyl Chloride Bolted Flange Joints." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-72406.

Повний текст джерела
Анотація:
Alike other polymer material, PolyVinyl Chloride (PVC) shows a clear creep behavior, the rate of which is influenced by temperature, load and time. Polyvinyl chloride bolted flange joints undergo relaxation under compression for which the material creep properties are different than those under tension. Since the sealing capacity of a flanged gasketed joint is impacted by the amount of relaxation that takes place, it is important to properly address and predict the relaxation behavior due to flange creep under compression and reduce the chances of leakage failure of PVC flange joints. The main objective is study the creep behavior of PVC flanges under the influence of normal operating conditions. This is achieved by developing a PVC creep model based on creep test data under various compressive load, temperature and time. A simulation of a PVC flange relaxation behavior bot numerically and experimentally is conducted on an NPS 3 class 150 bolted flange joint of dissimilar materials one made of PVC material and the other one by steel SA105. The study also provides a clear picture on how the compression creep data on Ring specimen may be utilized for predicating the flange performance under various operating temperatures with time.
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Звіти організацій з теми "Bolted Flange Joint"

1

NUMERICAL STUDY OF TWO NOVEL CONNECTIONS WITH SHORT END I OR H STUB IN STEEL STRUCTURES. The Hong Kong Institute of Steel Construction, March 2022. http://dx.doi.org/10.18057/ijasc.2022.18.1.8.

Повний текст джерела
Анотація:
In this study, two novel steel connections are introduced by replacements in the conventional end-plate connection with an H-or I-shaped cross-section as a Short Stub Column (SSC). In the first connection, the SSC flange is bolted to the column flange, and the beam is welded to the stub flange. In the second connection, after welding the SSC flange to the column flange and welding the beam to an end-plate, the end-plate is bolted to the SSC flange. The flange and web of the stub are reinforced using horizontal stiffeners to transfer the beam moment. Stiffeners could be employed with various thicknesses and configurations such that the strength and ductility of the joint could be adjusted. In this study, the Finite Element Model (FEM) model of a conventional welded and bolted end-plate connection, subjected to cyclic loading, is primarily calibrated using experimental data from previous studies. After confirming the model's performance, the behavior of the two proposed connections, in comparison with it, has been studied. The hysteresis diagrams have been obtained for each case, followed by extracting the effective parameters and comparing them. The results show that the two Proposed Connections reduce the stress in the panel zone and increase the ductility compared to the previously confirmed end-plates. All the samples in this study satisfy the fundamental requirements for rigid beam-to-column connections, according to AISC.
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2

CALCULATION OF THE RESISTANCE WITH DIFFERENT STIFFNESS CONNECTIONS AGAINST PROGRESSIVE COLLAPSE BASED ON THE COMPONENT METHOD. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.108.

Повний текст джерела
Анотація:
"The collapse performance of steel frames generally depends on their ability to resist local damage, however, this ability depends on the behaviour of beam-to-column connections that have not yet to be identified in a methodical and reliable manner. Thus, it is critical to develop a simplified joint model, which could predict the structural collapse resistance to prevent progressive collapse. In this study, component models with different stiffness connections, namely the double web angle (DWA) connection, top-seat with double web angle connection (TSDWA) and welded flange-bolted web connection (WUF) were constructed based on the component method by simplifying its geometry and dividing into a number of basic springs. The proposed component-based connections models with detailed components were implemented within the finite element programme ANSYS, and the models were validated against previously experimental tests. The analysis results show that the component models can accurately reflect the load response and post-fracture path of the substructures with a cost-effective solution, which indicated that the component method has great theoretical significance and applicable value in progressive collapse analysis, and provided a simple and effective tool for the engineers to calculate the progressive collapse resistance."
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3

EXPERIMENTAL STUDY AND NUMERICAL ANALYSIS ON SEISMIC BEHAVIOR OF ASSEMBLED BEAM-COLUMN JOINTS WITH CSHAPED CANTILEVER SECTION (ID NUMBER: 197). The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.197.

Повний текст джерела
Анотація:
"A kind of assembled steel beam-column joint with C-shaped cantilever section was proposed. The influences of the lengths of cantilever sections and cover plates on seismic performance of the joints were discussed through low-cycle reciprocating loading tests and numerical simulations. Then the sensitivity analysis of key parameters such as thickness and width of flange plate ,bolt number and cover plate’s length were carried out. The results show that the joint consumed energy through warping deformations of end plate and the friction slippages between flange of beam, C-shaped cantilever section and cover plate. By reasonably increasing the lengths of C-shaped cantilevers section and cover plates, it can ensure that the joints have high bearing capacities, while significantly improving energy dissipation capacities of the joints. Parameter analysis showed that increasing thickness of the flange plate can effectively improve the stress concentration at root of the cantilever section. Reducing width of flange plate has a great impact on bearing capacity and initial stiffness of the joint with the maximum drop amplitude of 13.1% and 18.9%, respectively."
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