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Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 29 січня 2023

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Статті в журналах з теми "Gaskets Testing"

1

W. S., Widodo, R. Soenoko, M. A. Choiron, and A. A. Sonief. "Sealing performance analysis of composite gaskets made of silicone rubber filled with ramie natural fibers." Journal of Mechanical Engineering and Sciences 13, no. 4 (December 30, 2019): 6178–94. http://dx.doi.org/10.15282/jmes.13.4.2019.28.0484.

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Анотація:
Silicon rubber gaskets are commonly used in many industries for low pressure sealing conditions only. The research studies about the sealing performance improvement of a novel composite gasket made of the silicone rubber filled with ramie natural fibers in a bolted joint connection. In this research the sample of gasket consists of 4 different types of gasket i.e. a pure silicone rubber gasket and the silicone rubber composite gasket with 1, 2 and 3 layers of ramie fiber woven. The gaskets are tested using a water pressure testing equipment with a variation of internal fluid pressure and difference torques at 8 N.m, 12 N.m, 16 N.m and 20 N.m. The sealing performance is measured based on the maximum fluid pressure that can be hold by the gaskets before the fluid leaking occurred. The results show that the silicone rubber composite gaskets have better sealing performance comparing with the pure silicone rubber gaskets where the silicon rubber gaskets capable to hold the internal fluid pressure until around 5 times rather than pure silicon rubber gaskets (0.17 MPa comparing with 0.90 MPa). On the other hand the sealing performance of the composite gasket with 3 layers is almost 2 times better than the composite gasket with 1 layer and around 1.5 times better than the composite gasket with 2 layer of fiber woven.
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2

Chen, Jiayan, Zhenyu Zhang, Lu Wang, and Qiang Wang. "Evaluation of Gasket Surface Contact Stress Uniformity Based on Gray-Level Co-Occurrence Matrix." Applied Sciences 12, no. 21 (November 2, 2022): 11110. http://dx.doi.org/10.3390/app122111110.

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Анотація:
Due to the high demand for compression recovery tests of metal gaskets, it is difficult to provide and evaluate uniform stress on metal gaskets. To effectively evaluate the uniformity of surface stress on a metal gasket, we propose a method of evaluating gasket surface stress based on gray-level co-occurrence matrix theory. Angular second moment and entropy are selected as the main characteristic parameters, and the evaluation indexes (f1 and f2) are proposed. The analysis is based on finite element calculation under different parameters of a gasket test rig. The angular second moment and entropy curve of the stress distribution cloud map are drawn according to the result of finite element calculation. The results show that the method can evaluate the uniformity of stress distribution. The best parameters of the gasket testing rig are obtained by analyzing the uniformity evaluation index. The method can realize rapid comparison and accurate evaluation of the gasket surface stress.
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3

Wang, Min, Xianlei Fu, Zheyuan Jiang, Chi Che, Ningjun Jiang, and Yanjun Du. "Swelling Behavior and Flow Rates of a Novel Hydrophilic Gasket Used in Composite Geomembrane Vertical Cutoff Walls and Infrastructures Exposed to Contaminated Groundwater." Buildings 12, no. 12 (December 13, 2022): 2207. http://dx.doi.org/10.3390/buildings12122207.

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The swelling capacity of novel hydrophilic gaskets used in geomembrane cutoff walls and infrastructures is critical for decreasing the flow rates of contaminated groundwater. This study investigated the swelling behavior, relaxation characteristics, flow rates, and micro-morphology of a hydrophilic gasket with different testing liquids. The radial swelling tests were performed using a device modified from single-lever consolidation instrument. A flow rates model apparatus was manufactured and employed to measure the flow rates of the poor-sealing hydrophilic gasket. According to the test results, the swelling ratio of the hydrophilic gaskets soaked in the DIW were the highest, followed by the NaCl solution, the MSW landfill leachate, and the CaCl2 solution. Relaxation phenomena appeared in all the specimens regardless of the testing liquids. The flow rates of the specimens penetrated with DIW, NaCl, and CaCl2 decreased to a stable state, and then increased extremely slowly to stable values. Moreover, self-healing of the hydrophilic gasket was observed. The micro-morphology indicated that sodium polyacrylate (PAAS) with insufficient expansion could separate from the matrix under high multivalent ionic strength or loading pressure conditions. Therefore, it is critical to develop the modified hydrophilic gasket with resistance to contaminated groundwater for a better barrier performance for use in contaminated sites and infrastructures.
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4

Kunkel, G. M. "Shielding Effectiveness of EMI Gasketed Joints." Measurement and Control 24, no. 9 (November 1991): 282–85. http://dx.doi.org/10.1177/002029409102400903.

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EMI gaskets are used extensively by the electrical/electronic engineering community to assist in inhibiting the flow of radiated electromagnetic fields into and out of electronic equipment. Shielding effectiveness tests are used extensively by the manufacturers of EMI gaskets to grade their products. The assumption made by the design engineering community is that the shielding effectiveness as presented in the data is what they will receive in their equipment. This assumption is not true due to the errors associated with the shielding effectiveness testing of the gaskets where errors of as much as 80 dB (10 000 times) can be represented. The paper describes briefly the problems associated with the shielding effectiveness test methods currently used and provides a detailed method of calculating the shielding effectiveness of an EMI gasketed joint using transfer impedance test data.
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5

Jaszak, Przemysław, and Łukasz Walencki. "Testing of the gaskets at liquid nitrogen and ambient temperature." Open Engineering 8, no. 1 (October 26, 2018): 329–36. http://dx.doi.org/10.1515/eng-2018-0036.

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Анотація:
Abstract The paper presents the results of the leakage measurements of bolted flanged joints operating at temperature of liquid nitrogen (77K) and ambient temperature. Three types of static gasket were tested. The results were presented in the form of a helium leakage rate as a function of its pressure. The measured data was discussed and compared with the leakage results obtained at the ambient temperature.
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6

Kobayashi, Takashi, Ryosuke Nogi, Koji Sato, and Syugo Goto. "Consideration of test methods for testing sealing behavior of gaskets." Proceedings of Yamanashi District Conference 2018 (2018): YC2018–082. http://dx.doi.org/10.1299/jsmeyamanashi.2018.yc2018-082.

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7

Walczak, R., J. Pawlicki, and A. Zagórski. "Tightness and Material Aspects of Bolted Flange Connections With Gaskets of Nonlinear Properties Exposed to Variable Loads." Archives of Metallurgy and Materials 61, no. 3 (September 1, 2016): 1409–16. http://dx.doi.org/10.1515/amm-2016-0231.

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Abstract The paper presents the problems regarding bolted flange connections with gaskets used in chemical, petrochemical and energy industry. The aim of the research is to present state of knowledge regarding pipelines and apparatus in industrial installations and rules and regulations regarding flange connections tightness. Additionally a calculation example regarding flange connection according to ASME VIII DIV 1 requirement and then detailed Finite Element Analysis presented; impact of nonlinear material properties (gasket loading unloading curves) on the connection tightness for complex loading programme is shown. It is finally concluded that in addition to usual design calculations more precise calculation is needed to fully verify behaviour of sealed connection at complex extreme variable loadings. Material aspect is very important at designing, testing, service and maintenance; taking it into consideration may avoid many problems related to safe exploitation.
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8

Hosseini, Payam, Sultan Alhomair, Zahra Faeli, Mohammad Pour-Ghaz, Mohammed Gabr, Detlef Knappe, and Cyrus Parker. "Degradation Model for the Tensile Strength of PVC and Rubber Gasket Materials Exposed to Benzene and PCE-Saturated Aqueous Solutions." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 2 (February 2020): 274–83. http://dx.doi.org/10.1177/0361198120906126.

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In this paper, a tensile strength degradation model is developed for polyvinyl chloride (PVC) pipe and three rubber gasket materials commonly used in stormwater drains and wet utilities; the degradation model considers exposure to a single contaminant at its saturation level. The contaminant considered included benzene and tetrachloroethylene (PCE) because of their prevalence. The materials considered are unplasticized Polyvinyl chloride (u-PVC) utilized as the pipe material, and three types of rubber gaskets: Polychloroprene (Neoprene-CR), Acrylonitrile (nitrile) butadiene rubber (Buna-N), and fluoroelastomer rubber (FKM—Grade A VitonTM). First, the degradation rates of these materials are experimentally quantified using accelerated testing; then using the experimental results and Williams–Landel–Ferry (WLF) method a degradation model is developed. Finally, a simplified method is introduced to relate the tensile strength degradation of PVC to the penetration rate of the contaminants.
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9

Noda, Nao-Aki, Masato Nagawa, Fumitaka Shiraishi, and Akifumi Inoue. "Sealing Performance of New Gasketless Flange." Journal of Pressure Vessel Technology 124, no. 2 (May 1, 2002): 239–46. http://dx.doi.org/10.1115/1.1464876.

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Анотація:
This paper deals with a new seal system between two flanges without using gaskets. The system includes a groove and an annular lip that is held by one of the flange with its highest point in contact with the other flange to form a seal line when the flanges are assembled. The condition whether the system leaks or not depends on the shape and dimension of the annular lip and its deformation during the contact. In this study, several gasketless flanges are prepared with different lip dimensions to investigate the contact and sealing condition through an experimental and FEM analyses. The analyses indicate that the conditions can be expressed in terms of the maximum contact stress and the plastic zone size when the flanges are assembled. The helium leak testing reveals that the gasketless flange has better sealing performance compared to conventional gaskets.
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10

Rosentel, William, and Peter Holst. "Case study: Compilation of doorwall designs for speech privacy." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 264, no. 1 (June 24, 2022): 538–45. http://dx.doi.org/10.3397/nc-2022-769.

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Анотація:
A common complaint in offices is meetings within enclosed rooms disrupting nearby open workstations or poor speech privacy to circulation corridors. In this scenario, occupant satisfaction depends on multiple factors, including sound isolation of the wall, door, glazing, and the background noise levels. Using experience from several projects with collected measurement data, this presentation will review various door-wall design scenarios with post-construction testing results and conditions where day-two improvements were implemented to meet client standards. The limiting factor in sound isolation performance is often the door gaskets. Aluminum frames are commonly manufactured with integrated gaskets, which can be a cost-effective contractor replacement. However, these gaskets tend to be smaller than the typical recommended perimeter types and have been observed to form inconsistent seals once doors are installed. Floor transition strips for dropping bottom seals are another frequent coordination issue. Outside the enclosed room, coordination of the mechanical design and architectural ceiling choice should be used to define the appropriate corridor partition design to achieve acceptable outcomes. Where client standards and performance rating systems such as LEED and WELL define sound isolation criteria for corridor walls, a well-coordinated acoustical design is critical for achieving the credit objectives.
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Більше джерел

Книги з теми "Gaskets Testing"

1

Czernik, Daniel E. Gaskets: Design, selection, and testing. New York: McGraw-Hill, 1996.

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2

American Society for Testing and Materials. ASTM standards on gaskets. 4th ed. Philadelphia, PA: ASTM, 1988.

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3

Materials, American Society for Testing and. ASTM standards on gaskets. 6th ed. Philadelphia, PA: ASTM, 1993.

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4

American Society for Testing and Materials. ASTM standards on gaskets. 3rd ed. Philadelphia: ASTM, 1986.

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5

Payne, James R. Evaluation of test methods for asbestos replacement gasket materials. [Houston, Tex.]: National Association of Corrosion Engineers, 1990.

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6

Hall, A. M. Summary report on elevated temperature tests for asbestos-free gasket materials. [Houston? Tex.]: National Association of Corrosion Engineers, 1990.

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7

Engineers, Society of Automotive, ed. Gasket design, testing, sealing. Warrendale, PA: Society of Automotive Engineers, 1988.

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8

Czernik, Daniel E. Gasket: Design, Selection, and Testing. McGraw-Hill Professional, 1995.

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9

Czernik, Daniel E. Gasket: Design, Selection, and Testing. McGraw-Hill Professional, 1995.

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10

1999 Annual Book of Astm Standards: Rubber Products, Industrial Specifications and Related Test Methods; Gaskets; Tires (Annual Book of a S T M Standards. Volume 09.02.). Astm Intl, 1999.

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Частини книг з теми "Gaskets Testing"

1

Kunkel, George M. "Transfer Impedance Testing of EMI Gaskets." In Shielding of Electromagnetic Waves, 61–65. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-19238-9_15.

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2

Kunkel, George M. "Test Methods for Testing EMI Gaskets: A Review of IEEE 1302." In Shielding of Electromagnetic Waves, 57–60. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-19238-9_14.

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3

Hirschvogel, Alfred. "Testing Of Gaskets In A Din Flange Before And After Exposure At Elevated Temperature." In Fluid Sealing, 225–34. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2412-6_15.

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4

Swartz, S., H. Lum, M. McRae, D. J. Curtis, and J. Shamma. "Structural design and testing of a bolted and gasketed pre-cast concrete segmental lining for high external hydrostatic pressure." In North American Tunneling 2002, 151–60. CRC Press, 2021. http://dx.doi.org/10.1201/9781003211341-23.

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5

"replaceable gaskets, which separate the revolving stator from the drive shaft. Dual cones with connecting enclosure designs are usually able to pump out any residual material as long as that material has not dried. In that case, cleaning may actually be more dif-ficult than cleaning of other rotor/stator mixers since there is no way to open the head. Soaking the mixing head in hot soapy water while running is the best method of clean-ing here. The relative simplicity of rotating rotor/stator mixers provides several attractive points. If their capabilities can be shown through testing in the laboratory and pilot plant to meet the requirements of the process, they have their place in making dispersed products." In Pharmaceutical Dosage Forms, 347–49. CRC Press, 1998. http://dx.doi.org/10.1201/9781420000955-45.

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Тези доповідей конференцій з теми "Gaskets Testing"

1

Baulch, Joel, Carlos D. Girão, José Veiga, and Scott Hamilton. "ASME B16.20 Jacketed Gaskets Performance Testing." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84907.

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Анотація:
Jacketed gaskets have widespread use in the industry. The current revision of ASME B16.20-2017 provides several details of jacketed gasket construction and dimensions for use on ASME B16.5 or ASME B16.47 flanges. However, it does not currently provide a testing protocol to evaluate the sealing performance of this gasket style. This paper reports sealability and compression results with distinct sizes of jacketed gaskets tested based on the protocol proposed in ASME B16.20 - Spiral Wound Gaskets Performance Testing.
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2

Kobayashi, Takashi. "Characterization of Sealing Behavior of Gaskets for the Leak Rate Based Design of Gasketed Bolted Flanged Connections." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61465.

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Анотація:
This paper discusses the sealing behavior of gaskets according to the gasket testing procedure HPIS Z104 established in Japan. The testing procedure consists of eleven gasket stress levels while the internal pressure is constant. It takes about 3 hours to complete one test, which is acceptable for gasket manufacturers. The test method is going to be effective as the Japanese Industrial Standard (JIS) soon. Several sheet gaskets and spiral wound gaskets were tested based on the test method HPIS Z104 and test results are compared and discussed in this paper. Based on the test results, experimental formulas are proposed to approximate the sealing behavior of gaskets. It is shown that the sealing behavior of gaskets can be well characterized using the proposed testing procedure and the experimental formulas. The formulas have the possibility of application to the design of gasketed bolted flanged connections. It is also shown that the sealing performance of spiral wound gaskets with graphite and PTFE fillers is as good as that of sheet gaskets under an equal gasket load.
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3

Hamilton, Scott, Joel Baulch, and José Veiga. "ASME B16.20 Spiral Wound Gaskets Performance Testing." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65371.

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Анотація:
Spiral Wound Gaskets have widespread use in the Process Industry, with adequate results in both piping and equipment applications. The current revision of ASME B16.20-2012 provides several details of gasket construction and dimensions. Paragraph 3.2.6 of the referenced standard has been the object of many discussions, and some question its effectiveness since it does not assure a suitable sealing performance. This paper proposes to address this issue showing results of sealability tests with many different sizes of gaskets. It also proposes a test protocol that could eventually rewrite Paragraph 3.2.6 with a protocol for sealability in addition to the compression evaluation.
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4

Kobayashi, Takashi. "Measurements and Evaluation of Sealing Behavior of Gaskets Based on the Test Method HPIS Z104 Proposed in Japan." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26407.

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Анотація:
This paper discusses the gasket testing procedure HPIS Z104 established in Japan to obtain fundamental sealing behavior of gasket. The testing procedure consists of 11 combinations of gasket stresses and a constant internal pressure. It takes about 3 hours to complete one test, which is acceptable for gasket manufacturers. In order to demonstrate the validity of the testing procedure, measurements of leak rates of several types of sheet gaskets are carried out. Experimental formulas are proposed to approximate the sealing behaviors of gaskets. It is shown that the sealing behavior of gaskets can be well characterized using the proposed testing procedure and the experimental formulas.
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5

Kunkel, George. "Historical methods of testing EMI gaskets." In 2014 IEEE Symposium on Product Compliance Engineering (ISPCE). IEEE, 2014. http://dx.doi.org/10.1109/ispce.2014.6842002.

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6

Veiga, Jose´ C., Nelson Kavanagh, and David Reeves. "Heat Exchanger Gaskets Radial Shear Testing." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61121.

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Due to the high incidence of leaks in Shell and Tube Heat Exchanges that are in thermal cycling service, there have been studies of the suitability of gasket styles for this kind of application. This paper researches several gasket styles in a test rig developed to simulate the radial shear caused by the differential thermal expansion of the flanges in a Heat Exchanger.
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7

Tsuji, Hirokazu, Takashi Honda, Atsushi Yamaguchi, Takashi Kobayashi, and Toshiyuki Sawa. "Evaluation of Sealing Behavior of Gaskets at Elevated Temperature Based on the Test Method HPIS Z105 Proposed in Japan." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77846.

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Анотація:
A method to test the sealing performance of gaskets at elevated-temperatures, HPIS Z105, will be published soon in Japan. This paper discusses the gasket testing procedure to obtain the sealing behavior of gasket at elevated-temperatures. This testing procedure extends the room-temperature gasket testing procedure HPIS Z104 to the elevated-temperatures. The purpose of this testing procedure is to evaluate the effect of a moderate exposure at the elevated-temperature on the sealing performance of the non-asbestos gasket. This testing procedure consists of 4 parts; pre-exposure room-temperature tightness test, aging exposure of gasket at elevated-temperature, stress cycling disturbances, and post-exposure room-temperature tightness test. In order to demonstrate the validity of the testing procedure, measurements of leak rates of several types of sheet gaskets and spiral wound gaskets are carried out. It has shown that the sealing behavior can be well characterized using the proposed testing procedure.
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8

Rice, Tim, and Jeffery Wilson. "Evaluating the Sealing Performance of Engineered PTFE Based Gaskets in Fiberglass Reinforced Plastic Flanges." In ASME 2022 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/pvp2022-80474.

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Анотація:
Abstract Proper gasket selection for fiberglass reinforced plastic (FRP) flanges is critical to the long-term success of the pipe system. However, very little focus is placed on evaluating the performance of low stress-to-seal, PTFE-based gaskets engineered to perform at the lower bolt loads/gasket stresses allowable on FRP flanges. In cooperation with a premier FRP piping/equipment manufacturer, this paper evaluates and compares the sealing performance of new gasket technologies/designs and commercially available low stress-to-seal, PTFE-based gaskets. To quantify the relative performance, each gasket style was tested to ASTM D5421 “Standard Specification for Contact Molded “Fiberglass” (Glass-Fiber-Reinforced Thermosetting Resin) Flanges”. Gaskets that passed the ASTM D5421 testing were then subjected to a mass leakage test to further classify each gasket style’s sealing/tightness performance. Given the current standard requirements, gaskets that did not pass the ASTM D5421 standard testing were determined not to be suitable for FRP service and thus were not subject to the subsequent mass leakage testing. By comparing the collected data using these metrics, the final result of this paper will provide end-users with a comprehensive method of evaluating gasket styles and provide guidance for proper gasket selection for FRP flange services.
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9

Kobayashi, Takashi. "A Rapid Testing Procedure to Characterize Fundamental Sealing Behavior of Gaskets." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71457.

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Анотація:
In this paper, a testing procedure to obtain fundamental sealing behavior of gasket is discussed. The testing procedure consists of 12 combinations of gasket stresses and internal pressures. It takes about 3 hours to complete one test, which is acceptable for gasket manufacturers. In order to clarify the validity of the testing procedure, measurements of leak rates of compressed fiber sheet gaskets were carried out and also experiments to check a detectable leak rate by the soapy bubble test were carried out separately. It has shown that the fundamental sealing behavior can be well characterized using the proposed testing procedure with reasonable time and cost.
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10

Hay, Clifford A., and Warren Brown. "Analysis and Testing of a Ring-Joint Flange." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28980.

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Анотація:
This paper presents results from analysis and testing of an NPS 20 CL600 ring-joint (RTJ) flange through assembly and a thermal cycle. Using a mock-up assembly, multiple gasket materials and types including conversion gaskets were tested to evaluate relative performance based on amount of bolt preload loss as measured through the use of load-indicating studs. To simulate field geometry, most tests included a spacer in the flange pair, which necessitated use of two (2) gaskets in the joint. ASME PCC-1-2010 [1] Appendix O calculations and finite element analysis (FEA) were also performed for comparison with the test results and for evaluation of options to improve flanged joint performance. Testing and analysis results are discussed, and learnings are documented.
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