Improved performance of corrugated metal gaskets in boiler’s piping system through multilayered coating (original) (raw)
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ELECTROPLATING PROCESS FOR COPPER COATING OF CORRUGATED METAL GASKETS TO INCREASE PERFORMANCE
IAEME Publication, 2020
Corrugated metal gaskets made of SUS304 usually have extremely hard layers that contact the flange. Therefore, they must be designed with an outer covering of a softer material. For three-layer gaskets, however, this process is challenging. This paper proposes the coating of corrugated metal gaskets with copper to obtain softer layers and reports on the degree of adhesion of SUS304 with copper. The coating process employs the electroplating method. The results show that there are no cracks or breaches between the metal and copper, and these materials completely enclose SUS304. Cracks also do not occur after the gaskets have been used to seal flange leakage. Furthermore, the copper layers are likely to be durable, showing no changes between before and after use on the flange. The performance of coated corrugated metal gasket was better than standard corrugated metal gaskets.
Effect of Nickel Electroplating Time on Corrugated Metal Gaskets Performance
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin
Metal gaskets is an alternative to asbestor gaskets, but it still have many weaknesses. The main focus of this research is to find the optimal electroplating time to prevent leakage.This research was started with forming the gasket material, and then followed by coating process. The methode that used in coating proses was electroplating with nickel solution. The gasket material used SUS 304 sheet with 1,5 mm of thickness. Water pressure test was used to test leackage with 2 MPa, 4 MPa, 6 MPa, and 8 MPa presurre for 5 minute test duration. The result this research are (1) electroplating are effected by time, the longer time applied more nickel attached to the gasket, (2) the best performance on nickel electroplated gasket was on 32 minute and 45 second plating time, (3) electroplated nickel gasket performance was better than the original to prevent leakage from 2 to 8 MPa water pressure.
Sealing Performance Layered Metal Gasket Based on the Simulation Method
TEKNIK, 2020
Studies for corrugated metal gaskets are still ongoing to improve its performance. This is considered to be a single gasket with SUS304 material when contact with flanges that have greater surface roughness, reduced contact width and plastic deformed contact surfaces are incomplete and cannot fill the surface roughness of flanged flanges. The use of softer material than the base material as a surface covering material is used to improve the performance of the gasket. In this study, therefore the effect of modulus of elasticity ratio and thickness ratio on contact width and contact stress, 25A three-layer metal gasket was investigated using Finite Element Analysis. The results showed that the material with tangent modulus, Ehal = Eal / 150 had the highest slope for contact width. While the contact width of the plastic mode gasket is higher than the elastic mode gasket.
Development of an A1100 aluminum corrugated metal gaskets
Eastern-European Journal of Enterprise Technologies
Corrugated metal gaskets (CMG) made from SUS304 have previously been developed, however a coating process with a softer material is necessary for its design to be optimal. The coating process is time consuming and expensive. This research aims to develop CMG from aluminum by simulation analysis and form a CMG design made of aluminum A1100. The method used is development research. The optimum CMG thickness is analyzed using ANSYS Finite Element Analysis (FEA). The control variables being investigated are contact area and contact stress. The independent variable being investigated is the material thickness of CMG. An aluminum gasket is then constructed using a cold-forming process based on the optimum design. The control variables in the leak test are axial force and water pressure. Experiments were also carried out to test the aluminum gasket for leakage. A leakage test is carried out using a water pressure test. Simulation analysis showed results that were in line with experimental ...
Materials Today: Proceedings, 2020
At presently, the failure of a boiler is big hazard to the effectiveness of the boiler in the power plants. In coal fired boilers, erosion and corrosion at high temperature is responsible for the downtimes, which directly affect the economic loss. In the present review report, the current situation of combating the high temperature erosion and corrosion to the boiler surface has been discussed. The thermal spray coating techniques used for protecting the boilers has been studied in regard to the performance of different coating materials deposited using different coating methods. The performance of the developed coatings under high temperature oxidation has been reported. This article may help to researchers to select the best coating combination and method to resist the failure of boiler.
Development of New Metallic Gasket and its Optimum Design for Leakage Performance
Journal of Solid Mechanics and Materials Engineering, 2008
This paper introduces a new all-metal gasket that incorporates strategically located circumferential annular lips that form seal lines with the flanges. This gasket, named Super Seal Gasket, by virtue of its special shape, makes use of the material's spring effect, resulting in sealing performance. This change in approach, from the traditional one based on material development to one of mechanical design, brings with it the need for optimization of the different design parameters for leakage performance. We were able to develop an optimization methodology for this new product using the Taguchi method. As a test case, a 25A sized industrial gasket was optimized using this methodology. In FEM analysis, contact stress and deformation information was used to quantify leaking. Helium leak testing reveals considerable improvement in the sealing performance, hence verifying the applicability of the methodology developed. This work has proved that material development is not the only approach towards the development of new, more effective gaskets and novel gaskets, such as the one introduced in this study, have a useful part to play in the sealing of flanged joints.
Analysis Of Contact Width And Contact Stress Of Three-Layer Corrugated Metal Gasket
2017
Contact width and contact stress are important parameters related to the leakage behavior of corrugated metal gasket. In this study, contact width and contact stress of three-layer corrugated metal gasket are investigated due to the modulus of elasticity and thickness of surface layer for 2 type gasket (0-MPa and 400-MPa mode). A finite element method was employed to develop simulation solution to analysis the effect of each parameter. The result indicated that lowering the modulus of elasticity ratio of surface layer will result in better contact width but the average contact stresses are smaller. When the modulus of elasticity ratio is held constant with thickness ratio increase, its contact width has an increscent trend otherwise the average contact stress has decreased trend.
IOP Conference Series: Materials Science and Engineering, 2019
A corrugated metal gasket is not reusable once the plastic deformation has occured. Meanwhile, flange might be reusable if it has not corroded. This research aimed to find out the surface roughness and contour shape of the flange after being used to tighten the gasket. This study employed a method of measuring the surface roughness before and after the first, second, third, and fourth tightening. The flange used had a surface roughness of Ra 3.5µm, Ra 2.5 µm and Ra 1.5 µm. The measurement of surface roughness was based on the standard of JISB0601-2001. The findings show that no significant change occured on the flange surface roughness. However, the corrugated contour shape did occur in the surface roughness after use.