scholarly journals Finite Element Analysis of Bimetallic Layered Pressure Vessel using Ansys

2019 ◽  
Vol 9 (2S2) ◽  
pp. 378-382
Keyword(s):  
High Pressure ◽  
Power Plant ◽  
Pressure Vessel ◽  
Solid Wall ◽  
Thermal Power ◽  
Pressure Vessels ◽  
High Pressure Steam ◽  
Pressure Steam ◽  
Bimetallic Layer ◽  
Paper Work

This paper work discusses about the effect of bimetallic layer on pressure vessel with different heads. The main objective of this paper work is to design and analysis of bimetallic layered pressure vessels using analysis software. In this work analyses about stress concentration factor on bimetallic layer of pressure vessels wall. The pressure vessels are widely used in thermal, chemical industry, nuclear power plant. In thermal power plant or thermal related industry produces the high pressure steam in the pressure vessel, that high pressure steam is induced a stress on the vessel’s wall. So that, the pressure vessel wall is deformed due to high pressure. That deformation is analysis by ANSYS and Theoretical calculation. In this paper two different types of head are used, two different head shape are flat and hemispherical head. The stresses developed in the solid wall pressure vessel and the head of pressure vessel is also analyzed by ANSYS. The theoretical displacement value and ANSYS displacements value of bimetallic layers are compared. Based on the ANSYS analysis the better bimetallic layer is selected for pressure vessels fabrication.

Some Operating Experiences with High-Pressure Steam Power Plant

1949 ◽  
Vol 161 (1) ◽  
pp. 129-156 ◽  
Author(s):  
W. N. C. Clinch
Keyword(s):  
High Pressure ◽  
Power Plant ◽  
Radiographic Examination ◽  
Steam Power ◽  
High Pressure Steam ◽  
Steam Power Plant ◽  
Circulating Water ◽  
Pressure Steam ◽  
Alloy Steels ◽  
Early Performance

Between the years 1938 and 1944 the Northmet Power Company placed in commission four high-pressure steam power plant installations comprising 50 and 60 megawatt units at Brimsdown “A” and “B” Power Stations respectively, operating on the 1,900 lb. per sq. in., 930 deg. F. reheat cycle, and two 32 megawatt non-reheating units at Willesden Power Station, operating at 1,300 lb. per sq. in. and 950 deg. F. These cycles were selected for the respective sites from considerations of coal cost and of circulating water make-up facilities, both stations relying upon rail-borne coal supplies and operating with cooling towers. The capacity and design of the plant were largely determined by the available space, existing buildings being utilized to accommodate most of the new machines and auxiliaries. The pressure and temperature conditions involved consideration of creep characteristics in selecting suitable alloy steels for the pressure parts, and their mechanical properties were closely investigated before contracts were placed. Welding was extensively employed in boiler and pipework construction, and preliminary tests and subsequent radiographic examination presented many interesting problems. Early performance figures promised the achievement of the thermal efficiency to be expected from the cycles, and subsequent experience shows that, as indicated by theoretical considerations, the 1,300 lb. per sq. in. cycle is capable of equal or greater economy than the higher pressure with the reheating arrangements. Certain difficulties in operation have been encountered—not all inherently associated with high-pressure working. The paper gives an account of these difficulties and of the steps taken to surmount them. In the light of these operating experiences, the future of high-pressure steam power generation is discussed with comments on features which are considered essential to a successful design of plant. The initial ventures are felt to have been justified by results and by the contribution made to mechanical engineering in general. The present and future urgent need for coal for international barter calls for the fuller development of the use of high-pressure cycles, and experience to date warrants a continued advance toward their more general application.

scholarly journals Metallurgical Examination and Life Time Assesment of High Pressure Steam Pipes of a Palm Oil Processing Plant [Penelitian Metalurgi dan Analisa Umur Layan Pipa Uap Bertekanan Tinggi pada Sebuah Pabrik Pengolahan Minyak Kelapa Sawit]

Metalurgi ◽  
2019 ◽  
Vol 33 (3) ◽  
pp. 109
Author(s):  
D.N. Adnyana
Keyword(s):  
High Pressure ◽  
Palm Oil ◽  
Pressure Vessel ◽  
Life Time ◽  
Processing Plant ◽  
Processing Unit ◽  
High Pressure Steam ◽  
Oil Processing ◽  
Pressure Steam ◽  
Steam Pipes

Steel pipes are commonly used for transporting high pressure steam from a steam generating unit or boiler to a steam turbine or other processing unit. This paper presents a metallurgical examination performed on HP steam pipes of a newly constructed plant for transporting high pressure steam from a boiler to a palm oil processing plant. The aim was to assure that the material integrity of the steam pipes meet the intended specification and reliability. In addition, the aim was also to determine the estimated service life of the steam pipes. The metallurgical examination was conducted by preparing a number of specimens from the as-received three pieces of HP steam pipes. Various laboratory examinations were performed including chemical analysis, metallographic examination, hardness testing and tensile testing at 300 °C. In addition, a life-time analysis was also made using an equation based on the ASME Boiler and Pressure Vessel Code (BPVC) and data obtained from the API Standard 530. Results of the metallurgical examination obtained showed that the HP steam pipes which were made of ASTM A-106 Gr. B were all in good condition, either in microstructure or mechanical property. There were no any significant defect observed, and all the three HP steam pipes were assumed being ready to place in service. Under the intended operating pressure and temperature of 70 bar(g) and 300 °C (max), respectively it can be estimated that the HP steam pipes may likely reach some design life up to 25 years or more with the corrosion rate approximately 0.2 - 0.3 mm/year. AbstrakPipa baja sering digunakan untuk menyalurkan uap bertekanan tinggi dari sebuah ketel uap menuju ke unit turbin uap atau ke unit produksi lainnya. Tulisan ini menyajikan penelitian metalurgi yang dilakukan pada sejumlah pipa uap bertekanan tinggi pada sebuah pabrik yang baru dibangun untuk menyalurkan uap bertekanan tinggi dari sebuah ketel uap menuju ke pabrik pengolahan minyak ke-lapa sawit. Tujuannya adalah untuk memastikan bahwa keterpaduan material pipa uap memiliki kesesuaian dengan spesifikasi dan kehandalan yang diinginkan. Disamping itu, tujuannya juga ada-lah untuk memperkirakan umur layan pipa uap tersebut. Pengujian metalurgi dilakukan dengan mempersiapkan sejumlah benda uji yang diambil dari tiga potongan pipa uap yang diterima, yaitu meliputi : analisa kimia, uji metalografi dan uji kekerasan serta uji tarik pada suhu 300 °C. Disamping itu, analisa umur juga dibuat menggunakan persamaan yang diambil dari ASME Boiler dan BPVC (pressure vessel code) dan dari data standar API 530. Hasil pengujian metalurgi yang diperoleh menun-jukkan bahwa pipa uap bertekanan tinggi yang dibuat dari material ASTM A-106 Gr. B seluruhnya dalam kondisi baik, baik dari segi struktur mikro maupun dari segi sifat mekanis. Hasil pengujian juga menunjukkan bahwa pada struktur mikro tidak diketemukan adanya cacat yang berarti, dan seluruh (ke tiga) pipa uap yang di uji tersebut diperkirakan dalam keadaan siap untuk dioperasikan. Pada tekanan operasi 70 bar(g) dan temperatur operasi maksimum 300 °C yang direncanakan, diperkirakan bahwa pipa uap tersebut dapat memberikan umur desain hingga 25 tahun atau lebih dengan laju korosi 0,2 - 0,3mm/tahun.

Measurements of the Leakage Through a High Pressure Steam Turbine Power Plant Gland Seal

2017 ◽  
Author(s):  
Peter Stein ◽  
Dominik Born ◽  
Martin König
Keyword(s):  
High Pressure ◽  
Power Plant ◽  
Steam Turbine ◽  
Real Life ◽  
Test Rig ◽  
High Pressure Steam ◽  
Pressure Steam ◽  
Gland Seal ◽  
Real Plant ◽  
Plant Components

Today’s power market asks for highly efficient turbines which can operate at a maximum flexibility, achieving a high lifetime and all of this on competitive product investments. In line with the demands for reduction of CO2, the machine efficiencies are continuously increased. To further increase efficiencies, deeper insight into the single components is required to better understand the individual contributions to the overall performance. This work focuses on the measurement of leakages through High Pressure Steam Turbine gland sealing. Gland sealing technologies are frequently in focus of research and development activities. Various concepts were and are still developed and proven to work in test rigs. Typically such test rigs form an idealized environment with ideal manufacturing and low tolerances compared to real plant components. For this work real gland sealing components from a power plant were taken, a test rig developed around them and the different leakage path massflow rates determined. The advantage of using real plant components is i.e. in the real life relevance of the gained results by considering real design manufacturing tolerances, surface qualities etc.. By testing numerous gland segments from manufacturing and installing them in different orders, even statistical relevant information may be gained with respect to the influence of manufacturing on the seal tightness. This work presents the development of a test rig around a real plant gland seal and the tested leakages through the various paths of the tested component. The here gained information enables further development and optimization of advanced sealing technologies.

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