Investigation on wall thinning and creep damage in boiler tube due to scale formation

Boiler is a closed vessel in which the water is heated up to convert it from the liquid phase to superheat steam at specified pressure by addition of heat. The tubes are operated continuously at high temperature due to the formation of scale which has lower conductivity than that of steel. The sc...

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Main Authors:	Begum, Shahida, Karim, A.N. Mustafizul, Shafi, M. A.
Format:	Article
Language:	English
Published:	Trans Tech Publications Ltd., Switzerland 2012
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://irep.iium.edu.my/26821/ http://irep.iium.edu.my/26821/ http://irep.iium.edu.my/26821/1/Boiler_Wall_Thinning_AMR%2321.pdf

id	iium-26821
recordtype	eprints
spelling	iium-268212012-11-20T08:58:47Z http://irep.iium.edu.my/26821/ Investigation on wall thinning and creep damage in boiler tube due to scale formation Begum, Shahida Karim, A.N. Mustafizul Shafi, M. A. TJ Mechanical engineering and machinery Boiler is a closed vessel in which the water is heated up to convert it from the liquid phase to superheat steam at specified pressure by addition of heat. The tubes are operated continuously at high temperature due to the formation of scale which has lower conductivity than that of steel. The scale can be formed for various reasons of which tube geometries, flue gas and steam temperature are prominent. The remaining wall thickness decreases due to the formation of scale which eventually causes failure of the boiler tubes. In this investigation an iterative technique was used to determine the temperature distribution across the tube with the increase of operating time. The operating time was considered up to 160,000 hours. The remaining life of the steam generator tube was found by finding hoop stress and Larson Miller Parameter from the Larson Miller Parameter curve for SA213-T22 material. The remaining life of the steam generator tube was used to find cumulative creep damage. By utilizing finite element modelling software, ANSYS 9/ ANSYS 11 the temperature distribution across the steam generator tube was evaluated. The temperature distribution along with Larson Miller Parameter predicted the oxide scale thickness. It was also observed that different input parameters have pronounced affect on the formation of oxide scale inside the steam generator tube. By increasing the heat transfer rate across the wall, the oxide scale thickness was increased more rapidly than normal condition. It was also observed that due to formation of scale the thermal conductivity in the boiler tubes was affected and the remaining life of boiler tubes was decreased and accelerated creep damage. Trans Tech Publications Ltd., Switzerland 2012-06-14 Article PeerReviewed application/pdf en http://irep.iium.edu.my/26821/1/Boiler_Wall_Thinning_AMR%2321.pdf Begum, Shahida and Karim, A.N. Mustafizul and Shafi, M. A. (2012) Investigation on wall thinning and creep damage in boiler tube due to scale formation. Advanced Materials Research, 538. pp. 1781-1784. ISSN 1662-8985 doi:10.4028/www.scientific.net/AMR.538-541.1781
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Begum, Shahida Karim, A.N. Mustafizul Shafi, M. A. Investigation on wall thinning and creep damage in boiler tube due to scale formation
description	Boiler is a closed vessel in which the water is heated up to convert it from the liquid phase to superheat steam at specified pressure by addition of heat. The tubes are operated continuously at high temperature due to the formation of scale which has lower conductivity than that of steel. The scale can be formed for various reasons of which tube geometries, flue gas and steam temperature are prominent. The remaining wall thickness decreases due to the formation of scale which eventually causes failure of the boiler tubes. In this investigation an iterative technique was used to determine the temperature distribution across the tube with the increase of operating time. The operating time was considered up to 160,000 hours. The remaining life of the steam generator tube was found by finding hoop stress and Larson Miller Parameter from the Larson Miller Parameter curve for SA213-T22 material. The remaining life of the steam generator tube was used to find cumulative creep damage. By utilizing finite element modelling software, ANSYS 9/ ANSYS 11 the temperature distribution across the steam generator tube was evaluated. The temperature distribution along with Larson Miller Parameter predicted the oxide scale thickness. It was also observed that different input parameters have pronounced affect on the formation of oxide scale inside the steam generator tube. By increasing the heat transfer rate across the wall, the oxide scale thickness was increased more rapidly than normal condition. It was also observed that due to formation of scale the thermal conductivity in the boiler tubes was affected and the remaining life of boiler tubes was decreased and accelerated creep damage.
format	Article
author	Begum, Shahida Karim, A.N. Mustafizul Shafi, M. A.
author_facet	Begum, Shahida Karim, A.N. Mustafizul Shafi, M. A.
author_sort	Begum, Shahida
title	Investigation on wall thinning and creep damage in boiler tube due to scale formation
title_short	Investigation on wall thinning and creep damage in boiler tube due to scale formation
title_full	Investigation on wall thinning and creep damage in boiler tube due to scale formation
title_fullStr	Investigation on wall thinning and creep damage in boiler tube due to scale formation
title_full_unstemmed	Investigation on wall thinning and creep damage in boiler tube due to scale formation
title_sort	investigation on wall thinning and creep damage in boiler tube due to scale formation
publisher	Trans Tech Publications Ltd., Switzerland
publishDate	2012
url	http://irep.iium.edu.my/26821/ http://irep.iium.edu.my/26821/ http://irep.iium.edu.my/26821/1/Boiler_Wall_Thinning_AMR%2321.pdf
first_indexed	2023-09-18T20:39:53Z
last_indexed	2023-09-18T20:39:53Z
_version_	1777409293930201088

Investigation on wall thinning and creep damage in boiler tube due to scale formation

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