Critical Failure Strain of Oxide Scale in Boiler Austenitic Tubes

Yeo Wei Hong; Mohamed Hairol Mohd Ali; Zuruzi Abu Samah; Ahmad Syamaizar Ahmad Sabli; Mohd Asri Muhammad; Siti Mazulianawati Majid; Ahmad Shamil Abd Rahman; Judha Purbolaksono

Authors

Yeo Wei Hong Department of Mechanical and Material Engineering, Universiti Tunku Abdul Rahman, Kuala Lumpur53300, Malaysia
Mohamed Hairol Mohd Ali Mechanical EngineeringProgram Area, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri BegawanBE 1410, Brunei Darussalam
Zuruzi Abu Samah Mechanical EngineeringProgram Area, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri BegawanBE 1410, Brunei Darussalam
Ahmad Syamaizar Ahmad Sabli Mechanical EngineeringProgram Area, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri BegawanBE 1410, Brunei Darussalam
Mohd Asri Muhammad Mechanical EngineeringProgram Area, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri BegawanBE 1410, Brunei Darussalam
Siti Mazulianawati Majid Mechanical EngineeringProgram Area, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri BegawanBE 1410, Brunei Darussalam
Ahmad Shamil Abd Rahman Mechanical EngineeringProgram Area, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri BegawanBE 1410, Brunei Darussalam
Judha Purbolaksono Mechanical EngineeringProgram Area, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri BegawanBE 1410, Brunei Darussalam

Keywords:

Austenitic alloy , oxide scale growth , critical failure strain, heat transfer , boiler tubes

Abstract

Exfoliation of oxide scales is known to be associated with the stress and strain developed during the oxide growth. This paper presents a simple procedure to estimate the oxide scale growths and critical failure strains in boiler austenitic tubes over a period of time. In this work, a classical heat flow formula and the relationship between the Larson Miller Parameter (LMP) and the scale thickness were utilized.An approach called Advance Oxide Scale Failure Diagram (A-OSFD) was adopted. The oxide scale failure diagram would provide a general guidance to the power plant engineers to estimate the critical strains.The technique may be used as a supplementary condition monitoring tool for oxide scale growths and to evaluate the critical failure strains.