Effect of High Temperature on Rear Pass Boiler Tubes in Coal-Fired Power Plant

This work presents the investigations on three sample boiler tubes in the rear pass area (low temperature reheater 1 (LTR1)(A210-A1), intermediate temperature superheater (ITS)(A210-C) and economizer tubes) ) (A210-C) of a coal-fired power plant in Malaysia, which had been replaced during major overhaul in January 2014 after running for about 11 years. Visual inspections, chemical analysis on deposits, metallurgical examinations and creep analysis on the tubes were carried out. Findings from the investigation were used to determine the tubes condition metallurgically before the removal. The results show that the relatively high temperature at the area pass area did not affect the metallurgical property of the tubes.