5-M908 boiler s front wall embracing superheater,the cause of the incident is being discussed and measures of improvement rendered,according to the fracture surface s metallographic structure and spectrum ingredient analyses,as well as scanning electronic microscope observations.

The leakage and defects of heating surfaces of the water wall,double-tube superheater,economizer,and low temperature reheater of the four 1 025 t/h boilers of a power plant are analyzed comprehensively.