By analyzing and diagnosing the process of internal high temperature overheating fault in 110 kV main transformer, expounds the chromatogram analysis method of transformer oil, through disassembling test and repair in locale, verifies the correctness of diagnosis.

Cause analysis and solution for boiler high-temperature superheater tube bursting during 600MW supercritical unit startup commissioning;

Through comprehensive stress calculation of outlet header of high-temperature superheater,the stress defects during operation are found out,and shortages in boiler design are pointed out,at the same time,and the ultimate causes of crack between header and snake tubes are found.

By the physico-chemical testing and analysis on the rupture and leakage failure of high-temperature superheater pipe of No.

Serious coking and ash depositions,that occurred in the high temperature superheater zone of a certain 220 t/h high pressure boiler,are being analyzed,showing that the main causes are: low melting point of the coal ash,too low a feed water temperature as well as soot-blower service defaults.

With the aid of scanning electron microscope(SEM) and X-ray diffractometer(XRD),an analysis is performed on scales formed on inner walls of G102 steel high temperature superheater tubes.

The reason of DG410/100-2 boiler high temperature superheater tube rupture are analyzed,the contradiction between keeping nomal main steam temperature and high temperature heat surface overheating,which is created after a nomal boiler changed into a peak shaving boiler are expounded.

The failed superheater tube of a supercritical boiler in a power plant was studied by means of macrofractographic and metallographic examination,chemical composition analysis and mechanical property testing.