The burst-leakage of "four tube kinds" in utility boilers are main causes leading to non-planned boiler shutdown in power plants,while the main causes resulting in burst-leakage of "four tube kinds" in boilers are:overtemperature excess heating,corrosion,worn-out,and thermal fatigue etc.

The leakage of boiler heating surface accident seriously disserves the normal operation of plant,results in great economic losses.

In the paper,the frequency of boiler tube leakage is counted up in Zhangjiakou Power Plant since the first units gone into operation,the reason of the faults are analyzed,the countermeasures to prevent tubes leakage are introduced,and the esperience in these work is affirmed to make use for reference.

The causes of explosion are fatigue failure due to resonant vibration.

The reasons of boiler tubes explosion were analyzed.

The analysis and precaution of boiler four pipes burst and leakage;

Directing against the problems of water-wall tube burst and leakage in seal-water tank for a 2100 t/h boiler in one thermal power plant, the cause analysis has been carried out through several means, such as macroscopic examination, chemical composition analysis, mechanical performance analysis, and metallurgical structure analysis etc.

The causes of bursting leakage of "four tubes" in boiler are analyzed.

Based on the explosive leakage conditions of power plant boiler "four tubes" in central china electric power corporation,we make a summarization,analyze the cause,and bring forward the measures and advices of avoiding it happening.