Abstract
Pipe failure accidents (bulging, bursting) are frequent in thermal power plants, and severely influence the safe and economic running. The authors analyzed the possible causes and features of low-temperature superheater pipe bulging. Taking the low-temperature superheater pipe bulging accident in a power plant for an example, the authors conducted macroscopic topography analysis, running environment analysis, metallurgical analysis, chemical composition analysis and strength analysis of the bulged pipe. Paper’conclusion was that the cause of low-temperature superheater pipe bulging wasn’t superheating, and the cause of bulging was flame straightening of the pipe during installation. The paper's innovation is material and dynamics analysis of the accident cause.
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