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过热器联箱的引入、引出方式，管组的结构、阻力系数以及热负荷的差异所引起的热偏差是导致爆管的重要因素，同时管组材质的选择对其使用寿命也具有决定性的影响。华能阳逻电厂４ 号锅炉高温过热器爆管的原因，正是由于蒸汽引入方式不当，由于“三通效应”的影响造成短时超温，某些部位选材不当，造成在１６８ ｈ 试运期间两次爆管。为了对过热器壁温状况以及蒸汽流量分配进行较全面的了解，对过热器使用的管材寿命进行估算，编制了过热器壁温计算程序，以对过热器壁温进行监测。结果表明，程序计算结果能较好地反映“三通效应”对过热器蒸汽流量及管壁温度的影响，对过热器的改造和设计具有一定的参考价值。
The thermal deviation caused by the introduction of the superheater header, the way of outlet, the structure of the tube group, the resistance coefficient and the difference of heat load are the important factors leading to the tube explosion, and the material selection of the tube group also has a decisive influence on the service life. . The reason for the high temperature superheater tube explosion at Huaneng No.4 Boiler in Huaneng Yangluo Power Plant is precisely due to the improper steam introduction method. Due to the short-term over-temperature caused by the “tee effect”, improper materials are selected in some parts, Two burst tube. In order to have a comprehensive understanding of the superheater wall temperature and the distribution of steam flow, the life of the pipe used by the superheater was estimated, and the superheater wall temperature calculation program was compiled to monitor the superheater wall temperature. The results show that the calculation results of the program can better reflect the influence of the “tee effect” on the superheater steam flow rate and the tube wall temperature, and have certain reference value for the superheater reconstruction and design.