过热器管不同运行时态爆管分析与测试

The Failure Analysis and Testing of Different Services for Steam Hot Pipe by SEM

过热器管在运行过程中要十分注意控制运行温度,若温度偏高,则会造成短期超温爆管和长期过热爆管,前者断裂过程类似于高温拉伸快速断裂,后者类似于蠕变断裂,故在实际生产中,必须严格控制其使用温度,以避免爆管事故的发生。

Failure analysis and life assessment of steam hot (HP) pipe require precise know ledge of the real operating time and temperature. The main reasons of deformation and cracking of HP pipe are super-temperature in short time and over-heat in long time.