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1 引言胜华炼厂拥有一套7万t/a加工能力的催化装置。今年在该装置的编号为冷201、冷301的水冷器上先后发生小浮头螺栓断裂,使稳定系统不能正常工作,不但造成较大的经济损失,而且影响到全装置的安全生产。为此,我们对螺栓断裂失效原因作了调查分析,认为其断裂原因,一方面是螺栓本身存在质量问题,另一方面是螺栓工作环境存在应力腐蚀倾向,最终导致螺栓应力腐蚀断裂。
1 Introduction Shenghua refinery has a set of 70,000 t / a processing capacity of the catalytic device. This year in the device number cold 201, cold 301 water cooler has a small floating bolt fracture, the stability of the system can not work, not only cause greater economic losses, but also affect the safety of the entire device. For this reason, we made a survey and analysis of the failure reason of the bolt fracture. The reason of the fracture is that the bolt itself has quality problems. On the other hand, there is a stress corrosion tendency in the bolt working environment, which eventually leads to the stress corrosion cracking of the bolt.