制氢装置空冷入口阀门垫片断裂原因分析

摘要

In a petrochemical company for the hydrogen production unit air cold inlet pipeline valve leak, after inspection found valve gasket has been damaged by macro and low times observation and material analysis, metallographic examination, electron mi-croscope observation of the gasket failure were a series of testing analysis. The results show that the failure of the gasket is due to the installation process is not uniform, one end of the pressure, the media into the pipeline, it will cause vibration. The vibration frequency and the air inlet velocity are related to the frequency of the gasket itself. With the vibration in the area of the inclusion of vibration in the area of cracking, cracking at the same time, the vibration at the same time also aggravate the cracking, which led to the continued destruction.%某石化公司制氢装置空冷入口管线阀门发生泄漏，经检查发现阀门垫片已经破损，通过宏观及低倍观察，材质分析，金相检验，电镜观察等手段对失效垫片进行了一系列检测分析。结果表明，垫片的失效是由于安装过程中受力不均，一端压紧，介质进入管线后，就会引起振动。其振动频率与进气速度与垫片本身的频率有关。即垫片随着振动在夹杂物区域发生开裂，开裂处的振动同时又加剧开裂，因此导致了持续破坏。