| 流量计导压管断裂失效分析 |
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| 引用本文： | 王立坤,周杨,荣军,何新民,王建伟,邢普瑜.流量计导压管断裂失效分析[J].材料保护,2017,50(9). |
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| 作者姓名： | 王立坤 周杨 荣军 何新民 王建伟 邢普瑜 |
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| 作者单位： | 1. 中国石油独山子石化分公司压力容器检验所,新疆克拉玛依,833699;2. 中国石油独山子石化分公司机动,新疆克拉玛依,833699;3. 中石油西部管道公司工程项目管理部,新疆乌鲁木齐,830000;4. 中国石油独山子石化分公司储运联合车间,新疆克拉玛依,833699 |
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| 摘 要： | 某化工厂工艺管线上的316不锈钢材质的孔板流量计导压管断裂,导致介质泄漏发生火灾。为查明其失效原因,对断裂的仪表管进行成分、硬度、金相、断口形貌和腐蚀产物分析,确认仪表管发生断裂的原因是在安装应力、震动和环境中Cl元素的共同作用下,先发生了应力腐蚀形成裂纹源,裂纹达到门槛值后又以疲劳形式扩展,最终导致开裂。
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| 关 键 词： | 应力腐蚀 疲劳 震动 316不锈钢 |
Fracture Failure Analysis of Flowmeter Guide Tube |
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| WANG Li-kun,ZHOU Yang,RONG Jun,HE Xin-min,WANG Jian-wei,XING Pu-yu.Fracture Failure Analysis of Flowmeter Guide Tube[J].Journal of Materials Protection,2017,50(9). |
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| Authors: | WANG Li-kun ZHOU Yang RONG Jun HE Xin-min WANG Jian-wei XING Pu-yu |
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| Abstract: | The tubing fracture of an orifice plate flow meter in a process pipeline of a chemical plant led to the fire due to the medium leakage.In order to find out the causes of fracture failure,the component analysis,hardness test,metallographic examination,fracture morphology and corrosion product analysis were performed.Results showed that the reason of the rupture of instrument tube was as follows:under the combined action of installation stress,vibration and chloride ions in the environment,stress corrosion cracking occurred at first and then the cracks were extended by fatigue form after reaching the crack growth threshold value,which finally resulted into cracking. |
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| Keywords: | stress corrosion fatigue vibration 316 stainless steel |
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