典型常减压装置塔类设备腐蚀失效案例统计分析

通过对多套典型常减压装置塔类设备的腐蚀失效案例进行归纳总结，统计发生严重腐蚀的塔类设备的腐蚀失效类型、重点腐蚀部位、材质应用类型的数量和比例，得出腐蚀问题发生最多的是碳钢材质的塔类设备，易腐蚀部位一般为塔壁和焊缝，且塔顶腐蚀情况较其他部位严重，此外坑蚀现象是出现最多的腐蚀失效类型。进而结合原油性质和加工特点，分析其对典型的5套常减压装置塔类设备的腐蚀影响，最后对塔类设备典型腐蚀问题进行了腐蚀原因分析，并给出相应的选材和防腐建议。

Statistical analysis of corrosion failure cases in typical atmospheric pressure and vacuum tower equipment

By summarizing cases of corrosion failure in the towers in typical atmospheric pressure relief devices, and by counting the types of corrosion failure, key corrosion-prone parts, and the quantity and proportion of materials employed in types of towers with severe corrosion, it has been concluded that towers containing carbon steel suffer the most corrosion problems, with the main corrosion-prone parts being the tower wall and welds, with the top of the tower suffering more serious corrosion than other parts. Furthermore, pit corrosion was found to be the most common type of corrosion failure. Taking into account the properties of crude oil and processing characteristics, the corrosion effects of crude oil on five typical sets of tower equipment in atmospheric pressure relief devices were analyzed. Finally, the causes of typical corrosion problems in tower equipment were analyzed, and guidelines for selecting materials which will minimize corrosion are proposed.