常压储罐底板腐蚀的多源数据评价

Evaluation of Multi-source Data on Bottom Plate Corrosion of Atmospheric Storage Tank

为提高储罐检验效率和腐蚀评价准确性,通过某油田公司管辖储罐的损伤模式识别、在线声发射检测和开罐检验进行验证与评价,结果表明:罐体结构不合理易导致隔热层下腐蚀和土壤腐蚀,罐内部易发生微生物腐蚀和酸性(含硫)污水腐蚀;声发射检测可获取底板腐蚀状态和可能发生腐蚀的区域;空间数据扫描可间接获取因局部变形导致的腐蚀环境分布情况。因此,先通过声发射检测和空间数据扫描预判腐蚀损伤区域,可提高开罐检验效率和准确性。

To improve the efficiency of the inspection and the accuracy of corrosion evaluation for storage tanks,the damage pattern recognition,acoustic emission inspection and off-line inspection of a storage tank administered by an oil field company were verified and evaluated.The results showed that unreasonable structure easily led to corrosion under insulation and soil corrosion,and microbial corrosion and acid(sulfur-containing)sewage corrosion easily occurred inside the tank.Acoustic emission inspection can obtain the corrosion status of the bottom plate and the area where corrosion may occur.Spatial data scanning can indirectly obtain the environmental distribution of corrosion caused by local deformation.Therefore,acoustic emission detection and spatial data scanning can improve the efficiency and accuracy of off-line inspection.