海上压力容器腐蚀行为的风险与检验研究

Assessment and Inspection of Corrosion Induced Risk About Offshore Pressure Vessels

基于API 581标准,结合压力容器现场所处环境和对应腐蚀机理,采用定量分析方法对压力容器各类损伤系数、失效概率和失效后果进行分析与计算。同时结合制定的风险可接受准则,对压力容器风险等级进行高低划分,针对风险高的设备及组件,结合其各类损伤系数和失效后果,制定针对性的未来检验周期、检验计划、检验措施和相关后果监控措施。研究结果能实现对压力容器及组件的风险准确定量评估,并针对风险制定相应检验周期和检验计划。此方法对合理分配现场检验人力、财力和控制平台安全生产具有重要意义。且该方法已成功应用于中国海域FPSO,可供其他工程借鉴参考。

Referring to the standard API 581 and considering the field environmental situation as well as the relevant corrosion mechanism of pressure vessels,a quantitative analysis method has been proposed to analyze and calculate the damage coefficient of various type,failure probability and failure consequence for pressure vessels.The risk levels of the pressure vessels may be differentiated as several grades,in accordance with the established risk acceptance criteria.Therewith,a proper plant related with schedule,content and measures of inspection,as well as,the relevant control of risk consequences may be formulated for high-risk vessels and components.The research results can be beneficial to the accurate and quantitative evaluation of the risk degree of pressure vessels,and the confirmation of relevant inspection plant for risks.The proposed method is of great significance to the reasonable allocation of human and financial resources for the on-site inspection and the safe production control of platforms.In conclusion,this method has been successfully applied to FPSO in the China sea and may further be adopted as a reference for other projects.