Abstract A Safety Research project was carried out in an ammonia plant of OCI Nitrogen, located at the Chemelot site in Geleen, The Netherlands. This research focused on the development of a method to monitor accident processes in the chemical industry mainly caused by mechanical integrity of static equipment like vessels, tanks and heat exchangers. A significant part of the mechanical integrity failure scenarios originates from material degradation and corrosion mechanisms which may develop over a relatively long-time period, possibly taking months, years or even longer. Mechanical failure scenarios from two process units have been worked out and visualized using a bowtie. The research project shows that the monitoring of early warnings can provide information about the current development of mechanical failure scenarios. In addition, early warnings can be used to initiate inspections if there is a likelihood that the mechanical failure scenario has been activated. Considering the shift from breakdown maintenance to preventive and predictive maintenance and risk-based inspection (RBI), inspections based on early warnings could also be a new step in the field of maintenance efficiency.

中文翻译：

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过程装置的机械完整性：基于领结的屏障警报管理

摘要 一项安全研究项目在位于荷兰 Geleen 的 Chemelot 工厂的 OCI Nitrogen 氨工厂中进行。这项研究的重点是开发一种方法来监测化学工业中主要由容器、储罐和热交换器等静态设备的机械完整性引起的事故过程。机械完整性故障场景的很大一部分源于材料退化和腐蚀机制，这些机制可能会在相对较长的时间内发展，可能需要数月、数年甚至更长的时间。来自两个过程单元的机械故障场景已经使用领结设计和可视化。该研究项目表明，预警监测可以提供有关机械故障情景当前发展的信息。此外，如果可能已激活机械故障场景，则可以使用早期警告来启动检查。考虑到从故障维护到预防性和预测性维护和基于风险的检查（RBI）的转变，基于预警的检查也可能是维护效率领域的一个新步骤。