Incorporation of an adequate maintenance program related to the ageing of industrial facilities occurring in offshore oil platforms is vital to reduce costs and avoid catastrophic failures. In the present work, a set of components (i. e. pipes, plates, and elbows) were removed from offshore oil platforms from different processes with 20 years of uninterrupted operation. The component's characterization consisted of chemical composition, microstructure, and mechanical properties. A collection of results was made to evidence several indicators to keep track of crucial deviations of processing components. These indicators should be taken into account when actions must be taken to guarantee the mechanical integrity of the studied components. From 68 studied samples, 16 samples did not fulfill their chemical composition, 37 samples showed a banded microstructure, 36 samples did not fulfill their mechanical properties, and all of them showed the presence of non – metallic inclusions associated with a pitting corrosion mechanism. These results compilation allow for modification of the remaining useful life equation, $R_{\mathit{UL}}$, (used to calculate the remaining useful life of a variety of asset types). Thus, the outcome of the modified equation indicates where and when it is necessary to remove components before its catastrophic failure.

结合与海上石油平台中发生的工业设施老化相关的适当维护计划对于降低成本和避免灾难性故障至关重要。在目前的工作中，一套组件（即管道、板和弯头）从海上石油平台上从不同的过程中移除，并具有 20 年的不间断运行。部件的表征包括化学成分、微观结构和机械性能。收集了一系列结果来证明几个指标，以跟踪处理组件的关键偏差。当必须采取措施以保证所研究组件的机械完整性时，应考虑这些指标。从 68 个研究样品中，16 个样品不符合其化学成分，37 个样品显示带状微观结构，36 个样品不符合其机械性能，并且所有样品都显示存在与点腐蚀机制相关的非金属夹杂物。这些结果汇编允许修改剩余使用寿命方程，${\mathrm{电阻}}_{\mathit{UL}}$,（用于计算各种资产类型的剩余使用寿命）。因此，修改后的方程的结果表明在其发生灾难性故障之前需要在何时何地移除组件。