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对PX装置运用基于风险的检验技术,识别装置内的高度危害介质及其危害种类,工艺危害性分析及损伤机理分析表明主要的损伤机理是高温氢损伤、回火脆化和外部腐蚀。定量风险分析结果显示,该PX装置中135台压力容器中高风险设备项6个,占3.09%;中风险153项,占78.87%;低风险35项,占18.4%。根据设备风险制定推荐性检验策略,为装置的风险识别和降低风险提供参考。
The use of risk-based inspection techniques on PX devices identifies the highly hazardous media and their types of hazards within the device, and analyzes the process hazard and damage mechanisms. The main damage mechanisms are high temperature hydrogen damage, temper embrittlement and external corrosion. Quantitative risk analysis showed that 6 of the 135 pressure vessels in the PX plant were high-risk equipment, accounting for 3.09%, 153 medium risks, accounting for 78.87%, and 35 low-risk items accounting for 18.4%. According to the risk of equipment to develop a recommended inspection strategy for the installation of risk identification and risk reduction provide a reference.