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/ Plant Pipe Life Evaluation Method Based On Operation History Including Creep and Fatigue
/ Plant Pipe Life Evaluation Method Based On Operation History Including Creep and Fatigue
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机译：基于包括蠕变和疲劳在内的运行历史的管道/工厂管道寿命评估方法
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摘要
The plant will start and stop repeatedly as the country's electricity usage changes. Piping material fatigues when the plant starts and stops. When this pipe material is fatigued, the allowable stress in the pipe is reduced. In addition, the power generation equipment is operated at a high temperature. If it is operated for a long time at this high temperature, the piping material is affected by creep and the piping is stretched. In addition, in the power plant used for a long time, the thickness of the pipe decreases due to the erosion inside the pipe, while the thickness of the pipe increases due to the corrosion. In addition, the weight per unit length of the pipe changes according to the change in the moisture content of the heat insulating material, and in order to improve cycle efficiency or solve vibration problems during long-term use, equipment such as valves may be changed. Therefore, power generation piping is different from the time of construction as the following items have passed the operation period. For example, after 5 years of operation in a pipe that was sending 5 kg / cm 2 of steam at the time of construction, 15 kg / cm 2 of steam would be flowed at the time of construction. The following items are not artificially or undesirably, such as thick scales in the pipe, but the condition is different from the beginning of operation after the period of use as a result of operation, changing the integrity of the piping material. . Therefore, the present invention analyzes the effect of the change of the support load of the pipe support device and the distance movement of the piping system on the reliability of the facility according to the long-term use of the high temperature and high pressure piping, thereby maximizing the life of the facility, that is, the pipe reliability to maximize the reliability of the facility. We developed a method to adjust the load and distance travel of the support system.
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机译：随着国家用电量的变化，该电厂将反复启动和停止。工厂启动和停止时管道材料会疲劳。当该管道材料疲劳时，管道中的允许应力会降低。另外，发电设备在高温下操作。如果在此高温下长时间运行，则管道材料会受到蠕变的影响，并且管道会被拉伸。另外，在长时间使用的发电厂中，由于管内部的腐蚀，管的厚度减小，而由于腐蚀，管的厚度增加。另外，管的每单位长度的重量根据绝热材料的水分含量的变化而变化，并且为了提高循环效率或解决长期使用期间的振动问题，可以改变诸如阀的设备。 。因此，由于以下项目已超过运行期，因此发电管道与施工时间有所不同。例如，在建造时输送5 kg / cm 2的蒸汽的管道中运行5年后，将产生15 kg / cm 2的蒸汽。施工时就流了。下列项目不是人为或不理想的，例如管道中的水垢，但由于操作而导致的使用条件与使用期结束后的开始操作有所不同，从而改变了管道材料的完整性。 。因此，根据高温高压管道的长期使用，本发明分析了管道支承装置的支承载荷的变化和管道系统的距离运动对设备可靠性的影响，从而使设施的寿命最大化，即，使管道的可靠性最大化以使设施的可靠性最大化。我们开发了一种方法来调整支撑系统的负载和距离。
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