In the two 1 000 MW ultra-supercritical units of a certain power plant project phase I,the P92 steel ID 349 mm×72 mm main steam pipe was adopted.The operation safety and life of this thin walled pipe attracted a lot of attention.With the help of full-load spectrogram of actual pipe damage obtained from the constructed condition monitoring and life safety management system,aiming at the laws of two material creep damage conventional long-time strength and lower boundary long-time strength,considering two wall thickness thin wall and thick wall,the operation safety and expected service life of P92 steel main steam pipe under the conditions of several combinations were analyzed and researched.

The condition monitoring life safety management system(CMLMS)of high temperature and high pressure compents in 1 000 MW ultra-supercritical units of Huaneng Yuhuan power plant unit 1 and unit 2 was built. Based on entire action load spectrum from CMLMS, considering thin-wall thickness and normal thickness,and the law of normal rupture strength and lower limit rupture strength, P92 steel main steam pipeline operation life and expected life were analyzed under several conditions. The result shows that P92 steel thin-walled main steam pipeline has about 120 kh of operation life under load spectrum condition. The entire action load spectrum provides an effective means for determining the practical operation load of high temperature and high pressure compents.

介绍了华能玉环电厂一期1号、2号机组的高温高压管道部件状态监测寿命安全管理系统(CMLMS)的运行流程和功能以及应用结果.CMLMS的构建和应用表明,可根据CMLMS对高温高压部件的运行监督、寿命管理和安全性方面作出评定,对高温高压管道部件进行全作用载荷谱和寿命损耗等监测管理,对大机组的安全、经济运行有重要意义.

The structure and functions of the maintenance management system for pipelines and their supports & hangers developed by Xi'an Thermal Power Research Institute Co Ltd have been presented.Results of practical application show that the said system reaches purpose of grasping the situation,understanding the trends,and discovering problems appeared on pipelines and their supports & hangers,enhancing the management efficiency,providing guarantee for long-term safe and economic operation of the pipeline system.