承压设备脉冲涡流检测技术研究及应用  

Research and Application of Pulsed Eddy Current Testing Technology for Pressure Equipment

作　　者：沈功田[1] 李建[1,2] 武新军[3] SHEN Gongtian LI Jian WU Xinjun(China Special Equipment Inspection and Research Institute, Beijing 100029 Department of Mechanical Engineering, Tsinghua University, Beijing 100084 School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074)

机构地区：[1]中国特种设备检测研究院,北京100029 [2]清华大学机械工程系,北京100084 [3]华中科技大学机械科学与工程学院,武汉430074

出　　处：《机械工程学报》2017年第4期49-58,共10页Journal of Mechanical Engineering

基　　金：国家"万人计划"特殊支持经费;国家"十二五"科技支撑计划课题(2011BAK06B03);国家"十一五"科技支撑计划课题(2006BAK02B02)资助项目

摘　　要：承压设备是千万吨炼油、百万吨乙烯和超(超)临界电站锅炉等大型成套装置的核心设备,利用脉冲涡流(Pulsed eddy current,PEC)检测技术可对其因腐蚀引起的均匀壁厚减薄进行快速不停机检测,对保障大型成套装置长周期安全运行具有重要意义。介绍承压设备PEC检测技术的研究背景,指出PEC检测技术在承压设备不停机检测方面的优势;在PEC检测原理、钢的PEC信号特征及变化规律等研究基础上,介绍为实现和优化检测功能而进行的钢的PEC检测理论研究工作;通过研究现场检测中各因素的影响机理,指出PEC检测技术的特点与适用条件;介绍基于上述研究成果和结合实际检测需求先后研制的首个国家、能源行业和国际标准,以及开发的PEC检测仪器;通过两个典型的现场检测应用,说明PEC检测技术在承压设备壁厚减薄检测应用中的实用性和可靠性。Pressure equipment, as the key equipment of the large complete equipments such as ten million tons refinery, one million tons of ethylene and supercritical（ultra-supercritical）power plant boiler, its uniform wall thinning which caused by corrosion could be on-line assessed by pulsed eddy current（PEC） testing technology. It has important significance to ensure the long cycle operation of the large complete equipments. The background of studying the PEC testing technology for pressure equipment is introduced, and the advantage of on-line assessment by the technology is pointed out. After the PEC testing principle and the PEC signal characteristics of steel have been researched, the works on PEC testing theory for realizing and optimizing the testing function are introduced. The characteristics and applicable conditions of PEC testing are proposed when the influence mechanism of the factors met in the field is investigated. The first national, energy and international standards, which are continually established based on the above researches and considering the actual requirements, as well as the self-developed instrument, are introduced. Two typical field applications are presented, to illustrate the practicability and reliability of PEC testing technology in assessing the wall thinning of pressure equipment.

关 键 词：承压设备 脉冲涡流检测 覆盖层 不停机 

分 类 号：TH49[机械工程—机械制造及自动化]