摘要
Abstract
Main pipeline plays an important role in nuclear power plant safety, and main pipeline welding quality also is very important. In main pipeline welding of the current nuclear power units, narrow gap automatic welding gradually replaced the traditional manual welding, which improved the welding efficiency. But it used single-layer single-channel welding process in main pipeline narrow gap automatic welding, if the control is not good, some defects easily appear such as incomplete fusion, affect the weld quality, must be repaired. Taking repair process of Fangjiashan nuclear power project 2 # unit main pipeline as example, it introduced a kind of main pipeline manual repair process which successfully used in engineering practice, and summarized welding defects type of main pipeline, causes and repair methods.关键词
核电机组/主管道焊缝/焊接缺陷/返修Key words
nuclear power unit/main pipeline weld/welding defects/repair分类
矿业与冶金
