摘要
文章以方家山核电工程2#机组1U4、1U6主管道焊口在焊接过程中出现的疑似层间未熔合缺陷为例,分析了核电工程主管道窄间隙自动焊的焊接特点,提出了如何避免出现焊接缺陷的措施;分析了核电主管道厚壁铸造奥氏体不锈钢的RT特点,采用焊缝中心透照及偏移焊缝中心两次透照的方法,可以有效避免漏检缺陷,同时,采取UT工艺是检验焊接质量和缺陷定位的良好实践,可以广泛应用于厚壁管的焊接检验。
Taking the 2# unit 1U4, 1U6 main pipe welding joint with suspected interlayer incomplete fusion defects in FangjiaShan nuclear power project as an example, this paper analyzes the narrow-gap automatic welding characteristics of main pipe, puts forward measures to avoid weld defects. The paper also analyzes the RT characteristics of nuclear power main pipe with thick casting austenitic stainless steel. Using the method of weld center transillumination and migration of weld center twice transillumination, can effectively avoid undetected defects. Also, the UT process is a good practice of welding quality inspection and flaw location, and could be widely applied on the welding test of thick walled tube.
出处
《中国特种设备安全》
2015年第6期47-53,共7页
China Special Equipment Safety
关键词
核电工程
主管道
窄间隙自动焊
RT疑似缺陷
Nuclear power project
Main pipeline
Narrow gap automatic welding
The RT suspected defects
