介绍宁海二期百万千瓦超超临界机组锅炉侧过热器及再热器管道的焊接。HR3C材质的焊接是首次接触的新钢种焊接。以本工程焊接HR3C为实例,通过解决实践中遇到的各类问题、完善焊接工艺方法,以及在施焊全过程进行严格的监督控制,获得了良好的焊接质量。 Describe the welding of overheater and reheater pipes in the second phase of Ninghai two million kilowatts ultra-supercritical unit. HR3C material welding is the first contact with the new steel welding. Taking this project welding HR3C as an example, by solving various problems encountered in practice, improving the welding process, as well as the strict supervision and control in the whole process of welding, get a good welding quality.