通过对部分超超临界锅炉因管材错用、焊材错用、焊接工艺不当或选用内螺纹垂直管圈水冷壁时发生的管道泄漏、爆管事故进行分析,阐述了目前我国超超临界锅炉的使用现状和发展方向.重点介绍了P92、P122等新型管材的特点,以及垂直管圈水冷壁与螺旋管圈水冷壁相比的优、缺点,并引用部分现场图片为例进行说明,指出目前超超临界锅炉在使用中出现的主要技术难点在于对于新型管材的特性的正确运用,以及内螺纹垂直管圈水冷壁节流孔圈容易发生结垢堵塞的问题的解决. Through the analysis of some supercritical boilers due to pipe misuse, misuse of welding consumables, improper welding process or pipe leaks and squib accidents which occur when vertical spiral pipe water wall is selected, the author expounds the current supercritical boiler The status quo and development direction of the P92 and P122 pipelines are introduced.The advantages and disadvantages of the P92, P122 and other new types of pipe materials as well as the advantages and disadvantages of the vertical pipe ring water wall and the spiral pipe ring water wall are introduced, and some site pictures are taken as an example for illustration, The main technical difficulties that arise in the use of supercritical boilers lie in the correct use of the characteristics of the new pipe and the solution to the problems of scale fouling and blockage in the orifice ring of the vertical pipe wall of the internal thread.