对超（超）临界机组用四大管道的国产化现状和质量情况进行了简要概述，并对四大管道国产化的经济效益进行了分析。国内已有多家企业具备了四大管道的生产能力，国产四大管道已能满足相关标准要求，并已在国内多家电厂投入使用。

In this paper, the status of localization situation and quality for four major pipes in ultra-supercritical units were briefly discussed, and the economic benefit of localization for four major pipes also was studied. The result shows that there are many domestic manufacturers having the ability to produce four major pipes, which have met the related standards and put into use in several power plants.