This essay discusses the ways and the steps to prevent the reheated steam pipe crossing from ellipsization of in the 660MW coal unit and also the counteropening fixing method.

• 介绍了660MW燃煤机组再热蒸汽管道热段管道管口椭圆处理方法及处理步骤以及对口安装方法。通过处理能使管道对口焊接达到相关规范要求,且不影响管道的正常使用寿命。