Study on Material Selection for Reheat Cold Section of Ultra Supercritical Primary Reheat Unit
In recent years,in order to alleviate the severe electricity supply-demand imbalance in China,the national policy towards thermal power has become flexible,emphasizing the role of thermal power as a"ballast stone".After the National Development and Reform Commission proposed the"Three 80 million Project",the construction plan of thermal power units has undergone significant adjustments,especially the rapid development of high parameter and large capacity units.The demand for A6911-1/4CrCL22 welded steel pipes has also increased year by year.Influenced by the current international and domestic situation,this material pipeline is experiencing price boost and supply cycle prolonging,which cannot meet the construction needs of domestic ultra supercritical primary reheat unit projects.Therefore,selecting suitable alternative materials is of pivotal significance in promoting the construction of ultra supercritical primary reheat unit projects.This paper explores and verifies the feasibility of substituting domestically produced 12Cr1MoVG seamless steel pipes instead of A6911-1/4CrCL22 welded steel pipes in ultra supercritical primary reheat units through a series of comparisons.
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