Main committee of Power Generation Facility Code (MCPGFC) of Japan Society of Mechanical Engineers (JSME) established rules to manage pipe wall thinning on 2005–2006, and they also made a roadmap in 2007 to enhance pipe wall thinning management rules. Research Committee on Application of New Findings and Technology to Improve Pipe-Wall-Thinning Management, which was conducted from April 2010 to March 2012 summarized the new draft technical knowledge of the major phenomena of pipe wall thinning, that is, flow accelerated corrosion and liquid droplet impingement erosion as well as new inspection method. In this report, the new technical knowledge is described. The achievement situation of the road map made in 2007 was evaluated, and the studies required in future were considered.

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