A review is presented of 17 years experience in the application of a technology to increase the reliability of superheaters and reheaters without replacement. More than 20 superheaters and reheaters have been modified and have accumulated more than one million hours since they were modified. The technology, called TubeMod, optimizes the temperature profiles by redistributing steam flow from cold tubes to hot tubes to reduce peak temperatures to enhance life and avoid future failures. Removal of high temperature restrictions and application on a T91 superheater are also discussed.

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