This paper addresses the engineering evaluation of F-Class hot section components from an owner/operator perspective, with the practical objective of extending their interval of useful service beyond the limits recommended by the OEM. Starting with the first stage, the initial aim is to extend operation from two to three intervals. A multi-disciplinary approach to hot section life management is described, which is used to assess the component condition and possible risks involved with extending the active service life. The assessment draws from many sources: design analysis (durability, weak points, material and coating limitations), inspection (when, where, limits and tolerances), service (base load, cycling, turbine inlet temperature and hours) and repair techniques (welding, brazing, heat treatments). Results of the modeling, damage tracking, NDT and metallurgical and mechanical testing are summarized.

This content is only available via PDF.
You do not currently have access to this content.