HRSG Inspection Planning Guide

This Inspection Planning Guide provides general guidance for planning inspections of HRSG components, where this is taken to mean all significant piping and structures within the HRSG OEM supply boundary including accessories such as duct burners and emissions control equipment. Valves and process instrumentation are not included.
The objective is to give the inspector the means to effectively anticipate and identify problem areas, recognize active damage mechanisms and respond to changes in modes of plant operation. This is particularly important for HRSGs that are being cycled if they were designed for baseload operation. Additional detailed information on HRSG tube failure mechanisms can be found in the companion volume to this guide - the HRSG Tube Failure Diagnostic Guide.

This 2nd edition is updated with additional valuable information from the hundreds of field inspections performed by Tetra Engineering staff of horizontal and vertical gas path HRSGs since the last edition was released. There is expanded coverage on inspecting drums and deaerators, more material on failure modes and mechanisms, and additional appendices. More consideration is given to inspections of vertical gas path units and there are further case studies from field inspections.