Fitness-for-Service Determination for Grade 91 Power Plant Components Subject to Creep

This webinar provides an introduction to Fitness-for-Service (FFS) of power plant components. Additionally, we will review a Level 3 Fitness-for-Service case history of a girth weld in a Grade 91 Hot Reheat Steam Piping System containing defects identified through routine inspection.

The following aspects of a fitness-for-service study will be reviewed:

  • The use of API-579/ASME FFS-1 and need for supplementary data
  • The development and overall structure of the ASME FFS-1 document
  • The general fitness-for-service assessment procedure
  • Overview of flaw and damage assessment procedures
  • Defect categorization
  • Crack-like flaw rules relevant to the case history including the Failure Analysis Diagram and Leak-before-Break concepts

This case history will include review of inspection data, characterization of damage, and the Level 3 engineering assessment that served as a basis for continued operation without immediate repairs of the weld defects. The need for supplementary data not included in ASME FFS-1, such as heat affected zone creep rupture, will be highlighted to illustrate some of the typical challenges with this type of analysis.

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The Host:

Robert Brown, P.E.
Associate Mechanical Engineer

Mr. Brown has a career spanning over 25 years of experience as both a consultant and an owner-user, providing engineering support to petrochemical, process and power plants worldwide. He is an industry expert in the development and practical use of advanced finite element analysis techniques to evaluate mechanical integrity and to optimize the life cycle of in-service pressure containing equipment.

Mr. Brown was integral in the development of the major revision to the ASME Boiler and Pressure Vessel Code, Section VIII, Division 2 (2007), specifically, the “design by analysis” section of the new Code. He was also a contributor in the development of the American Petroleum Institute landmark Fitness-for-Service standard API-579. He is an expert in the application of API-579 Level 3 Fitness-for-Service methods to assess integrity due to various damage mechanisms, including high temperature creep and fatigue.

He has been an instructor for API-579 courses as well as ASME courses on fatigue analysis per the new ASME Section VIII, Division 2 Code. He is a contributing member of the API 579-1/ASME FFS-1 (Fitness-for-Service) committee and also serves on the ASME Section VIII Working Group on Design by Analysis.

Event Details

Event Date 16 Nov 2017 11:00 am