by Phillip E. Prueter, P.E. / Jun 01, 2016

In May, 2016 Phillip Prueter and David Dewees presented A Summary of the Computational Methodologies and Validation Techniques Employed to Develop Updated Weld Residual Stress Guidance in API 579-1/ASME FFS-1 Fitness-For-Service at the ASME Verification & Validation Symposium in Las Vegas, Nevada. Below is an introduction to their presentation:

  • Recent progress in the simulation of weld residual stress (WRS) and in its verification and validation (V&V) has provided the opportunity to re-examine existing WRS guidance.
  • This work represents a part of the Materials Properties Council (MPC) FFS Joint Industry Program (JIP) to re-evaluate the existing welding residual stress (WRS) guidance in the current API 579-1/ASME FFS-1 (API 579) Annex E.
  • Key point of this presentation is to thoroughly document methods and models so that:
    • Detailed recommended WRS simulation procedures can be developed and incorporated into the upcoming release of API 579 (Annex 9.D), expected later this year
      • The goal is for consistent results to be obtained and to gain confidence in methodologies
    • Understanding and acceptance from the domestic and international technical community can be achieved