AIM Engineers Service Team will present at the ASME 2017 PVP Conference

Members of Intertek AIM’s Engineering Services team will present technical papers at this year’s ASME 2017 Pressure Vessels & Piping (PVP) Conference at the Hilton Waikoloa Village in Waikoloa, Hawaii on July 16-20, 2017.  For those attending the ASME 2017 PVP Conference it will be the outstanding international technical forum. Participants can expect to expand their knowledge by means of being exposed to an array of diverse topics, and exchange views and thoughts both from industry and academia in a variety of topics related to Pressure Vessel and Piping technologies for the Power and Process Industries.  ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD) will be participating in this year’s conference and held in collaboration with the ASME 2017 PVP on Thursday and Friday July 20-21, 2017, will be the EPRI Workshop, “Dissimilar Weld in High Temperature Applications”.

Members of our Intertek AIM Engineers Service Team will present at the ASME 2017 PVP Conference:

  • PVP2017-66255 – Dealloying of as-Welded Microstructures in Aluminum Bronzes in Essential Cooling Water Services,
    Authors:  Rita Kirchhofer, Michael Garner, Henry Vaillancourt and Russell C. Cipolla

    Wednesday, July 19, 2017
    Rm:  Kona 2
    2:00 – 3:45 PM

Ms. Rita Kirchhofer will present this technical paper for the PVP Conference and the EPRI Workshop “Dissimilar Welds in High Temperature Applications” held in collaboration with the PVP Conference on July 20-21, 2017.  The paper being presented at the ERRI Workshop: Special Considerations for Dissimilar Metal Welds: Design, Fabrication, and Repair for Power Plants In Flexible Operation.

When presenting technical paper PVP2017-66255, Ms. Kirchhofer will discuss the potential environmentally-induced degradation mechanism in piping systems and components exposed to marine, brackish, or raw water services and the reduction in mechanical strength and fracture toughness properties due to the dealloying of aluminum-bronze (Al-Brz).,  Included are details of  the metallurgical evaluation completed to establish a fundamental understanding of the resistance of the pipe welds to dealloying, the factors affecting the dealloying susceptibility and the finding of these comparative evaluations to determine the use of aluminum bronze piping welds for both above ground and below ground(buried) piping system.

  • PVP2017-66254 – Mechanical Properties of Dealloyed Aluminum Bronze Large-Bore Casting in Essential Cooling Water Services
    Authors:  Russell C. Cipolla, Michael Garner and Arden J. Aldridge

    Thursday, July 20, 2017
    Rm:  Kona 2
    8:30 -10:15 AM

Russell Cipolla is a member of this year’s PVP 2017 Program Organizer Contacts as a PVP Technical Committee Chair for Codes and Standards and will present this technical paper during the “Materials and Fabrication” session.

In certain Aluminum-bronze (Al-Brz) alloys there is an environmentally-induced degradation mechanism in piping systems containing cast components exposed to marine, brackish, or raw water service.  Mr. Cipolla’s delivery of Technical Paper PVP2017-66234 will provide the observations, results and conclusion drawn from the past and present mechanical testing of the effect of dealloying on the mechanical properties of Al-Brz casting components that have been investigated for tensile strength and fracture toughness.

  • PVP2017-65834 – Fitness -for-Service Creep Life Evaluation of a Hot Reheat Piping System at 400,000 Operation Hours and PVP2017-65815 – Enhanced Creep Life Evaluations for Grade 91 Circumferential Weldments
    Author of both technical papers listed above:  Marvin J. Cohn, P.E., P. Eng., FASME

    Thursday, July 20, 2017
    Rm:  King’s 1
    2:00 – 3:45 PM

In this year’s ASME PVP -2017 Conference Marvin Cohn is Chairing the first and third Fitness-for Service sessions provided by the Materials and Fabrication Technical Committee, and he is serving as a Vice-Chair and presenting the technical papers PVP2017-65815 and PVP2017-65834 during the second Fitness for Service session.

Catastrophic hot reheat (HRH) pipe failures in the 1980’s has the electric utility industry focusing on fitness-for-service (FFS) evaluations of the main steam and HRH piping systems. Mr. Cohn will discuss the significant differences between the as-designed and simulation as-found piping stress analyses, and how the creep life uncertainties can be grouped into high, medium, and low priorities while the weldment examination intervals correspond to scheduled outages.  The example used in this discussion is of an FFS program applied to girth welds of an HRH piping system that has been operating more than 400,000 hours.

Mr. Cohn second technical paper PV2017-65815, will confer, as known in our industry, that stresses are the most important weld-to-weld creep rupture life variable in a single piping system.  For this purpose, it is necessary to have an accurate evaluation of piping stresses to properly rank circumferential weld remaining creep rupture lives.  Mr. Cohn will clarify how over the last 15 years the methodology developed here has been successfully used to select the lead-fleet creep damage in Grade 91 circumferential weldments.  His discussion will provide the five-step program for asset integrity management of circumferential welds in piping system subject to creep damage.

At the EPRI Workshop “Dissimilar Welds in High Temperature Applications”, Intertek will present the following paper:

  • Special Considerations for Dissimilar Metal Welds: Design, Fabrication, and Repair for Power Plants in Flexible Operation
    Authors: Rita Kirchhofer, PHD, PE, CWI1, Gran Lanthorn, EP, CLS, Henry Vaillancourt, and Clayton Q. Lee, PE

Ms. Rita Kirchhofer will present this paper for the EPRI Workshop and will present the technical paper PVP2017-66255 – Dealloying of as-Welded Microstructures in Aluminum Bronzes in Essential Cooling Water Services for the ASME 2017 PVP Conference.

Dissimilar metal welds (DMWs), susceptible to failure modes that previously were only observed after long term operation, are accelerated by new operating conditions. Root cause analysis of existing DMW failures are needed to assess the probability of failure in new flexible operating conditions.  Ms. Kirchhofer will discuss, based on observation of DMW failures in the field, factors such as joint geometry, residual stress, post-weld heat treatment, weld filler metal, welding techniques, to name a few.  Summarized will be the functional design, fabrication and potentially repair considerations for optimum performance under flexible operation.  The goal of this presentation is to provide optimized guidelines for design, fabrication, and repair of DMWs to reduce risk of in-service cracking.

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