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Premature Failures of Formed Tees in High Energy Piping Systems

Recently, there have been several premature pressure part failures in both conventional and combined-cycle power plants involving formed tees of various sizes that have been designed and manufactured in accordance with the requirements of ASME B16.9. This webinar explains the possible causes of these failures and offers the outline of a structured program to identify tees that are at risk.




Date: January 24, 2024
Time: 12 PM EST (9 AM PST / 6:00 PM CET)
Duration: 1 hour
Presented by:

Overview

As a result of significant changes in the market, particularly after de-regulation of the U.S. electric power industry, it has become increasingly obvious that in some key areas of the supply chain the oversight function once provided by the legacy OEMs has been substantially compromised, so that in important ways relative to suppliers, “no one is minding the store.”

Recently, there have been a number of pressure part failures in both conventional and combined-cycle power plants involving formed tees meeting the requirements of ASME B16.9. These failures have occurred in tees operating in high temperature steam line systems where the material of construction has been Grades 22, 91, or 92.

The potential significance of these failures to the safety of plant personnel and the reliability of the units affected is sufficiently great that a program of assessment has been developed to identify tees at risk of premature failure based on the tee design, the material of construction, and the operating conditions.

Key Takeaways

  • Learn about the history of ASME B16.9 tee failures made of material Grades 22, 91, or 92.
  • Understand Construction Code (ASME Section I, B31.1) requirements, gaps when using tees in a power boiler or in power piping systems.
  • Review the details of a structured program to mitigate the risk of premature failure based on the tee design, the material of construction, and the operating conditions.

Speakers

Jayaram Vattappilly, P-Eng, Vice President, HSB Codes and Standards

Jay Vattappilly is currently Vice President of Codes and Standards (C&S) for HSB Global Inspection and Engineering Services. He oversees the C&S group, as well as all the services carried out by the group, including technical support, internal and external training, management of HSB knowledge databases, and global design review activity. His past professional experience in the area of pressure equipment construction includes working in various roles such as QA/QC engineer, inspection engineer, welding engineer, and design engineer of pressure equipment constructed to ASME Sections I, IV, B31.1, and VIII. 

He earned a Mechanical Engineering degree from the University of Calicut, India; a Master of Engineering in Welding degree from National Institute of Technology (NIT), Tiruchirappalli, India; and a Master of Advanced Design and Manufacturing degree from the University of Waterloo, Ontario, Canada. Jay is also an active member of ASME and sits on many Boiler & Pressure Vessel Code technical committees.

Jeff Henry, President and co-owner, ATC

Jeff Henry is currently President and co-owner of ATC, Inc. His professional experience has been concentrated on the service performance of power plant materials, with particular focus on high temperature behavior, welding, manufacturing, and the creep strength-enhanced ferritic steels, such as Grade 91. 

He earned a Master of Science degree in Metallurgical Engineering from University of Tennessee-Knoxville and has authored over 60 technical papers and is an ASME Fellow and active on a number of ASME Boiler & Pressure Vessel Code technical committees. He is the former chair of BPV II, the Materials Standards Committee, and he chaired the Working Group on Creep Strength-Enhanced Ferritic Steels for the first ten years of its existence. He is a member of BPV I (Power Boilers) and the Management Oversight Technical Committee (TOMC).