INDUSTRY INSIGHTS ARCHIVE

Sigma phase embrittlement is a concern for austenitic stainless-steel components in FCC units and other internal welds in FCC regenerators. Prolonged exposure to high temperatures can lead to sigma phase formation, reducing toughness and ductility and increasing the risk of creep cracking. In this article, the authors explore preventive measures to mitigate sigma phase formation and the importance of weldability testing to increase the reliability of FCC units.

Creep, a common damage mechanism across the refining industry, is commonly often found in fired heaters and boilers. In this article, Lucas offers a detailed description of an Omega creep test and shares the benefits of performing this analysis to accurately diagnose current damage and extend the remaining life of a facility’s fired heater tubes.

Welds are often the weak links in pressure equipment and other structures, especially when operated at elevated operating temperatures. This article highlights the importance of understanding the high-temperature behavior of welds, specifically in relation to creep response, and discusses how creep testing helps to predict remaining life.