Prevent failures in olefin-cracking operations
Failure analysis identifies root causes for damages to selective exchangers
At the Nagothane olefins facility, the inner thermal sleeve,
constructed with Incolloy 800H, for double-pipe ultra-selective
exchangers (USXs) of an ethylene cracking furnace showed
grooves/pitting/fissures damage after 14 years of service.
Metallurgical examination and testing of the damaged samples
revealed that the damage to the USX Alloy 800H thermal sleeve
occurred due to metal dusting, a phenomenon caused by elevated
temperatures and failures in the purge-steam supply. In this
case history, the authors discuss how the damaged USXs were
replaced and the selection
process for a better design without a thermal sleeve was
To continue reading please, log in to hydrocarbonprocessing.com.
Subscribe now for premium access and unlimited access to the site, including archived articles and the process handbooks. Start a free trial to gain access to articles from the current issue of Hydrocarbon Processing.
Already have an account?
Subscribe today and gain unlimited and immediate access to the site. Plus, you'll receive the next 12 issues of the magazine in your choice of print or digital format. Start your subscription today.
Start a free trial and gain immediate access to the current issue of the magazine plus additional, select content.
30 Day Trial