Inspectioneering Journal

Hydroprocessing Reactor Integrity

The Basics

By Dr. Brian Cane, Asset Integrity Specialist, and Julian Speck, Structural Integrity Department Manager at TWI Ltd. This article appears in the November/December 2004 issue of Inspectioneering Journal.

Demanding Cleaner Fuels

Environmental regulators drive refiners to introduce bottom-of-the- barrel conversion hydroprocessing units, to produce cleaner fuels. These include hydrotreaters and hydrocrackers with reactors that operate at high temperature, and pressure and in the presence of hydrogen. (Catalytic reforming units are in the same category, with respect to the challenge of ensuring the integrity of reactor vessels).

The planning of reactor inspections is complicated because it requires consideration of the resistance to pressurised hydrogen, alloy stability at operating temperature, ambient temperature properties (for heavy- walled vessels), resistance to high temperature H2/H2S corrosion, and the resistance of austenitic alloys to stress corrosion cracking (SCC).

This content is available to registered users and subscribers

Register today to unlock this article for free.

Create your free account and get access to:

  • Unlock one premium article of your choosing per month
  • Exclusive online content, videos, and downloads
  • Insightful and actionable webinars
Interested in unlimited access? VIEW OUR SUBSCRIPTION OPTIONS

Current subscribers and registered users can log in now.

Comments and Discussion

There are no comments yet.

Add a Comment

Please log in or register to participate in comments and discussions.

Inspectioneering Journal

Explore over 20 years of articles written by our team of subject matter experts.

Company Directory

Find relevant products, services, and technologies.

Training Solutions

Improve your skills in key mechanical integrity subjects.

Case Studies

Learn from the experience of others in the industry.


Inspectioneering's index of mechanical integrity topics – built by you.

Industry News

Stay up-to-date with the latest inspection and asset integrity management news.


Read short articles and insights authored by industry experts.

Expert Interviews

Inspectioneering's archive of interviews with industry subject matter experts.

Event Calendar

Find upcoming conferences, training sessions, online events, and more.


Downloadable eBooks, Asset Intelligence Reports, checklists, white papers, and more.

Videos & Webinars

Watch educational and informative videos directly related to your profession.


Commonly used asset integrity management and inspection acronyms.