Inspectioneering
Inspectioneering Journal

Extended RBI for Exchanger Bundles

By Ricardo Gonzalez, Inspection SME at Total Refining and Petrochemicals. This article appears in the September/October 2019 issue of Inspectioneering Journal
5
Likes

Introduction

The application of risk-based inspection (RBI) to heat exchanger bundles presents several challenges related to effectiveness and feasibility. The user’s typical approaches vary from run-to-failure and/or turnaround calendar-based. These practices have proven to be ineffective for minimizing the impact on business interruption.

On the other hand, provided the large population of bundles and tubes to evaluate, the accuracy of available NDT methods on a small sample of the exchanger bundles can be poor. Inspection using NDT on a large percent of bundles is often not cost-effective when compared to bundle replacement.

The method discussed herein was developed based on API RP 581’s (API’s RBI Methodology) approach for metal loss, combined with statistical treatment of the NDT result/data using Extreme Value Analysis. This allowed us to optimize the scope of NDT during turnarounds, while improving the reliability of bundles. In addition, a better focus on process-related corrosion issues was achieved.

Starting in 2013 and focused on specific cases, this approach was applied to more than 1600 bundles at 10 sites in three years. Today it is fully implemented at most of our refineries and petrochemical facilities.

Background

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
GET STARTED
Interested in unlimited access? VIEW OUR SUBSCRIPTION OPTIONS

Current subscribers and registered users can log in now.


Comments and Discussion

Posted by Andres Rivero on November 4, 2019
Great article… thanks for sharing your... Log in or register to read the rest of this comment.

Posted by Andy Gysbers on November 5, 2019
Great article. Business loss RBI is a credible... Log in or register to read the rest of this comment.

Posted by COSIMO MARANGIO on November 7, 2019
Thank you Ricardo for the article, very clear. I... Log in or register to read the rest of this comment.

Posted by Ricardo Gonzalez on November 7, 2019
Hi Cosimo, thanks for your remarks and sharing... Log in or register to read the rest of this comment.

Posted by Ricardo Gonzalez on November 7, 2019
Thanks Andy. I fully agree with you. I attende a... Log in or register to read the rest of this comment.

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.

Job Postings

Discover job opportunities that match your skillset.

Case Studies

Learn from the experience of others in the industry.

Event Calendar

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

Industry News

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

Blog

Read short articles and insights authored by industry experts.

Acronyms

Commonly used asset integrity management and inspection acronyms.

Downloads

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

Videos

Watch educational and informative videos directly related to your profession.

Expert Interviews

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