Whiteboard Discussion: The Importance of API RP 581 Inspection Effectiveness Tables

April 24, 2017

Video Description

In this latest Whiteboard Discussion, Greg Alvarado discusses the role of grading the effectiveness of inspection strategies and its importance in determining the amount of uncertainty in the Probability of Failure (POF) portion of the risk analysis. The higher the effectiveness, the higher the confidence in the knowledge of the true damage state of the equipment. The strategies should address all credible damage mechanisms that are risk drivers that require attention per the risk analysis.

In addition to the direct link between NDE techniques versus damage mechanisms and amount of coverage to achieve the proper level of effectiveness, this discussion covers how one may also consider using the tables and gradings to address other issues like the qualifications of the NDE operator. For instance, if one is looking for HIC/SOHIC with AUT and the operator has his/her ASNT certifications, internal certifications from the employer, and has passed the API QUTE exam but not taken the owner operator's internal qualification demonstration test for HIC/SOHIC and AUT, one could consider making it a policy to downgrade the effectiveness in such a case. On the other hand, the owner-operator could consider the API QUTE certification as adequate to achieve the level of effectiveness prescribed in their inspection effectiveness tables. It is up to the owner/operator to make these types of determinations and to be consistent in their application.

Watch more Whiteboard Discussion videos:


Stay up to date with all things mechanical integrity and inspection.

Every Monday, we send out a newsletter containing the latest Inspectioneering articles, blog posts, industry news and events, and more.

Sign up below to start getting the newsletter in your inbox.

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.