An Unfinished Chapter

An Unfinished Chapter

Philip A. Henry, P.E.

The inlet pressure drop rule is designed to protect pressure relief valves (PRVs) from instability; however, recent changes to API 520 allow the pressure drop to go above 3% of the set pressure if a supplementary engineering analysis is completed. This article, published in the September 2021 issue of World Fertilizer, discusses the improvements to the API codes and standards and how those changes impact the 3% rule.

Submit the form below to access this article:

Newsletter Archive

Access all of our previously published Industry Insights Newsletter articles:

Recently Published

Structural Engineering Applications for Fixed Equipment Analysis

Typically, maintenance teams are focused on a facility’s pressure vessels, piping, and tanks, which leaves structural infrastructure to be overlooked. In this article, Derek shares several case studies that highlight how combining structural and mechanical engineering approaches can solve several unique fixed equipment challenges.

Read More »

Nozzle Design – By Rule or By Analysis

Are you struggling with time-consuming finite element analysis (FEA) for nozzle connections? The Nozzle FEA tool will cut FEA analysis time from weeks to minutes while ensuring full ASME VIII-2 compliance. In this article, the authors compare nozzle design by rule to design by analysis and highlight how this webtool consistently outperforms the competition.

Read More »

Practical Electrical Considerations in Process Plants

Electrical systems are often overlooked in process plants—that is, until something goes wrong. This article shares practical best practices to improve power reliability, reduce downtime, and strengthen the safety and resilience of your facility’s electrical infrastructure.

Read More »
Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors
Pages
Industry Insights Newsletter Articles
Events
Library Items