Pressure Relief Archives - The Equity Engineering Group, Inc.

Vessel Overpressure Protection Using System Design – No Relief Valve? You’re Kidding, Right?

Feb 25, 2025

Author: Phil Henry, P.E., Process Technology Team Leader, Principal Engineer II

Even though PRDs are the industry standard for overpressure protection, there are cases when an instrumented system design approach can be a good alternative, if it meets ASME Section XIII, Part 13 requirements. Within this article, Phil Henry outlines key considerations, from assessing feasibility to ensuring compliance, and the key questions all owner-users should be asking.

Ensuring Pressure Relief System Integrity Using a Comprehensive PRS Audit Approach

Feb 25, 2025

Author: Phil Henry, P.E., Process Technology Team Leader, Principal Engineer II

A well-structured PRS audit process helps verify system integrity, update records, and ensure overpressure protection remains effective. In this article, Phil Henry outlines the key elements of an effective auditing program, from planning and execution to reporting and continuous improvement.

Are There Gaps in Your Pressure Relief Program?

Jul 30, 2024

Authors: Nicholas Plentovich, Staff Engineer I; Phil Henry, P.E., Process Technology Team Leader, Principal Engineer II

Pressure relieving systems serve as the last line of defense against the dangers of overpressures in our facilities, but this protection can be jeopardized by poor maintenance and degradation. Active safeguarding of this protective system is crucial to preventing catastrophe. While the requirement for pressure relief is rooted in the ASME code, it is the US CFR 29 1010.119 [1] that requires the proper documentation of relief system design and design bases.

Leveraging Process Simulation for Informed Decision-Making

Jul 25, 2023

Author: Nicholas W. Plentovich, Engineer II

Process simulation models changes to a process, operations, or pressure relieving systems. Proactively simulating proposed changes at your facility will save money, improve safety process, and increase equipment reliability. In this article, you’ll read how investing in the long-term maintenance of your simulations will lead to better insights into the downstream effects of any changes and help you troubleshoot any process upsets.

Managing Tube Rupture Failure Risks in Pressure Relief Systems

Jul 25, 2023

Author: Manuel J. Sanabria Urriola, Senior Engineer II

API 521 outlines the requirements for analyzing the credibility of a tube rupture and how to design overpressure protection in heat exchangers. Determining the credibility of a tube rupture can save a facility money on costly mitigation measures. In this article, you’ll learn about E2G’s proprietary tube rupture credibility assessment (TRCA) methodology and the four components needed to address API 521 requirements.

An Unfinished Chapter

Feb 22, 2022

Author: Philip A. Henry, P.E.

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.

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