Piping Archives - The Equity Engineering Group, Inc.

Effects of Friction on Rotating Equipment Compliance: Modeling Considerations in Pipe Stress Simulation

Sep 26, 2025

A recurring challenge is ensuring that modeling assumptions in pipe stress analysis don’t create hidden risks for rotating equipment and piping code compliance. This article explores how friction and vertical support behavior can dramatically influence nozzle load calculations, sometimes turning a compliant system into a non-compliant one. Using case studies and practical examples, the authors highlight best practices and advanced tools like SIMFLEX-IV to improve accuracy and reliability across complex operating conditions.

Analysis of Piping Surge Events

Nov 25, 2024

Surge events in piping systems can lead to severe displacements, loud noises, and operational challenges. Using a case study, this article highlights the factors behind surge events, including rapid changes in liquid velocity and pressure, and how forces generated during these transient events can impact piping systems. The authors discuss how a few targeted support modifications effectively resolved these issues without resorting to costly system overhauls or potentially problematic specialty equipment.

Addressing Piping Vibration in the Oil, Gas, and Petrochemical Industries: The Upcoming API 579 Part 15

Nov 25, 2024

With the recent API Fall Meeting, it is timely to revisit this November 2023 article on API 579 Part 15, Methodologies of Piping Vibration, featuring insights from one of the new standard’s co-authors, Mike Bifano. This article discusses the three-tiered evaluation system and explains how vibration fits into a mechanical integrity program. Read more and learn about the highly anticipated improvements to our industry standards.

Guide to API 618 Acoustic-Mechanical Design Validations for Repurposed or Modified Reciprocating Gas Compressor Systems

Nov 28, 2023

Pulsation-induced forces can damage compressor foundations, reduce valve life, and lead to fatigue in piping and components. In this article, Dr. Bifano explains acoustic pulsation basics in reciprocating gas compressor systems and offers practical guidance on applying original acoustic-mechanical design principles during system modifications or repurposing. It’s essential to understand how these changes may affect system acoustics to prevent future vibration issues.

Improving Reliability of Bolted Flanged Joints

Nov 28, 2022

ASME VIII-1 Appendix 2 flange design rules states flanges should be sufficiently robust to withstand the stresses produced by operating loads; however, what happens if those flanges leak during operation?. Do you know what options are available to reduce or eliminate the potential risk of leakage in bolted flange joints? In this article, Bob Davis introduces several options to evaluate bolted flange designs with the goal of minimizing the risk of leakage without risking damage to any of the joint components.

SIMFLEX-IV: A Modern Pipe Stress Engineering Solution

Nov 28, 2022

SIMFLEX-IV, the latest update to E²G’s cloud-based piping stress analysis software, will help you prevent potential failures by improving the structural integrity of piping systems and supporting structures. In a single run, you will be able to assess sustained, occasional, and displacement stresses at every data point throughout the piping system. This article introduces you to fast and easy ways to integrate advanced static and dynamic piping stress analysis into your daily workflow.

Hammered Pipe Still Standing: Is It Fit for Service?

Nov 28, 2022

Steam piping systems that are not adequately controlling condensate levels may experience a steam hammer event, which is when a slug of condensate is propelled at high velocity down the piping system. When the large dynamic slug force hits an elbow or pipe cap, it can displace the piping system or slide the pipe shoes off the structural members. In this case study, Kraig Shipley discusses a recent consulting project that used SIMFLEX-IV to determine if a steam header was still fit -for -service after a steam hammer event.

Equity Engineering Practices: Best Practices for Capital Projects, Repurposing Projects, and Lifecycle Management

Aug 25, 2022

The EEPs help owner/users manage equipment and facilities from “cradle to grave,” over the entire lifecycle of their equipment and infrastructure. In this article, Joel Andreani and Susie Szymanski explore how the history of the EEPs and E²G’s dedication to expanding the collections has helped owner/users improve operational reliability and reduce costs.

How Playing Battleship Helps with CML Optimization

Jul 22, 2022

As a child, many of us played the game Battleship. But did you know this game provides a great introduction to Bayesian updating and corrosion monitoring location (CML) optimization? Using the Battleship analogy, Branden Stucky introduces the Bayesian Optimized Asset Reliability (BOAR) assessment and provides insight into how to combine expert knowledge with collected data to identify corrosion rates.

Is Advanced Statistical Analysis the Next Step in Your Piping Inspection Journey?

Jul 22, 2022

Advanced statistical analysis can provide measurable benefits and new insights into corrosion management, especially when the knowledge is shared across an organization. In this Inspectioneering Journal article, Chris Massengale and Robert Clarke discuss how the implementation of this advanced analysis with other best practices will provide a better understanding of corrosion risks, optimize maintenance costs, and create safer facilities.

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