Ensure dynamic loads on pipes can handle the forces they are submitted to
ASME B31.3 Process Piping: "Max stress from the surge pressure shall not exceed 1.33 times the allowable stress for the operating temperature."
Why do engineers need to retrieve dynamic forces on pipes, from surge, to perform stress analysis?Waterhammer imbalances must be considered during the design of structural supports as they must be able to handle the forces they will be submitted to.
It's nearly impossible to analyze pressure behaviors by hand. It's more accurate to use modeling tools like AFT Impulse to generate force results. It's even easier to take those forces and export them into pipe stress analysis software. Programs such as Caesar II, TRIFLEX, or ROHR2 can determine the amount and type of support your system will need to hold up against waterhammer events.
Calculate Transient Forces For Pipe Stress Analysis
It's natural for process or mechanical engineers to understand how surge leads to high pressures, and that materials need to be able to withstand those. There are unbalanced (dynamic) forces that hit pipe sections. Impulse will give you those forces to then use for stress analysis. Check out the webinar below.
Still have questions after watching the webinar? Check out this Q&A Blog, containing 28 questions and answers surrounding the video.
Accurately Predict Transient Forces in Piping Systems Part 1: Fundamentals Part 2: Application
Calculating transient forces on a piping assembly may appear to be a straightforward task. However, the complexities of control volume definition, accurate bookkeeping of signs, and challenging determination of some transient terms creates complication. This leads some engineers to use the Endpoint Pressure Method to streamline the problem. Read how this method is incomplete, and in some cases dramatically misestimates the force values.
UPCOMING TRAINING
No matter your user level with AFT software products, we have training and assistance available to help you continue your education, or tools to advance your knowledge to expert levels.
RECORDED WEBINAR Predicting Transient Pipe Forces Caused by Water and Steam Hammer
Transient Pipe Forces can reach magnitudes upwards of 10,000 lbf (50 kN) during routine operations such as valve closures or pump trips. The only practical way to safely and confidently calculate such forces is with fully-featured fluid transient simulation tools like AFT Impulse and AFT xStream. Learn why and how to confidently validate your force values.
UPCOMING WEBINAR Importance of Valve Inherent Characteristics for Waterhammer Analysis Wednesday, October 19, 2022 10 - 11:00 AM (MDT)
An in-depth look at valve behavior and how that can effect the waterhammer simulation results for the pressure response of a valve closure. This will include a discussion on the difference of inherent characteristics vs. installed characteristics.
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