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Steady State Model for Waterhammer




Waterhammer For Engineers: How to decrease your modeling time by 80%  


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Did you know, you can import existing
AFT Fathom models into AFT Impulse to simulate
transient events that cause waterhammer?

Decrease your modeling time by 80% when you import your
AFT Fathom model directly into AFT Impulse using the same
interface and functionality you appreciate from AFT.
We are 100% confident that engineers who use AFT Impulse
will design a more durable and efficient pipe flow system.
Find out why you should analyze your system for waterhammer.

Ensure your system can handle surge.
Follow 4 easy steps. 

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Import your AFT Fathom
model into AFT Impulse

After you have designed a model in AFT Fathom, import your model to AFT Impulse to avoid serious damage and strain that can occur during rapid transient events. AFT Fathom and AFT Impulse are designed to have a nearly identical interface, allowing for a quick import with minimal changes necessary to perform a surge analysis.

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See how Kiewit Power Engineers used the same model in both
AFT Fathom and AFT Impulse  

“Being able to roll over the model into
AFT Impulse from Fathom and edit as
necessary is a great time saver. Then setting
up all of the different scenarios and being able
to take the results and produce graphs of the transient system, all within one program saves time and effort.”

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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.



Would Newton Approve of How
You Are Using His Law? How to
Improve Safety and Accuracy in
Pipe Force Predictions.

Wednesday, September 21, 2022
10 - 11 AM (MDT)

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All engineers know Newton’s Laws.
A valve closure, pump trip in liquid systems,
steam turbine trip in steam systems or any
other operational change will propagate pressure waves in the piping system that can generate
dynamic loads in pipe legs upwards of
10,000 lbf (50 kN). Maintaining system safety
and function requires a system designed
with these transient fluid forces in mind.
These forces can be accurately calculated with Newton’s Laws, but simplifying assumptions are
often made. Fortunately, tools like AFT Impulse
(for liquid transients) and AFT xStream
(for steam and gas transients) can handle
these complex calculations with ease –
always delivering accurate forces. Join this
webinar to hear about common pitfalls in
applying Newton’s Laws to predicting forces
in piping systems, and to see how AFT’s
transient simulation tools make calculating
complete and accurate transient forces
practically effortless.


Close your valves the right
way with AFT Impulse

Wednesday, September 7, 2022
10 - 11 AM (MDT)

Valve closures are unavoidable,
whether from emergency shutdowns,
simple flow redirections, or anything in between.
Figuring out the right way to close is nearly
impossible without modeling software. There is
no one-size-fits-all solution. The effective closure
time is unique for every valve in every system -
because it does not just depend on the valve
and does not just depend on the system.
It depends on the combination.



Turbomachinery & Pump Symposium
12-15 September 2022, Houston, Texas
Booth 1420

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Join us! TPS is a vital industry event, offering a forum
for the exchange of ideas between rotating equipment engineers and technicians worldwide. Now surpassing
49 years, TPS is known for its impact on turbomachinery, pump, oil & gas, petrochemical, power, aerospace, chemical and water industries through two pathways: Technical Programs and Exhibitions



When there are so many demands for your attention in the office, it can be hard to focus on
Zoom and Teams trainings. This is why AFT offers in-person training seminars. Whether you're new or experienced, you'll find AFT seminars a worthwhile investment of your time.

AFT Impulse™
Location: Colorado Springs, CO, USA
October 5-7  |  3-Days  
*Advanced Class. New users must take AFT Fathom in combination with this class.

  • Understand surge communication times
  • Modeling transient cavitation
  • Model pump transients, including​​​​​​inertial effects
  • Modeling time & event based transients
  • Model relief & vacuum breaker valves
  • And more!

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transients in piping systems caused
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