Don’t under predict your water hammer forces.  There are several cautions that should be applied when using the Joukowsky equation as a first approximation of fluid transient pressures.

At the 2018 Pressure vessel and Piping conference in Prauge, Czech Republic Trey W. Walters P.E. of Applied Flow Technology and Robert A. Leishear, Ph.D., P.E. of Leishear Engineering, LLC presented a paper on When the Joukowsky Equation Does Not Predict Maximum Water Hammer Pressures.

Read the paper here: When the Joukowsky equation does not predict maximum water hammer pressures

In the paper, caution is provided for separate phenomenon which can increase pressures greater than those predicted by the Joukowsky equation.  These conditions include reflected waves at tees, changes in piping diameter, and changes in pipe wall material, as well as frictional effects referred to as line pack, and the effects due to the collapse of vapor pockets.

Using AFT Impulse, we predict these phenomenon and avoid non-conservative estimations of water hammer pressure surges.

Questions? gmontgomery@ecedesign.com or leave a comment below.

ECE Design has posted “What’s new in CADWorx Structure 2018”.   This webinar focuses on the major feature enhancements to the CADWorx Structure application which are now available:

• Build Spiral Staircases easily with the new spiral staircase function.
• Create Piers, Slabs, or combination Pier/Slabs that auto-size to your base columns.
• Create Regular, tee, or tapered tee walls for refining structural design.
• Create concrete slabs with optional metal decking for floor design.
• New tools for automating drawing creation process from CADWorx Structure models.
• New capability for exporting your structural model directly to structural analysis.

Watch the recorded webinar here!

ECE Design has posted Getting Started with CAESAR II: The first 15 minutes.  During this webinar, Analysis Application Engineer Carlos Valdez describes various setup utilities and features of CAESAR II that may be unknown to new users.

Update – Latest Microsoft Security update from 11/15/2017 has resolved this issue.

Click here for the Recommended Solution.

---

EDIT: Update – Microsoft has resolved the issue.  MTOWorx for CADWorx is again available as a 30 day trial.

To provide assistance while users encounter this break in critical functionality of CADWorx Plant, ECE Design will grant users free access to MTOWorx for CADWorx until a resolution has been provided by Microsoft. MTOWorx for CADWorx is not impacted by the Microsoft update KB4041676. Request MTOWorx here.

---

Request a copy of MTOWorx here. RE: Enter in the “comments” section the Error in the Picture Above to enable your access until Microsoft issues a fix.

---

MTOWorx is a CADWorx plugin that enables you to:

• Export data from CADWorx to Microsoft Excel in Multiple Formats
• Read Bills of Material directly in CADWorx Plant
• Use Excel style filtering directly in CADWorx Plant
• Include/Exclude controls for welds, generic, existing, fabrication, erection, miscellaneous, isogen type components.
• Roll up Bills of Material across Multiple Xrefs for an entire project.
• Compare Bills of Material to determine additions / deletions for material take off purposes.

Need More Help? Contact us at:

support@ecedesign.com

Regards,

-George 

 

 

 

 

 

 

The Intergraph Process, Power & Marine team has released CAESAR II 2018. This release is now available for order from ECE’s Sales team.

To access this release:

Log on to ECE’s Support Portal at  support.ecedesign.com, and send a ticket in to request the new update.  

Note: Customers on maintenance will be upgraded automatically.  

If you have trouble accessing this site or need further information, please send us an email us at support@ecedesign.com and we will be happy to assist you.

CAESAR II 2018 New Features:

• Now supports a KHK Level 2 analysis of the stability of a piping system during a serious seismic event, helping ensure the safety of facility piping in earthquake-prone areas.
• Ability to identify and track supports throughout the software using new support and hanger tag fields. When a user deletes a load case, the software automatically renumbers remaining cases and indicates any impacts from the deletion to combination cases.
• Quick model changes are also possible with the Find & Replace option in the list inputs.

Find out more about CAESAR II 2018 here:, and request an evaluation here.

Thanks,

-George

gmontgomery@ecedesign.com