Dear Imran,
I suppose Dampers can be used for solving this Problem
Regards,
Rajkumar M
From: PipingDesign@yahoogroups.com [mailto:PipingDesign@yahoogroups.com]
On Behalf Of jun_atibo
Sent: Thursday, April 05, 2007 12:05 PM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Re: Vibration
I dont know Imran, but I doubt you could use CII to fix a problem
related to piping vibration. Get a vibration analyst arm with a tool
to measure velocity and frequency to figure out the mode shape and
severity (before and after) - is the way i would approach this.
I would realy like to get an example of piping having a high
vibration severity that was fixed using exclsuively CII.
For the newbies, my suggestion is to Check out several articles that
appeared in Engineering Dynamics related to piping vibration. Or
better yet the SwRI paper (no its not posted in their website but if
u knew somebody who have used the services of SwRI before then get
of copy of the their fine article written about piping vibration -
its very good).
- In PipingDesign@yahoogroups.com
<mailto:PipingDesign%40yahoogroups.com> , "Farhad" <farhad_ss@...>
wrote:
>
> Dear Imran,
>
> Definitely, you should use CAESAR II software to solve this
problem.
> There are a few steps as follows:
>
> 1- Collect field data (displacements, RPM of pumps, pipe support
> configuration, etc.)
> 2- Model piping system in CAESAR II.
> 3- Run static analysis.
> 4- perform Harmonic analysis and enter harmonic displacement at
pump-
> pipe node.
> 5- Tweak some dynamic parameters to model exact problem.
> 6- Add some stiffness (pipe support) to your piping system,
wherever
> possible.
> 7- Run static then dynamic analysis to see changes.
>
> I hope it helps you.
>
> Regards,
> Farhad
>
> --- In PipingDesign@yahoogroups.com
<mailto:PipingDesign%40yahoogroups.com> , "Imran M Ahmed" <imahmed@>
> wrote:
> >
> > Hello Guys!
> >
> >
> >
> > We are facing vibration problem in the piping system of our
plant.
> The
> > scenario is that the lean Amine pumps operate with a vibration
of
> approx
> > 6 mm/sec pk on DE and 3.8 mm/sec pk on NDE. The vibration gets
> > transmitted through the piping into the standby pump which is
not
> in
> > operation. The vibration recorded on the standby pump is
> approximately
> > 3.0 mm/sec pk. Do you have suggestion how to control this
> vibration?
> >
> >
> >
> > Regards,
> >
> >
> >
> > Imran Ahmed
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
[Non-text portions of this message have been removed]
Received on Thu Apr 05 08:52:00 2007