Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Pulsation study when you modify piping system on Reciprocating compressor discharge line?

Pulsation study when you modify piping system on Reciprocating compressor discharge line?

Pulsation study when you modify piping system on Reciprocating compressor discharge line?

Hi, I'm chemical engineer working in a refinery.
I'm working on a revamp project which installing some new equipment in existing process.
New piping route will be added for it and the tie-in point is somewhere on discharge line of reciprocating compressor.
We are not modifying existing compressors but the operating conditions will be changed a little bit.
We have original pulsation study data, but it has been about more than 25 years.

So I'm wondering that if I should do pulsation study even though we are only modifying lines related to the compressors.
I think pulsation study should be done because they are really old compressors and the operating conditions will be changed.
Because I'm not an expert on this field, please let me know about below..
(There are 3 compressors which design discharge pressure is about 200bar and composed of 3 stages.)

1. Normally, is it essential to do pulsation study when you modify piping systems?
2. In this case, should mechanical input data for pulsation study be changed because it's been years after first operation?
3. Any opinions or advice for this case.

Thank you for reading my question.

RE: Pulsation study when you modify piping system on Reciprocating compressor discharge line?

It depends on where the tie-in location ıs.The pulsation effect is very strong after the pulsation bottles until ıt meets a large volume and orıfıces for the purpose of the reduction of pulsation. More or less, for DN 150 or DN 200 discharge lines, around after 200 m might be sufficient for the new tie-in location without another pulsation study. I write this from my previous experience. In case the tie-in is before the large volume ıt definitaly will require another pulsation study.

I would think about the tie-in type as well. 90 deg tee connection might be problem. This type connection will be verified by the study due to the toning effect, vortices and the contribution on the vibrations.

RE: Pulsation study when you modify piping system on Reciprocating compressor discharge line?

To saplanti
Thank you for your reply.
So, you recommend pulsation study because there will be a new piping system, not because the compressors are old.
Does it have nothing to do with compressor's device life?

RE: Pulsation study when you modify piping system on Reciprocating compressor discharge line?

There is no straight answer, I guess the pulsation study will solve everything. I tried above to provide you the conditions that you may avoid the study.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - Strategies to Secure Connected Cars with Firewalls
White-hat hackers have demonstrated gaining remote access to dashboard functions and transmissions of connected vehicles. That makes a firewall a vital component of a multilayered approach to vehicle security as well as overall vehicle safety and reliability. Learn strategies to secure with firewalls. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - What is Generative Design and Why Do You Need It?
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
eBook - Simulation-Driven Design with SOLIDWORKS
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, we’ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close