Contact US

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!

*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

Centrifugal compressor hold down bolt design

Centrifugal compressor hold down bolt design

Centrifugal compressor hold down bolt design

What is the best method for mounting centrifugal compressor feet to the baseplate supports?

1. Bolt threaded directly into threaded hole on the baseplate.
2. Through bolt with nut and washer on the bottom.

The compressors I have seen use the bolt threaded directly into the baseplate. However, I would think that using a through bolt would give better flexibility during alignment and would be easier from a manufacturing perspective. API 617 doesn't seem to specifically exclude either method.

I can't think of any particular load issue as I have seen through bolts being used on generator mounts which have much higher load requirements.

RE: Centrifugal compressor hold down bolt design

A threaded stud through the base plate with spherical washers is what I've generally seen.

RE: Centrifugal compressor hold down bolt design

Is there any validity in the assumption that having a tapped hole with more thread engagement is a better fastener than a through hole with a bolt and a single nut of thread engagement?

RE: Centrifugal compressor hold down bolt design

Tapped and threaded hole is subject to mechanical work hardening, heating/cooling loosening, vibratory disengagement, entry of water and corrosion, dissimilar metallic contact corrosion, all more easily handled by a bolt chair, insulation and backing washers, nuts and a cotter pin.

Independent events are seldomly independent.

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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