INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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.

Jobs

Hydroforming Tubes

Hydroforming Tubes

(OP)
Greetings Automotive enthusiasts,

I have been thinking about an alternative to the cold working processes that my company uses to form pipe and I've read a little about hydroforming.  I was hoping that someone has expierence in this area.  We expand pipe circumferentially inside another pipe using a cone mandrel.  This reinforces older pipe that has eroded over time due to fluid flow.  Typically this is done without special fixures and only uses pressure behind a solid cone mandrel which is typically 10-15% larger than the ID of the deformable pipe.  Pressures usually rage about 6000psi for a 6 inch pipe that's expanded 12% inside a 6-3/4 inch pipe, for example.  Burst is obviously a concern for the older pipe, however this is overcome by containing the pressure only to the deformable pipe...esentially making it a pressure vessel.  Instead of using pressure behind a solid mandrel, why not use straight pressure in sections???  Questions arise on how to contain the deformation using some sort of dynamic seal.  Any thoughts??

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!


Resources


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