×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

SILICON CARBIDE NITRIDE

SILICON CARBIDE NITRIDE

SILICON CARBIDE NITRIDE

(OP)
I need to determine acceptable torque limits for the silicon carbide nozzles that we produce. They range in size from 4" up to a 16" nozzle(300lbs). The flanges have the same number of holes and the same bolt holes as Class 150 flanges.  Bob  

RE: SILICON CARBIDE NITRIDE

You need to work toward keeping all of the preload stresses on the flanges in compression--not bending/tension.  You may need a thick metal "clamping ring" to allow this.

What sort of stresses are involved on the whole assembly--fluctuating or static?

RE: SILICON CARBIDE NITRIDE

(OP)
the nozzles range in size from 4" TO 16". A 4" nozzle would see a max force of 500lbs, a 6" nozzle would see a max force of 1100lbs, a 8" nozzle would see a max force of 2000lbs,  a 10" 3000lbs, a 12" 4500lbs, 14" 7000lbs, 16" 8500lbs.  Bob

RE: SILICON CARBIDE NITRIDE

(OP)
the load the nozzle would see is calculated by dead heading the nozzle. So inrelaity the nozzle may never see this type of load. the typical load on the nozzle while being used would be constant.    Bob

RE: SILICON CARBIDE NITRIDE

In that case you don't require a high preload on the bolts.  Just make sure all the mounting faces are FLAT in order to avoid imposing bending stresses and you should be OK.

Can you perform a trial and error test, or are you writing a spec?

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



News


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