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

Related Articles


Fiber Ring Joint Gasket - ASME Design

Fiber Ring Joint Gasket - ASME Design

Fiber Ring Joint Gasket - ASME Design

The Klingersil C4430, a synthetic fiber gasket reports the following m and Y values for various thickness values vs the corresponding in ASME Sec VIII Div 1 Mandatory Appendix 2 for Bolted Flange design Table 2-5.1.

Klingersil C4430, Thickness mm, m, Y psi
1, 4.5, 3625
2, 5, 3625
3, 5.5, 3625
ASME Table 2-5.1, Thickness mm, m, Y psi
3.2, 2, 1600
1.6, 2.75, 3700
0.8, 3.5, 6500

It is seen the C4430 has a higher value of m and a constant value of Y for increasing thickness of gaskets. It is customary to use the higher thickness for larger flange size fibre joints. Whereas the ASME listing has a lower m value and a lower seating stress for increasing thicknesses.

Will this even out with the variation shown for C4430 or is it that the ASME criteria needs a review vs the material attribute. What about the joints in class 150 and 300 or other classes that uses these values for design, will it require an evaluation for the joint rating.

RE: Fiber Ring Joint Gasket - ASME Design

svi, are you designing Appendix 2 flanges? If so, I'd use the gasket manufacturers' numbers. Apx 2 values are generic and non-mandatory.

"Will this even out with the variation shown for C4430..." - What do you mean by this?

B16.5 flanges need no evaluation of bolt area vs. gasket properties.



The problem with sloppy work is that the supply FAR EXCEEDS the demand

RE: Fiber Ring Joint Gasket - ASME Design

Be careful. You should consider a range other gaskets materials for the flange design. Someone may use a gasket other than C4430 in the future change the stresses in the flange.

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!


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