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

Minimum bonnet thickness

Minimum bonnet thickness

Minimum bonnet thickness

How can i calculate the minimum bonnet thickness according to a standaard? which standaard?


RE: Minimum bonnet thickness

Depends on;- which valve type/design/manufacturer/code and/or standard requirement.

ASME B16.34 could be your answer.

*** Per ISO-4126, the generic term
'Safety Valve' is used regardless of application or design ***

*** 'Pressure-relief Valve' is the equivalent ASME/API term ***

RE: Minimum bonnet thickness

Thank you very much

We can calculate the The minimum wall thickness according to ASME B16.34 with Table VI-1 Basis Equations for Minimum Wall Thickness and Table 3 Valve Body Minimum Wall Thickness.

But ASME B16.34 is saying nothing about the bonnet thickness. Please see attachment.

Thanks in advance for your time.

RE: Minimum bonnet thickness

I am having problems understanding how your attachment represents a 'bonnet'. Can you provide more detail such as what valve design are we discussing here.

*** Per ISO-4126, the generic term
'Safety Valve' is used regardless of application or design ***

*** 'Pressure-relief Valve' is the equivalent ASME/API term ***

RE: Minimum bonnet thickness

ASME B16.34 does not provide information on how to calculate the thickness of the bonnet flange. It only provides instructions regarding the required area of the bonnet bolting.

The valve designer must choose the method to determine the bonnet flange thickness. It could be any of the following:

1. Calculation using the flange formulas in the ASME Boiler and Pressure Vessel Code. Be careful to use the right formula.
2. Calculation using Roark's formulas for stress and strain.
3. Calculation using another method such as finite element analysis.
3. Pressure testing.
4. Any combination of these.

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


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