×
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!
  • 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

Jobs

Tailing lug on bottom head of vertical pressure vessel

Tailing lug on bottom head of vertical pressure vessel

Tailing lug on bottom head of vertical pressure vessel

(OP)
Normally I put the tailing lug on the shell of vertical vessels with no problems as this is a standard feature in Compress.

However, there are situations in which the shell thickness is thinner than the head thickness and then it may be advantageous to put the tailing lug onto the bottom head near the knuckle. Unfortunately, this is not supported by Compress so I am working on determining the stresses that the load puts onto the membrane of the vessel at this location.

I need to consider that now the lug is on a curved section, so I put a standard lug onto the top head knuckle to see how compress calcs this. They use a value referred to as the "Equivalent Inner Diameter".

I am left with 2 questions:
Does anyone know if this value is meant to replace the ID on a shell designed lug in order to account for the curved surface of the head?

And

In the calculation for the equivalent ID, they describe 'x' as "the distance between the axis of semi-ellipsoidal head and the center of the lug". What is this referring to? On a 42"ID head it calcs a value of 3.42" so its certainly not the axis of the vessel.

Thanks!

RE: Tailing lug on bottom head of vertical pressure vessel

Did you try the Compress users Group forum on top of your left hand forum list?  

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