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

Annex P Figures P.2a-l

Annex P Figures P.2a-l

(OP)
Hello all,

I am going through the sample problem in Annex P and familiarising myself with the formulas, methodology etc...

I noticed that Figures P.2(a-l) are applicable if L/2a = 1.0 or L/2a = 1.5

My query is that if you have an L/2a value greater than 1.5 ( lets say 4.0 for e.g ) would you just use the graphs for L/2a = 1.5?

Also i'm sure this topic has been approached numerous times before but....

if we have a tank less than 36m diameter am I correct in saying that we can still use the methodology outlined P.2.7 for allowable nozzle loads if agreed by the purchaser, or do we specifically have to use Finite Element Analysis software to do this?

Your comments and feed back are much appreciated.

RE: Annex P Figures P.2a-l

If I remember right, where the 100'/36m limitation came from is that in the derivation of the method, in order to simplify it, it was assumed that shell thickness was proportional to pressure. On tanks where the thickness is governed by minimum thickness, that is not true. You might look up the two technical papers referenced. If the tank in question is large enough to fit this assumption, then consider using the method shown.

RE: Annex P Figures P.2a-l

(OP)
Thanks JStephen,

The tanks are approx 75 ft Diameter and 60ft high and the calculated thicknesses for the lower 3 shell tiers are above the code governing minimum thicknesses ....so im hoping I should be ok using the formulas and nomograms per Annex P.

Did you have any thoughts on how to use Figures P.2(a-l ) for an L/2a value greater than 1.5?

Thanks again for your comments.

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