×
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

Api tank with an intermediate cone API 650/API 620/ EN14015.

Api tank with an intermediate cone API 650/API 620/ EN14015.

Api tank with an intermediate cone API 650/API 620/ EN14015.

(OP)
Dear Colleagues:

At this moment , i'm designing a tank using European standard to perform all calcs. But when I try to obtain results for conical course with apex angle equal to 30 or less.

The exactly problem is to find an method using referred codes to determine requires thickness in above cone. Using certain softwares, I can reach to introduce their geometry and materials but unfortunatelly , I can't get a logical way by means of equations.

Could anybody to recommend me any code (diferente to ASME) or simmilar to get reasonably results, ways of reinforcement (use of some courses to fabricate cone with different thickness from bottom to top. Any advise will be apreciated.

The shape of this tank aprox is 5 meter diam, cone 5.2 m length (from 5 m to 10 mm ) 10 meter diameter part and conical roof.
Total elevation of top part of upper course is 42 mm from base (0 meters)

Best regards and thanks in advance.

RE: Api tank with an intermediate cone API 650/API 620/ EN14015.

First off, I'm not sure I understand exactly what your shape actually is.

The methods in API-620 can be applied to a variety of shapes with an axis of symmetry. If it's a standard tank shape, it's fairly straight-forward. If it's not a standard tank shape, it may take additional terms and careful considerations of the signs and of the weights in the free-body to get the appropriate answers. This analysis won't give you bending stresses at the junctions, so it may or may not satisfy some other code (for example, can't be use for ASME vessels).

I believe Roark's Formulas for Stress and Strain and Timoshenko's Theory of Plates and Shells go into the bending and deflections of cones under different loading, and could be used for a solution if bending stresses were also required. It's likely to get complicated.

API-620 and similar codes will give you allowable stress for axial load in a cylinder, which can be applied to a cone shape. API-620 does not address circumferential compressive stresses, though.

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