×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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

Opening in Tall Heavy Cylinder

thread1452-454048

Opening in Tall Heavy Cylinder

Opening in Tall Heavy Cylinder

(OP)
Hello, have an empty steel cylinder 2.6m diameter, approx 50m tall with 25mm wall. It's a piece of process plant. Need to cut an opening near base of cylinder approx 1000 x 1500mm. There is approx 90Te dead weight above the opening. Do you think I need to reinforce hole to support dead weight, prevent bucking or other fairly catastrophic failure modes? There is mo conventional hoop stress as cylinder is empty.
Appreciate your thought! Matthew.

RE: Opening in Tall Heavy Cylinder

Calculate the required thickness to support the loads in question (based on axial compression), then see if the excess plate thickness around the hole is adequate to reinforce the opening. From the description, it sounds like it would be no problem, but that's how you'd confirm.

RE: Opening in Tall Heavy Cylinder

That sounds like a fairly big hole to me.

What is the shape and which of those dimensions are vertical and circumferential?

You also need to consider bending and moments as I guess this is some sort of chimney?, hence subject to wind loading etc.

Sounds a bit like an FEA job to me but I can't see how you can really just cut out this sort of size hole without some decent re-inforcement.


we have about 5% of the required information here....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Opening in Tall Heavy Cylinder

This sounds a lot like the evaluation of the exhaust gas hole in a thin steel stack.

Everyone I have seen has had a frame reinforcement

Find the calculation method contained in ASME STS-1–2006, the design guideline for steel stacks.

MJCronin
Sr. Process Engineer

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

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now