×
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.

Students Click Here

Structural Minimum thickness for Pipe sizes above 24"

Structural Minimum thickness for Pipe sizes above 24"

Structural Minimum thickness for Pipe sizes above 24"

(OP)
Hi,
Hope everyone is having a great time.
As we can see that API-574 (Table-6) dictates the structural minimum thickness for carbon and low alloy steel pipes but if the pipe size is more than 24" and MAWT is very low (even below the structural minimum of 24" pipe) then what criteria should be followed.
Thanks in advance
@SAhmad

RE: Structural Minimum thickness for Pipe sizes above 24"

Generally you want D/t ratios < 100
More than 100 will increase risk of ovaling and flattening during handling, transportation and fabrication.
https://www.allaboutpipelines.com/Article/Largedia...

You can Google "pipe D/t ratios" for a lot more info.

RE: Structural Minimum thickness for Pipe sizes above 24"

Can you post the section of table 6 so we all understand what you're talking about please.

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

RE: Structural Minimum thickness for Pipe sizes above 24"

API 574 is a piping inspection standard.
It should not be used for design.

Check your design code for Max D/t limits.
Ensure that your resulting pipe thickness meets all other design loading conditions as specified in your design code.
Ensure that your resulting pipe thickness will be sufficient to prevent excessive ovaling during handling and transportation.

RE: Structural Minimum thickness for Pipe sizes above 24"


Quote (Sarfrazahmad554
....As we can see that API-574 (Table-6) dictates the structural minimum thickness for carbon and low alloy steel pipes but if the pipe size is more than 24" and MAWT is very low (even below the structural minimum of 24" pipe) then what criteria should be followed.)


I think the subject table is table - 1 and copy and paste of the same,



One can see that the minimum wall thickness 6.35 mm (1/4 in) when the size is greater than 8 in. and less than 36 in .

For cs pipe, the minimum thickness shall also satisfy a minimum resistance to handling damage, buckling,internal pressure external loading etc...

You may look the same ( API RECOMMENDED PRACTICE 574 ) section 12 Determination of Minimum Required Thickness....

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

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