Contact US

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

Nozzle reinforcement calcuation

Nozzle reinforcement calcuation

Nozzle reinforcement calcuation

Hi Experts,

I'm a beginner in Pressure vessel design and obviously to asme sec VIII div 1 code.

I have few questions regarding the nozzle reinforcement calculations this is just for my understanding of the code

1. Shell ID= 55 inch
2. Nozzle Dia =30 inch Location: on the Shell
3. Nozzle Dia =30 inch Location: on the head

obviously, 1.& 2. will exceed UG-36(b)(1) requirement and for reinforcement calculation it will consider both UG-37 and App 1-7 as the nozzle is on the shell.

how about 1.& 3. for the reinforcement calculation will clause to be consider, as the nozzle is located on the head.??

Please shed some light.

thanks in advance

RE: Nozzle reinforcement calcuation

Any suggestions please

RE: Nozzle reinforcement calcuation


See UG-36(b)(1): "... The rules in UG-36 through UG-43 apply to openings not exceeding the following: for vessels 60 in. (1 500 mm) inside diameter and less, one-half the vessel diameter, but not to exceed 20 in... For openings exceeding these limits, supplemental rules of 1-7 shall be satisfied in addition to the rules of this paragraph. Alternatively, openings in cylindrical or conical shells exceeding these limits may be designed for internal pressure using the rules of 1-10 [see (c)(2)(-d)]."

Note that 1-10 is only for openings under internal pressure in cylindrical and conical shells. So for (1) and (2) you could use 1-7 or 1-10 but for (1) and (3) you would only be able to use 1-7.

Hope that helps!


RE: Nozzle reinforcement calcuation

See UG-36(b)(2) for size limits for nozzles located in heads. There aren't any.

RE: Nozzle reinforcement calcuation

Thanks for the correction TomBarsh. My mistake, you must use UG-37 for heads, not 1-7. Hopefully the title of 1-7 was enough of a heads up of my mistake... "1-7 Large Openings in Cylindrical and Conical Shells."

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


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