×
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

Jacket Space Width (ASME SECTION VIII DIVISION 1)

Jacket Space Width (ASME SECTION VIII DIVISION 1)

Jacket Space Width (ASME SECTION VIII DIVISION 1)

(OP)
In 'Mandatory Appendix 9 - Jacketed Vessels' there is an equation to determine the maximum jacket width based on your jacket type. This value is the maximum distance between the outer radius of the shell and the inner radius of the jacket. What is the mechanical significance of this constraint? Is there a derivation of the equation j = (2*(St^(2))/(P*Rj))-((.5)*(ts+tj)). Thank you in advance for any help in describing this concept to me.

RE: Jacket Space Width (ASME SECTION VIII DIVISION 1)

I'm not sure of the question, but I'll give you my interpretation;- for a given material, the limit of jacket space is function of the stress developed in the weld at the junction of closure and inner vessel and the stress at the weld of closure to the jacket wall. Obviously, increasing the jacket pressure, the jacket space will get smaller due to the need of proportional reduction of closure size, in order to keep constant the maximum allowable stress in the welds.
I hope my wording is not too confusing.
Cheers,
gr2vessels

RE: Jacket Space Width (ASME SECTION VIII DIVISION 1)

(OP)
Thank you, I understand it much more now. Is the weld stress a function of the inner surface area of the jacket and the outer surface area of the shell?

RE: Jacket Space Width (ASME SECTION VIII DIVISION 1)

It is the junction of the inner shell and the closure which could be overstressed due to pressure increase or junction space increase beyond the maximum calculated.
Cheers,
gr2vessels

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