×
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

Maximum Thickness of Pressure Vessel?

Maximum Thickness of Pressure Vessel?

Maximum Thickness of Pressure Vessel?

(OP)
Colleagues;

Is there a maximum thickness a vessel head/shell can be under the rules of ASME Section VIII, Div.1?  If so, is it further limited by material selection (ie; P1 may be thicker than P8)?

I don't know why, but I am under the impression that 8" is the maximum permitted for butt welding (forged vessels may be different) and you would have to consider going to a Div.2 or Div.3 design beyond that.

If anyone has a code paragraph to steer me towards will be appreciated.

 

RE: Maximum Thickness of Pressure Vessel?

(OP)
Never mind, I figured it out, although my answer is not entirely reflective of my original post.  Here it is for anyone who was interested in this...

I have worked primarily with carbon steel and SA-516-70.  Section II, Part A, SA-516, paragraph 1.3 limits this steel thickness to 8".  This is the number that was stuck in my mind.

RE: Maximum Thickness of Pressure Vessel?

Just something else to consider - qualifying welding procedures per ASME IX, a 1.5"-6" thick PQR (1.5" being the norm) will only qualify you up to 8 inches in thickness.  Beyond 6 inches, your PQR is qualified to 1.33T, and material availability and cost becomes substantial.  Typically, one would have to have spare material ordered at the same time as the vessel components are ordered from the mill/supplier.

RE: Maximum Thickness of Pressure Vessel?

I would consider going to division 2 around 2" thick.

We like to save money on material and labor to put that material together.  Just a little more NDE stuff, but doing it anyway.

And engineering is cheap!

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