×
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

Pipe size range for ASME B31.3

Pipe size range for ASME B31.3

Pipe size range for ASME B31.3

(OP)
What is the largest pipe size for which B31.3 applies?

RE: Pipe size range for ASME B31.3

I do not have access to the latest edition but I have seen 72" NPS in the past.
What size do you have on your project?

prognosis: Lead or Lag

RE: Pipe size range for ASME B31.3

Holy Geez penn...that is some massive "process piping".
Wow..

RE: Pipe size range for ASME B31.3

There is no real limit imposed by B31.3. I've directed repairs to refinery piping up to 60" at refineries and I have seen larger. I can vouch for the 72" size indicated by pennpiper.

RE: Pipe size range for ASME B31.3

Our fabrication shop built some gas ducting just this year for the sulfuric acid industry that was 80"ID per B31.3. It was for low pressure (~45psi) gas service, and included 5" thick refractory on the inside surface.

You'll often find this really big B31.3 piping on furnace discharge piping, where you have a large volume of low-density gas and pressure drop is at a premium because the whole system is driven by a fan of some sort.

Cheers,
Marty

RE: Pipe size range for ASME B31.3

I have personally designed a vacuum transfer line that was 144" ID x 120' long. So, there is no defined limit in the Code itself.

RE: Pipe size range for ASME B31.3

At some stage, dont you require a very thick wal to satisfactie the D/T ratio requirements? Or am I mixing things up and does that only have to do with pipe stress analysis, and branch calcs?

RE: Pipe size range for ASME B31.3

The only limits with respect to D/t are that the Appendix D formulae provide values for k and i. Outside of those limits, analysis is permitted, but there are no codified values.

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