×
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

Set on nozzles in ASME VIII

Set on nozzles in ASME VIII

Set on nozzles in ASME VIII

(OP)
Please can anyone tell me if there is a limit to the maximum size of set-on nozzle you are allowed on to a vessel shell?
We need to put a 4" nozzle onto the shell of a heat exchanger and would find a set on preferable to a set through.
I've had a look but cannot find anything defining a limit - however I am not an experienced user of ASME VIII.  If you could mention the relevant section it would be a help.

I know that API 650 sets limits on set on nozzles, so I am assuming ASME VIII might also.

Thanks

RE: Set on nozzles in ASME VIII

There is no specific limitation on the set-on nozzles size per ASME VIII. And that applies for all pressure vessels, including heat exchangers, air coolers, etc. API 650 is the steel storage tanks standard, not for pressure equipment.
Cheers,
gr2vessels

RE: Set on nozzles in ASME VIII

(OP)
Thanks gr2vessels.
So the reason I couldn't find a limit is that there isn't one!
It's really helpful to get a quick answer instead of trawling through the standard looking for an answer.

Cheers
      John

thinking slightly philosophically: if you are looking for something in a standard and don't find it - can you assume it isn't there?  Perhaps you just haven't found it yet?   

RE: Set on nozzles in ASME VIII

That said, many end users do implement there own limit in their specifications.  I've seen specs that mandated Set-on nozzles be limited to 2", some that limit it to 4" and some that don't have a limit.

 

RE: Set on nozzles in ASME VIII

And some that don't allow them at all.

RE: Set on nozzles in ASME VIII

I think the API-650 restriction just reflects how things are normally done.  API tanks always have access from both inside and out, so there's not a lot of motivation to do it from one side only.  Note that hot-taps per API-653 use larger nozzles of different style than shown in API-650.

RE: Set on nozzles in ASME VIII

Reference to ASME DIV. 1 PAGE 130-134, FIG US-16.1, SEE NOTES

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