×
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

ASME B31.3 Skid design / fabricating

ASME B31.3 Skid design / fabricating

ASME B31.3 Skid design / fabricating

(OP)
We normally design gas processing skids under PED. However for this American project we have to work under ASME B31.3 and I want to verify a few things.

-This system falls under normal fluid service.
-We will source U-stamped pressure vessels and integrate those into the skids as our skid fabricator does not have a CoA.
-Max pressure: 290 psig, AISI 304, 300# flanges, max pipe size is 6".

1.) Is a NoBO required for design validation (assembly integration validation), PID validation?
2.) Is a flexibility calculation required? To my understanding this is not needed if T is below 150 °F.
3.) To my understanding the Client has to send an inspector to inspect the piping, correct?
4.) 100% VT and 5% RT of welds required.
5.) Are there any other requirements we need to be aware of when commissioning the skid on site?

Thanks!

RE: ASME B31.3 Skid design / fabricating

Check with the exact jurisdiction of this installation, as things could change state to state, county to county, city to city. But, in general:

1 - no
2 - it must be "considered". This could mean a one sentence explanation or an exhaustive analysis and report, but if no one is checking and the risk is nil....
3 - it is not mandatory and rarely happens until turnover to the client.
4 - as a minimum, yes.
5a - check with your client. Different industries have different levels of regulatory oversight. A "process safety analysis" (PSA) of the P&IDs is commonplace in my industry.
5b - if you are offering or providing any engineering services to a client outside of your company, the work must be done under the "responsible charge" of a licensed professional engineer registered in the state(s) involved. In most states your company must also be registered.

In most places it is the "Wild West" but there a few places (California comes to mind) where the bureaucrat class has taken root.

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