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

Pressure Vessel Designation

Pressure Vessel Designation

Pressure Vessel Designation

Hello, I'm trying to figure out as to why our main condenser and our dump condenser would have no designation as a pressure vessel as per PA inspection requirements. They're still vessels that CAN encounter pressure and they have an NBIC number accompanied by shell MAWP ratings in psig.

RE: Pressure Vessel Designation

mmchugh2, first, check your jurisdictional requirements (PA = Pennsylvania?). A given jurisdiction can exempt certain kinds of equipment.

Second, per ASME Sec VIII, Div 1, vessels can be exempted based on size and service. See U-1(c)(2), and especially U-1(c)(2)(f).

Are your condensers stamped? Could be they were NBIC registered even if not stamped.



RE: Pressure Vessel Designation

Mike, thanks for the reply. These vessels are NBIC stamped but PA also applies an identifying serial number to pressure vessels. My only information that I can collect is that they are exempt from the codes because under typical and optimum operation these vessels are seeing vacuum. Hoever, as not everything is always perfect and situations are never optimal, the shell supply (steam) lines are equipped with relief devices. PA requires that pressure vessels and associated safety valves are re-certified every three years. I hate having the "ah it's been this way for twenty years" attitude.

RE: Pressure Vessel Designation

What is their design pressure? How are they protected against overpressure?

RE: Pressure Vessel Designation

I believe that design pressure is your key here.

ASME VIII requires devices to be code stamped only when the MAWP is 15 psig or greater.

Your condensers probably have a MAWP that is much less...

Have you made a call to the original fabricator ?

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! Already a Member? Login


White Paper - PLM and ERP: Their Respective Roles in Modern Manufacturing
Leading manufacturers are aligning their people, processes, and tools from initial product ideation through to field service. They do so by providing access to product and enterprise data in the context of each person’s domain expertise. However, it can be complicated and costly to unite engineering with the factory and supply chain. Download Now
White Paper - Medical Device Design Control
Medical device product development is a highly integrated and regulated process. Implementation of a requirements tracking solution requires attention to a variety of nuanced topics. When presented with the task of tracking the many concept relationships in a project of this type, the initial software solution of choice tends to be a two-dimensional text systems. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close