×
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

Rerate HX

Rerate HX

Rerate HX

(OP)
An old Shell and tube HX built and designed per TEMA back in 1968 needs to be rerated for new temperature and pressure. Any guidelines on how to proceed will be really appreciated. Does TEMA have any guidelines on how to rerate an existing TEMA HX? I presume ASME Section VIII Div 1 UHX will have nothing to do with this problem since this is about rerating an HX and not a new HX.

RE: Rerate HX

picasa,
The National Board Inspection Code will, more than likely, be your governing document.  You would be well advised to check with your local jurisdiction.
Regards,
RLS

RE: Rerate HX

lostsailor is correct if your Jurisdiction or your insurer is involved. The applicable section in the National Board Inspection Code (NBIC) is Part RC-3000, and involves re-rating of pressure retaining items, which is considered an alteration.

RE: Rerate HX

Save yourself some headaches and just do some preliminary calcs to make sure your desired conditions are reasonable for the exchanger.  Then get a quote from an exchanger vendor that you currently work with to provide: eng. calcs, new nameplate/bracket, misc. paper work, etc.  This can usually be provided at a very reasonable cost.  You will need to provide them with drawings and recent inspection records.

In most cases your own personnel can weld the new bracket in place with the AI (Authorized Inspector) witnessing it. Hydro and other tests required may depend on the AI.(Inspector can possibly be provided by the Vendor depending on local rules)

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