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


Inspection of Finned Tubes

Inspection of Finned Tubes

Inspection of Finned Tubes


We are operating a heating coil downstream of a primary reformer (furnace) at an ammonia plant with tube dia of 48 mm. The flue gases of the furnace are being used for steam generation from Boiler Feed Water inside the tubes. The tubes are finned externally on the entire exposed length.

Can anyone share their experience on external inspection of finned tubes for symptoms related to overheating and consequent life assessment?


RE: Inspection of Finned Tubes

External inspection can be evaluation of the fin profile and spacing. If tube swelling from creep is occurring, this can be an indicator. Other than actual tube samples, you can try remote field eddy current testing to evaluate tube wall loss or borescope inspection of the tube ID surfaces to check for oxide spalling or blistering.

RE: Inspection of Finned Tubes

Inspengrmm, What is the material and tube thickness?
What symptoms do you expect from overheating of these tubes?

RE: Inspection of Finned Tubes

For overheating, take a sample of the fins that you suspect that are overheated and make a metallographic analysis, maybe it will be worthwhile. For assessment of remaining life, you should also consider, if possible, to install in the more susceptible fins, skin thermocouples.

regards LM

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!


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