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


Pitting on 5%Cr tubes

Pitting on 5%Cr tubes

Pitting on 5%Cr tubes

what is the reason behind the occurrence of pitting corrosion on the outside surface of tubes (material 5% Cr) for heat exchanger that connected to bottom of naphtha stabilizer column in crude distillation unite?

RE: Pitting on 5%Cr tubes

Total shot in the dark without looking at the process would be that you're getting poor separation in the crude overhead drum and are carrying water and chlorides into the stabilizer column, which is boiling dry in exchanger.

Would take a sample of the feed and see if it's cloudy (emulsified water), or if a separate phase will settle out...

Nathan Brink

RE: Pitting on 5%Cr tubes

What fluids are on the shell side of the exchanger?

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