Smart questions
Smart answers
Smart people
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login




Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • 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!

Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Donate Today!

Do you enjoy these
technical forums?
Donate Today! Click Here

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

Kungkmutt (Mechanical)
2 Mar 12 4:13
Regarding the tank covered with insulation, The service is hydrocabon that service temperature is around 60C to 80C. I found corrosion underside/ leaking through bottom plate during tank shutdown.The corrosion was created from underside because the topside steel surface quite smooth and there was no scale, no significant metal loss (MFL evaluation). The tank is on concrete ring wall with sand cushion wiht leak detection.
Can anyone stimulate the situatuion of underside corrosion occurrence incase the CP is still active?  
KnaT (Mechanical)
12 Mar 12 1:52
There can be several reasons depending upon the site conditions and tank design.

A probable cause might be the failure of bottom underneath coating.
Kungkmutt (Mechanical)
19 Mar 12 22:07
Thank you KnaT for kind advice. Is coating of bottom underneath required normally? Do it affect CP?  
chicopee (Mechanical)
19 Mar 12 22:52
I have been involved with a bottom leak of an AST made by a food can that had been left by one worker when the tank was erected.  It took a couple of decades to notice the leak has it traveled underground and reached the basement of a home downhill from the tank.  The impression where the corrosion occured was perfectly circular.  

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