×
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

False floor replacement for corroded API 650 tank base plate

False floor replacement for corroded API 650 tank base plate

False floor replacement for corroded API 650 tank base plate

(OP)
An existing tank has a base plate which has corroded to the point where the product is leaking into the soil underneath. Due to enviromental issues, we need to replace this base by raising the floor (for ispection) by means of ribs / webs. API 650 does give equations to calculate the distance between these webs, and the thickness of the new base plate.
Can anyone tell me how to size the flat bars supporting this base & also how to check for buckling of these webs?

RE: False floor replacement for corroded API 650 tank base plate

The system of support beams should be checked for lateral load resistance (for wind and earthquake forces) as well as web crippling due to vertical compression of the web.  The procedure for web crippling should forllow AISC procedures.  For wind and earthquake loads it will  be too complicated to go thru here.

Steve Braune
Tank Industry Consultants
www.tankindustry.com

RE: False floor replacement for corroded API 650 tank base plate

david,

As I recall, many leaking flat-bottomed tanks are repaired by constructing a second bottom above the first.

The space between the two bottoms is filled with sand and is monitiored for leakage. Wouldn't this be a better solution for your tank ?

Can you tell us more details about your particular application ?

MJC

  

RE: False floor replacement for corroded API 650 tank base plate

(OP)
The client had asked for this configuration. I think they even explored the option of a concrete florr on top of the corroded base, but because of expansion issues and the clearance between the concrete and the shell, they opted for the above mentioned config.

ThanksMJC...

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