×
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

What is the best method calculation for corrosion allowance in storage tank (water)?

What is the best method calculation for corrosion allowance in storage tank (water)?

What is the best method calculation for corrosion allowance in storage tank (water)?

(OP)
What is the best method calculation for corrosion allowance in storage tank (water)?

thanks for the help.

RE: What is the best method calculation for corrosion allowance in storage tank (water)?

Corrosion allowance is not something you calculate. It all depends on you process medium, your material of construction, your temperature, and industry experience with these conditions. Provide these and we'll be able to assist.
It's not a calculation but sort of a rule of thumb.

RE: What is the best method calculation for corrosion allowance in storage tank (water)?

Start with looking at the difference between the minimum retirement thickness and the minimum thickness of the tank plate for construction so that you don't add steel on unnecessarily. Some standards give you a minimum corrosion allowance and you will have to make a call on whether that is sufficient based on expected corrosion rate and the corrosion control measures such as lining and cathodic protection. EEMUA 183 points out issues of low cycle fatigue in the annular section and recommends keeping it as thin as possible, suggesting a maximum corrosion allowance of 2mm for plate not exceeding 12.5 mm, and 1mm for thicker plate. Also, bear in mind that the usual corrosion morphology is pitting for which increased corrosion allowance doesn't offer a reliable barrier.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

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