Contact US

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!

*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

API tank supported cone roof repair

API tank supported cone roof repair

API tank supported cone roof repair

I found this thread (https://www.eng-tips.com/viewthread.cfm?qid=477970), but little else that answers my question.

I have a tank that has a few small holes in it and some thin areas. API 653 hardly gives any guidance on repairs for roofs, so we tend to just patch them with patch plates that are OEM thickness with 2" radius corners. We call this a permanent repair since the roof doesn't hold pressure.

These few small holes are not enough to merit replacing a whole roof section. Let me know what you think.

NDE recommendation: VT Prep, PT Root/Final, Vacuum test roof patches

RE: API tank supported cone roof repair

I preferred to copy and paste my previous repond to the thread Tank roof repair using BELZONA
thread1452-467276: Tank roof repair using BELZONA


API 650,620,2000.. are Construction Standards.
API 653,510,570 ..Inspection standards.
You shall look to Recommended Practices (RP). Regarding the roof repair,

API RECOMMENDED PRACTICE 575 10.3 Special Repair Methods states:
'Leaks in roofs can be repaired by soft patches that do not involve cutting, welding, riveting, or bolting of the steel. Soft patches can be made from a variety of materials, including rubber, neoprene, glass cloth, asphalt, and mastic or epoxy sealing materials; the choice depends on the contents of the tank and the service conditions. The patching is applied in much the same manner as similar patching would be applied to the roof of a building. The patches may be applied when the tank is in service, if proper safety practices are followed. Figure 67 and Figure 68 show a patch and a complete coating, respectively.'

NEW ENGLAND MAXIM Quote 'Use it up, wear it out; Make it do, or do without. '

Good Luck
Why not BELZONA??

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! Already a Member? Login


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