×
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

Tank roof repair using BELZONA

Tank roof repair using BELZONA

Tank roof repair using BELZONA

(OP)
Dear colleagues,
Could someone tell me where can I find in API 650 or 653 about tank roof repair using cold work? (for example, BELZONA)

RE: Tank roof repair using BELZONA

You won't find that in API 650 (new tanks, not repairs) or 653 (which is all about permanent repairs).

RE: Tank roof repair using BELZONA

(OP)
@IFRs, thank you for your answer. :)
Do you know where I can find any normative recommendation for this type of repair?

RE: Tank roof repair using BELZONA

The only cold repair I've done was to cold cut holes and make bolt-on metal patch plates with gaskets and sealant. Temporary until a real repair could be done. Can you share more info?

RE: Tank roof repair using BELZONA

(OP)
@IRFs,
I am studying an issue for my client,

The issue:
My client owns hundreds (literally) of API 650 vertical storage tanks at various fuel terminals nation-wide (not USA!).

I need to make several step-by-step procedures (according to API) to standarize the maintenance of these tanks. They want one for cold repair using belzona in their roofs (as premise, they are all fixed conical-roof).

But I didn't find any API standard that allows this nature of repair, but I know that a lot of companies do this type of service.

The best refference I found is this attached file:

RE: Tank roof repair using BELZONA

Dear jrafael95 (Mechanical

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


Good Luck..

RE: Tank roof repair using BELZONA

Will you limit the hole size you going to allow to be patched?
At what point to you say patching is not OK?
Will you patch in service?
How will you know that the rest of the roof is safe to walk on, and for how long?
Do you need to restrict the tank's use after making a soft patch, for instance:
can it be walked on for normal operations ( gauging, inspection, etc )
will it be good for all normal loads ( wind, snow, etc )
will it be good for all operational loads ( pressure and vacuum )
will it be good for emergency conditions such as fire in a nearby tank
what time frame will it be good for
how will future inspections be done

RE: Tank roof repair using BELZONA

(OP)
@HTURKAK:
Thanks for the answer! I will get this API RP right now :)

@IFRs:
Thanks for the answer too :)

Will you limit the hole size you going to allow to be patched?
My client didn't say anything about this,so , at this first moment, I'll recommend this type of repair for holes that do not affect the strenght of the roof.

At what point to you say patching is not OK?
Honestly, I need to study more about this type of repair before giving a technical opinion

Will you patch in service?
Yes.

Do you need to restrict the tank's use after making a soft patch, for instance
No.

My client has it's own inspection program and I don't have any info about how they would inspect a tank with it's roof repaired with belzona.

RE: Tank roof repair using BELZONA

Well your client is going for a very unsafe and unscientific practice.

Unsafe as the personnel applying belzona (or other people who would later visit the tank roof) are at risk as the perforated roof plates need to be replaced.

Unscientific as the hydro-carbon vapours could eat away the belzona in days or months which is not properly known.

These are nothing but cost cutting measures in uncertain times. Try to stay away from such non-sense.

DHURJATI SEN
Kolkata, India

RE: Tank roof repair using BELZONA

(OP)
@Dhujarti Sen, thanks for your answer.

I'm worried about this practice too. I'll have a meeting with my client and I'll alert him about this practice.

If you have some good info about this, could you send to me?


RE: Tank roof repair using BELZONA

Google the following:

Durapol UHT

http://www.sealtec.co.il/index.asp

They are experts and you may contact them.

Application of Belzona 1391 was tried in a plant in the middle east, but it did not last for long.

Standard Disclaimer: I am in no way connected to M/s Sealtec and strongly believe that complete or partial replacement of the perforated roof is the most appropriate solution.

DHURJATI SEN
Kolkata, India

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


Resources

White Paper - Strategies to Secure Connected Cars with Firewalls
White-hat hackers have demonstrated gaining remote access to dashboard functions and transmissions of connected vehicles. That makes a firewall a vital component of a multilayered approach to vehicle security as well as overall vehicle safety and reliability. Learn strategies to secure with firewalls. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - What is Generative Design and Why Do You Need It?
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
eBook - Simulation-Driven Design with SOLIDWORKS
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, we’ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. Download Now

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