×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

above ground painting systems for pipelines (Natural Gas)

above ground painting systems for pipelines (Natural Gas)

above ground painting systems for pipelines (Natural Gas)

(OP)
Hello guys, good morning

I hope you are well and had a great thanksgiving if you celebrated.

I have a question about if you have seen a table where you could check the different types of environmental and you could check what is the best system of painting for above ground painting? I remember that I saw something like this in API or ASME but I hope you could help me please with this.

Thank you so much, have a great day

RE: above ground painting systems for pipelines (Natural Gas)

Only ever seen this in company specification and standards.

What do you mean by "different types of environmental"?

Define "best" - cheapest?, longest lasting? easiest to apply? nicest colour?
Factory applied or site applied? surface preparation makes a big difference.
As does temperature of the pipe or the location.

Basically too many variables to have a simple chart.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: above ground painting systems for pipelines (Natural Gas)

(OP)
Maybe I saw a chart from my last company that was for example (no real):

System Number: 1 / Application: If the environmental is salty and humidity with temperatures of 80 Celsius / Surface preparation: Near white blast cleaning / Primer coat: Polyamine/ Intermediate coat: None / Finish coat: Polyamine epoxy 4 mils.

But I thought that was from ASME or API, maybe is from each painting company or maybe as you said company standards.

Thanks

RE: above ground painting systems for pipelines (Natural Gas)

Is there any relevant system other than surface prep to paint mfg spec, inorganic zinc primer topped with surface tolerant epoxy primer followed by an optional cosmetic coat?

RE: above ground painting systems for pipelines (Natural Gas)

I would love there to be an answer I can download and keep....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: above ground painting systems for pipelines (Natural Gas)

Is there no zinc rich polyamine epoxy primer available? Would it help?

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

RE: above ground painting systems for pipelines (Natural Gas)

Following up on TBEs comment
The charts that I have seen were end user specific.
They usually had three classes of service (arid with high UV, marine/coastal, all else).
They were all three layer systems with IOZ base.
The coating thickness, main coat, and top coat were slightly different based on service.
They tried to offer two options for each coating.
Sometimes there were special notes about 'extended sub-freezing service'.
I have seen technical papers where people compare different coating systems.
The problem is that often in one region you can't buy the same materials as in another.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: above ground painting systems for pipelines (Natural Gas)

You can refer to ISO 12944-5, protective paint systems. It has Tables listing various types of primers, paints and coating thicknesses for varying degrees of corrosion and environment protection.

RE: above ground painting systems for pipelines (Natural Gas)

They key is that IOZ and epoxy based systems are the most economical, best performing, and regulatory compliant (VOC) all in one package. Except for niche applications such as extreme cold and hot there really isn't a reason to deviate from this one system.

You may need other systems for repair or marginally prepared surfaces but this is for new construction, right?

As Ed alluded to, regional available is going to dictate the exact products used.

RE: above ground painting systems for pipelines (Natural Gas)

(OP)



Thanks to everyone, I found an image in Spanish that I used to use in Mexico in my old work, but I would like to found something in English.

I think that everything comes from ISO as BCD said.

Thanks

RE: above ground painting systems for pipelines (Natural Gas)

(OP)
I think that I never specified about where I would use this. This is for natural gas, carbon steel pipe above ground.

RE: above ground painting systems for pipelines (Natural Gas)

Be careful about specifying inorganic zinc primer. It is a superior primer, but only if used correctly. Field application is tricky, to the extent that it is seldom attempted, in my experience.

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

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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