Coating 1

[OKCorall]

Hi all,

What coating would be used for field girth weld for a 16" pipeline, design temperature of 85C, coated with a dual-layer fusion bond epoxy. Shrink sleeve, epoxy kit?

Thank you very much.

 

[DLite30]

3M scotchkote 323.

http://solutions.3m.com/wps/portal/...1R40I49E2FVI20E3_nid=DDNRJGRC0Qbe9D93Z6GW3Dgl

 

[BigInch]

Other options might include,

http://www.premcoatings.com/Products/Premier-Coatings-Heat-Shrink-Sleeves.aspx

Let your acquaintances be many, but your advisors one in a thousand’ ... Book of Ecclesiasticus

 

[OKCorall]

Thank you for you replies. What would be best for such a situation? Shrink sleeve or liquid epoxy?

 

[BigInch]

I like shrinks, but your guys have to be smart enough to put them on first. Maybe you wanna' have some of both on hand, if you know what I mean.

Let your acquaintances be many, but your advisors one in a thousand’ ... Book of Ecclesiasticus

 

[SJones]

You can review DNV-RP-F102 for the range of selection of field joint coatings (you don't say onshore or offshore)

http://exchange.dnv.com/publishing/Codes/download.asp?url=2011-05/rp-f102.pdf

although it won't tell you which ones to select for dual layer FBE factory coating. Apparently, field application of the same dual layer FBE coating is not under consideration; perhaps it should be?

Whatever you choose, make sure that it first has been laboratory qualified by the manufacturer and has a track record and then make sure that you qualify the field application procedure and the personnel in a yard before letting them loose on the spread or the back of the barge.

Steve Jones
Materials & Corrosion Engineer

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

 

[OKCorall]

Thank you all. A STAR for SJones for his detailed reply.

 

[auzie5]

If you do elect to use a coating rather than a sleeve for your girth welds, you may want to consider using a grout first to smooth out any holidays in the weld area prior to applying an epoxy protective top coat. For example, the designer of a mainline externally coated with Devran 224 HS epoxy coating could stipulate the following two part joint coating kit:

•Enviroline 124 Epoxy Grout Coating Kit followed by Devoe Bar-Rust 235 Epoxy Coating Kit

The coatings referenced in the above example have maximum operating temperatures > 85C.

 

[DLite30]

I can tell you, that we have outlawed the use of shrink sleeves for permanent installations...above or below ground.

 

[OKCorall]

"DLiteE30 (Mechanical)
27 Jun 11 17:58
I can tell you, that we have outlawed the use of shrink sleeves for permanent installations...above or below ground."

DLiteE30

I am wondering in what part of the world this has happened and why?

Thanks,

OKCorall

 

[DLite30]

"We" being, my company, and "law", being our standards...

not really a regulation or law.

 

[BigInch]

Talks like only a state petroleum company can talk.

Let your acquaintances be many, but your advisors one in a thousand’ ... Book of Ecclesiasticus

 

[SJones]

If sleeves are outlawed what formed the posse?

Steve Jones
Materials & Corrosion Engineer

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

 

[BigInch]

Sleeves are a victimless crime. Its sparks that should be arrested.

Let your acquaintances be many, but your advisors one in a thousand’ ... Book of Ecclesiasticus

 

[DLite30]

We'll hang 'em from the rafters, we will.

 

[rovineye]

The sale os Scotchkote has been halted in about 10 states due to issues with the VOC content, as of June 1, 2011. Bummer.