Polyurethane vs FRP 2

[Joss10]

Dear mates,
My contractor is offering me Polyurethane instead of FRP to coat a Crude Oil TK bottom, cost is half.
Any input will be apreciated.

 

[EdStainless]

What advantages (besides price) is he touting?
IF you need strength then FRP has big advantages.
Either way the adhesion is the primary issue, make sure that you know what combination of surface prep and base coats are being used to assure proper adhesion.

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P.E. Metallurgy, Plymouth Tube

 

[moltenmetal]

The coatings aren't even close to being equivalent. Which one do you need? I have no idea, but I'm pretty sure there is some API and/or NACE guidance available on the topic if you do some research.

 

[SJones]

https://www.corrosionpedia.com/2/17...erations-when-selecting-internal-tank-linings

http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=58037&commid=49506

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.

 

[CoCoE]

Dear Joss10,

FRP is indeed a heavy duty coating. High build PU is very much abrasion resistant too.

So I would suggest if your Crude oil property is good for PU, then go for it!!

CocoE

 

[HiDrPo]

Who's on the hook if the poly doesn't work?

 

[Andrew1974]

I would not use a polyurethane in this situation. I would recommend a Cyclo-Aliphatic Epoxy. They're designed for immersion in these situations. Polyurethanes are generally used for UV protection, gloss retention, etc.

 

[Andrew1974]

I've done work with Internal Tank Linings, floating roofs, etc and here's what I used when I worked at Chevron in Pascagoula, MS.

http://gulfcoastpaint.com/wp-content/uploads/2015/11/PC-517-Super-Mastic-Brochure.pdf

Gulf Coast Paint PC-517 Cycloaliphatic Epoxy