Welcome to the aboveground storage tank forum, a bulletin board dedicated
to tanks, fuel tanks, plastic tanks, fuel storage tanks, and above ground storage
tanks (AST) API650, API653 & UL142
aboveground storage tanks (AST) and chemical plastic tanks. Remember the forum
is made up of volunteers from experts to beginners. Unfortunately, we cannot allow free commercialism that promotes products, services, or sites.
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lining failure - Friday, March 09, 2012 - MIROSLAV [879]
some of our tanks API 12B have Plastic lining fiberglass reinforced and implemented under the guidelines of API 652. one of the tanks that have this lining, applied 10 years ago, was inspected recently and managed to find some discontinuities in the glass fiber reinforced, as shown in the attached image. please if anyone has experience with this type of lining and if you can comentarme about the deterioration suffered and whether failures were similar to the image. would be nice if they also experience in repair procedures of this lining. regards
Click on picture for full size view or to view PDF!
This is on my list of reasons I dont like to use fiberglass coatings and why I remove them and apply epoxy coatings. If you were to repair these, I think you would need to cut back the fiberglass until you found some that was properly adheard to the tank floor and then do your surface prep of the steel and surrounding fiberglass coating and lay up a new patch.
Will patching this spot fix your problem? I dont know. It might fail again. The coating might fail somewhere else. Also, you cant very well inspect the condition of the steel floor through a fiberglass lining. Which is also on my list of reasons I dont use fiberglass coatings. Along with the fumes and hazards associated with applying the coating.
I agree with the above comments on the fiber re-enforced lining repair. It is just a matter of cutting back the damaged area, solvent cleaning to remove contaminants, apply putty to smooth the edges and then apply the resin and mat to complete the repair. After hardness is achieved, a gel coat of wax solution should be applied followed by a holiday test. Make sure to feather the wax coat on the remainder of the patch area so that the repair may be tied in to the remainder of the floor.
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ETANK2000: The #1 CAE tool for aboveground storage tank design / re-rating / inspection evaluation to API-650, API-620, API-653, & UL-142
AMETank (comming soon): All of the ETANK2000 engineering / code calculations plus Bill of Materials, Fabrication Drawings, and (soon) Estimating.
4611 Broad River Road, Suite I
Forum 
some of our tanks API 12B have Plastic lining fiberglass reinforced and implemented under the guidelines of API 652. one of the tanks that have this lining, applied 10 years ago, was inspected recently and managed to find some discontinuities in the glass fiber reinforced, as shown in the attached image. please if anyone has experience with this type of lining and if you can comentarme about the deterioration suffered and whether failures were similar to the image. would be nice if they also experience in repair procedures of this lining. regardsPost a Reply....jpg)
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This is on my list of reasons I dont like to use fiberglass coatings and why I remove them and apply epoxy coatings. If you were to repair these, I think you would need to cut back the fiberglass until you found some that was properly adheard to the tank floor and then do your surface prep of the steel and surrounding fiberglass coating and lay up a new patch.
Industrial Training School and AIS Forensic Testing Laboratory.
