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FRP Lining Procedure & Quality Control


Duracoat Lining Procedure & Quality Control :

1. Safety :


The tank to be lined should be thoroughly emptied and clean.



Vapor in the tank should be purged to reduce explosion and inhalation hazards.

2. Surface preparation :

-Concrete :

   Holes in the floor greater than an inch diameter are repaired by welding metal plates over them and patched by putty.


   Check the moisture contents with moisture meter, to make sure an ideal moisture 4% - 10% Max.





-Metal :


   The surface must be free of scale, oil and grease. Sand blast to near white color.


3. Prime the clean surface


   The metal and concrete surface are protected by brushing on a epoxy resin Duracoat-009-PD and Hardener Duracoat-40-H,


    to increase bonding strengthbetween FRP to metal and concrete.

4. Apply the laminate

    All areas to be lined with Glass Mat and Polyester or vinyl ester resin as specified.


    The standard of glass is E glass, that would be reinforcement layer.



'   The resin and glass are to be worked down with special grooved


    roller and brushes in order to minimize the  surface free of pin holes and air pockets.

5. Apply the Corrosion barrier


     After apply the laminate as reinforcement layer, surfacing veil as the corrosion barrier should be applied



    with polyester or vinyl ester as specified.

6. Spark Test


     Before applying the finish coat, all surface to be inspected to found any pin holes with spark test machine.



    Any pinholes detected and  found, would be repaired at this time.






7. Finish Coating & Hardnes Test

      Polyester and vinyl ester finishing coating would be brushed on the surface,


      mix the resin with wax additive and pigment color as specified.


      Make sure the hardness surface with barcol harnes test machine.