Carboguard 695 CLR Clear Epoxy Reinforced Lining System Application Instructions Pictorial

Transcription

1 Carboguard 695 CLR Clear Epoxy Reinforced Lining System Application Instructions Pictorial The American Petroleum Institute (API) set forth guidelines for the repair/refurbishment of old tank bottoms used to store petroleum products. Recommended Practice (RP652) details the use of an epoxy reinforced lining for these older tanks. Carboguard 695 CLR was formulated to satisfy the requirements of API RP652. The application of this clear epoxy reinforced lining system utilizes a fiberglass chopped strand mat (CSM) for internal reinforcement, and a putty material to handle transition areas around rivets, lap welded plates, chine areas, etc. The system consists of holding primer (following the abrasive blasting procedure), the treatment of the chine area, lap welds, rivets, protrusions, etc, by the putty material, a gel coat of 695 CLR which has a fiberglass inlay, followed by another coat of 695 CLR to sandwich the CSM, and a final gel coat of 695 CLR or Phenoline 341 (pigmented) to seal the entire system and ensure there are no mesh hairs protruding through the surface. System SSPC SP10 Near white metal cleaning (3-4 mil profile) Phenoline 311 (holding 2-3 mils dft (optional) Carboguard 695 PM putty material applied to selected areas Carboguard mils neat resin Fiberglass Chopped Strand Mat (CSM) (0.75 to 1.50 oz/ft 2 ) inlay (use metal rollers to imbed) o Acceptable manufacturer: M127 Chopped strand mat from St. Gobain ( ) Carboguard mils neat resin (sand any loose mesh hairs ) Phenoline 341 (or other) final gel mils Surface Preparation The application starts with the cleaning of the tank s residual cargo followed by an abrasive blasting operation to remove corrosion products. Typical riveted/lap weld construction (abrasive blasted to SP10 with 3-4 mil profile) Repair plate welded to tank floor

2 Surface Preparation Details Special procedures Heavily pitted areas blast cleaned Severe pitting may require puddle welding, plate repairs, and/or filling in with epoxy resin. Striker plate under column Blasting completed (blasting up 24 inches onto side wall); vacuuming procedure

3 Preparing for Coating Application Vacuuming the floor Deep pitting requiring puddle welding or plate repair Holding primer application Phenoline 311 (applied at 2-3 mils dft) or other suitable holding primer is to be applied (as needed) to hold the blast to prevent rust-back prior to treatment of details requiring putty and coating application.

4 Carboguard 695 PM (putty) - Chine Details Any lap weld areas, rivets, protrusions, chine areas or other areas requiring a smooth transition shall be treated using a Carboguard 695 PM, a putty or patching material. This material comes as a pre-packaged kit that is mixed at the job site and applied using trowels and/or brushes. Chine area requiring chamfer Carboguard 695 PM putty application in chine area Final photo of chamfer detail using Carboguard 695 PM putty

5 Bottom Weld Seams Putty Application Putty application on weld seams Ridges in putty application will require sanding or a skim coat to smooth over prior to applying fiberglass CSM (to allow it to lie down properly)

6 Fiberglass CSM Application Chine Area Skim coat of epoxy over pitted steel bottom to ready the floor for the clear coat and CSM application Saturating fiberglass with Carboguard 695 mils using ½ to ¾ roller naps Rolling saturated fiberglass CSM with metal rollers to remove air and install tight to substrate. Completed chine area, prior to floor application

7 Carboguard 695 CLR Application Weld Seams Fiberglass CSM being saturated with ¾ roller naps. The two pieces of fiberglass are overlapped 3. The floor must first be coated with the Carboguard 695 CLR resin prior to the CSM being laid on the floor. This ensures complete saturation and bonding to the primed floor. The metal rollers also help in this process. Carboguard 695 CLR saturant coat being rolled with metal fiberglass rollers to remove all air bubbles and ensure the fiberglass is fully saturated with resin. All adjacent pieces of fiberglass are over-lapped 3 and the edge of the over-lap is rolled tight. Completed horizontal seams

8 Bottom Installation Carboguard 695 CLR with Fiberglass CSM Fiberglass CSM installed on floor and overlapping in the chine area of tank Fiberglass at pipe support legs being cut to fit Carboguard 695 CLR saturant coat being applied to the fiberglass CSM with a ¾ roller nap to the field of the floor plates with 3 overlaps on all adjacent previously installed fiberglass. Carboguard 696 CLR saturant coat and fiberglass being rolled with metal rollers to remove air and ensure the fiberglass is tight to the floor and adjacent fiberglass previously installed