Cleaning and Painting Transformer All surfaces of the transformer, tanks, covers, panels, etc., shall be thoroughly cleaned by de-greasing and abrasive blasting to remove grease, scale, rust, and corrosion. All surfaces shall then be given at least one (1) coat of rust-resistant primer. The exterior surface of the transformer tank, covers, metal barrier, and the interior and exterior of panels, etc., shall be given two (2) coats of finish enamel. Color ANSI No. – 61 Gray, low-gloss, Alkyd Resin Enamel. The total paint thickness shall not be less than 3 mils at any point. The interior of all control cabinets and the tank shall be painted white. All transformer finishes shall adhere to the latest version of the EEI Finishing Guidelines for Padmount Equipment. All manufacturers shall furnish certified test results demonstrating that their coating system and application method meets the following minimum test requirements: Salt Fog Resistance Per ASTM B117, 1500 hours. Crosshatch Adhesion Per ASTM D3359, tape removal per Method B. Humidity Per ASTM D2247, except at 45° C ± 1° C, there shall be no blisters. Impact Per ASTM D2794. OUV Exposure Accelerated Weather Test Exposure rate per ASTM G53; loss of gloss shall not exceed 50% as per ASTM D523. Abrasion Test Taber Abraser – Per ASTM D4060, coating shall survive at least 3,000 abrasion cycles. Oil Resistance As related to probable mineral oil contact. Immerse two (2) test panels in mineral oil for 72 hours, one at room temperature (20° C - 25° C) and one at 100° C - 105° C. There shall be no apparent changes such as color shift, blisters, loss of hardness, or streaking.
Cleaning and Painting Transformer All surfaces of the transformer, tanks, covers, panels, etc., shall be thoroughly cleaned by de-greasing and abrasive blasting to remove grease, scale, rust, and corrosion. All surfaces shall then be given at least one (1) coat of rust-resistant primer. The exterior surface of the transformer tank, covers, metal barrier, and the interior and exterior of panels, etc., shall be given two (2) coats of finish enamel. Color – ANSI No. 61 Gray, low-gloss, Alkyd Resin Enamel. The total paint thickness shall not be less than 3 mils at any point. The interior of all control cabinets and the tank shall be painted white. All transformer finishes shall adhere to the latest version of the EEI Finishing Guidelines for Padmount Equipment. All manufacturers shall furnish certified test results demonstrating that their coating system and application method meets the following minimum test requirements: Salt Fog Resistance Per ASTM B117, 1500 hours. Crosshatch Adhesion Per ASTM D3359, tape removal per Method B. Humidity Per ASTM D2247, except at 45° C ± 1° C, there shall be no blisters. Impact Per ASTM D2794. OUV Exposure Accelerated Weather Test Exposure rate per ASTM G53; loss of gloss shall not exceed 50% as per ASTM D523. Abrasion Test – Taber Abraser Per ASTM D4060, coating shall survive at least 3,000 abrasion cycles. Oil Resistance As related to probable mineral oil contact. Immerse two (2) test panels in mineral oil for 72 hours, one at room temperature (20° C - 25° C) and one at 100° C - 105° C. There shall be no apparent changes such as color shift, blisters, loss of hardness, or streaking.
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