Electric utility coating selection guide: Transmission Towers & Poles and Substation Structures
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Product table for each of the different substrates that need painting in the T&D Market
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Electric utility coating selection guide: Transmission Towers & Poles and Substation Structures
- 1. Induron Protective Coatings Electric Utility Coating System Selection Guide Transmission Towers and Poles and Substation Structures Substrate Condition Environmental Surface Coatings Number Film Ranking Ranking Preparation Number of coats Thickness Name (per (mils DFT coat) A Weathered R-‐1, R-‐2 Mild to SSPC-‐SP2 Induraguard 1 8.0-‐10.0 Galvanized Moderate #9200 Structures C-‐1 to C-‐3 B Weathered R-‐3 Moderate to SSPC-‐SP2, Spot Prime Spot or 1 2.5-‐4.0 Galvanized Severe SSPC-‐SP3 P30 Primer Full Structures C-‐3 to C-‐4 (or) Prime Armorlux 8.0-‐10.0 Primer 1 Induraguard #9200 C Weathered R-‐3 to R-‐4 Moderate to SSPC-‐SP2, E-‐Bond 1 full 1.0-‐2.0 Galvanized Severe SSPC-‐SP3 Penetrating prime Structures C-‐3 to C-‐5m Sealer Induraguard 8.0-‐12.0 #9200 1 Weathered R-‐2 to R-‐4 Severe SSPC-‐SP-‐3 E-‐Bond 1 1.0-‐2.0 Galvanized Chemical or Induramastic 1 4.0-‐6.0 Structures Exposures SSPC-‐SP-‐11 Induramastic 1 4.0-‐6.0 C-‐5i Aluminum D Carbon R-‐1 to R-‐2 Mild to SSPC-‐SP2 E-‐Bond 1 spot o r 1.0-‐2.0 Steel Moderate Indurasil full Structures C-‐1 to C-‐3 Enamal Prime (Poles) Indurasil Enamel 1 2.5-‐4.2 Or Aquanaut II 2 2.0-‐3.0 E Carbon R-‐3 to R-‐4 Moderate to SSPC-‐SP3 E-‐Bond 1 1.0-‐2.0 Steel Severe Or Structures C-‐3 to C-‐5m SSPC-‐SP11 (Poles) Induramastic 4.0-‐6.0 Aluminum 1
- 2. Induron Protective Coatings Electric Utility Coating System Selection Guide Substation Equipment including Circuit Breakers, Switchgear Enclosures, Transformer and Regulator Bodies, Misc. Boxes. Surface Condition Environmental Surface Coatings Number Name Number Film Ranking Ranking Preparation of coats Thickness (per (mils DFT coat) A Previously R-‐1, R-‐2 Mild to SSPC-‐SP2 Spot Prime -‐ P30 Primer 1 2.5-‐4.0 painted, Moderate Full Intermediate – P30 Primer 1 2.5-‐4.0 Light rust C-‐1 to C-‐3 Full Finish -‐ Indurasil Enamel 1 1.5-‐2.5 B Previously R-‐3 Moderate to SSPC-‐SP2, Full Prime -‐ P30 Primer 1 2.5-‐4.0 Painted Severe SSPC-‐SP3 Full Intermediate – P30 Primer 1 2.5-‐4.0 Moderate C-‐3 to C-‐4 Full Finish – Indurasil Enamel 1 1.5-‐2.5 Rust C Unpainted R-‐4 to R-‐5 Moderate to SSPC-‐SP3, Full Prime – E-‐Bond Penetrating 1 1.0-‐2.0 or Severe SSPC-‐SP6 Sealer previously C-‐3 to C-‐5m or Full Intermediate – Induramastic 1 5.0-‐8.0 Painted SSPC-‐SP7 Aluminum Heavy Rust Full Finish – Indurathane 6600 1 2.0-‐3.0
- 3. Substation Equipment -‐ Transformer and Regulator Cooling Fins ( flo-‐coat only ) Surface Condition Environmental Surface Coatings Number Name Number Film Ranking Ranking Preparation of coats Thickness (per (mils DFT coat) A Previously R-‐1, R-‐2 Mild to SSPC-‐SP2 Full Intermediate – P30 Primer 1 2.5-‐4.0 painted, Moderate Full Finish -‐ Indurasil Enamel 1 1.5-‐2.5 no or light C-‐1 to C-‐3 rust B Previously R-‐3 Moderate SSPC-‐SP2, Spot Prime -‐ P30 Primer (spray or 1 2.5-‐4.0 Painted C-‐3 to C-‐4 SSPC-‐SP3 brush 1 2.5-‐4.0 Moderate Full Intermediate – P30 Primer 1 1.5-‐2.5 Rust Full Finish – Indurasil Enamel C Previously R-‐4 to R-‐5 Moderate to SSPC-‐SP3, Full Prime -‐ P30 Primer 1 2.5-‐4.0 Painted Severe SSPC-‐SP6 Full Intermediate – P30 Primer 1 2.5-‐4.0 Heavy Rust C-‐3 to C-‐5m or Full Finish – Indurasil Enamel 1 1.5-‐2.5 SSPC-‐SP7
- 4. Induron Protective Coatings Electric Utility Coating System Selection Guide Transmission Towers and Poles Buried Footers Guide Substrate Condition Environmental Surface Coatings Number Film Ranking Ranking Preparation Number Name of coats Thickness (per (mils DFT coat) A Weathered R-‐1, R-‐2, R-‐3 Mild to Severe SSPC-‐SP2 Induratar M.C. 1 5.0-‐7.0 Galvanized C-‐1 to C-‐5 SSPC-‐SP3 Structures B Weathered R-‐4, R-‐5 Mild to Severe SSPC-‐SP3, Induratar M.C. 2 5.0-‐7.0 Galvanized C-‐1 to C-‐5 SSPC-‐SP6 Structures C Carbon R-‐1, R-‐2, R-‐3 Mild to Severe SSPC-‐SP2, Induratar M.C. 1 5.0-‐7.0 Steel C-‐1 to C-‐5m SSPC-‐SP3 Structures (Poles) D Carbon R-‐4, R-‐5 Mild to Severe SSPC-‐SP3 Induratar M.C. 2 5.0-‐7.0 Steel SSPC-‐SP6 Structures (Poles) Note: Footers are to be excavated to a depth of 18” to 24” below grade, cleaned, painted and allowed to dry before backfilling. Footers are to be painted the corresponding height above grade.
- 5. 90% of T&D Structures will require Systems A or B, however some structures will corrode past the ideal “window of opportunity” and require more surface preparation, or more primer, or greater film thickness. Other structures w ill be located near corrosive industries, and/or severe marine exposures; and may require a more chemical resistant coatings system. Always consult w ith your Induron T&D representative before finalizing your coating specification. Use the charts below to determine your e nvironmental exposure r anking, as well as your degree of deterioration/corrosion. Environmental Ranking Environmental Category Exterior C1 C2 Atmospheres with low level o f pollution. Mostly rural areas. C3 Urban a nd industrial a tmospheres; moderate sulfur dioxide pollution. Coastal areas with low salinity. C4 Industrial a reas a nd coastal areas with moderate salinity. C5-‐i Industrial a reas with high humidity and aggressive a tmospheres. C5-‐m Coastal a nd offshore areas with high salinity. Condition of Substrate Condition Company Rating Guide Rating Definition Non-deteriorated (R -‐ 1 ) 0 to 0.1% rust Coating almost intact; red rust covers less than 0.1% of all surfaces Re-evaluate in 6–12 years Slightly to moderately (R - 2) 0.1 to 1% rust deteriorated Coating somewhat weathered; may show slight staining or blistering; after stains are wiped off, less than 1% of surface area shows rust, blistering, loose mill scale, or loose paint film. Re-evaluate in 3–6 years.
- 6. Deteriorated* (A) (R - 3) 1 to 10% rust Coating thoroughly weathered, blistered, or stained, up to 10% of surface area is covered with rust, rust blisters, hard scale or loose paint film, very little pitting visible. Needs attention in 1–3 years Severely deteriorated* (R - 4) 10 to 50% rust. Large portion of surface is covered with rust, pits, nodules, and non-adherent paint. Pitting is visible. Needs attention within 1 year Totally deteriorated* (R - 5) Over 50% rust. Needs immediate attention