POWER PLANT:: PAINTING SYSTEMS

   POWER PLANT

PAINTING SYSTEMS

         :   PAINTING SYSTEMS

The following painting specification (Systems) are valid for the different purposes as quoted in the headlines and/or as detailed in the first paragraph of each specification.

 The dry film thickness indicated can be changed as per manufacturer recommendations and Company/Engineer approval.

 Carbon Steel Surfaces up to 100°C, Internal Exposure

Carbon steel surfaces, not insulated, indoors, such as structural steel, cranes, air ducts, pipes, tanks, and vessels' exterior surfaces, valves, and fittings.

At Manufacturers’ Works

Surface preparation:    

Blasting according to SIS 055900 Grade: SA 2 1/2
Primer-optional:         

  Depending on production flow, a weldable single pack inorganic ethyl, zinc silicate shop-primer may be used.

 Dry film thickness 15-25 microns.

Prime coat: 

      Single pack inorganic ethyl zinc silicate. Dry film thickness 75 microns.

At Site

Pre-treatment:           

  A thorough cleaning to remove oil, grease, dirt, and any other contaminants. Dusting of all mechanical damages according to SIS 055900 Grade: ST3

            Touch-up with 2-pack self-priming aluminum-containing high build epoxy. Dry film thickness 75-100 microns

Finish coat:       2-pack epoxy polyamide Dry film thickness 100 microns.
            Total system minimum dry film thickness 175 microns.

            Carbon Steel Surfaces up to 100°C, External Exposure

Carbon steel surfaces not insulated, outdoors, such as structural steel, cranes, air ducts, pipes, tanks, and vessels' exterior surfaces, valves and fittings, and other surfaces.

At Manufacturers’ Works

Surface preparation:     Blasting according to SIS 055900 Grade: SA 2 1/2

Primer-optional:           Depending on production flow, a weldable single pack inorganic ethyl, zinc silicate shop primer. Dry film thickness 15-25 microns.

Prime coat:       Single pack inorganic ethyl zinc silicate. Dry film thickness 75 microns.

At Site

Pre-treatment: Thorough cleaning to remove oil, grease, dirt, and other contaminants. Dusting of all mechanical damage according to SIS 055900 Grade: ST3

            Touch-up with 2-pack self-priming aluminum-containing high build epoxy. Dry film thickness 75-100 microns

Intermediate coat:        2-pack epoxy polyamide. Dry film thickness 125 microns.

Finish coat:       2-pack epoxy polyamide. Dry film thickness 50 microns.
                                    Total system minimum dry film thickness 250 microns.

Note:
 For areas where a high gloss finish is required, the finish coat should be 2-pack aliphatic polyurethane - 50 microns - instead of epoxy.

            Carbon Steel Surfaces up to 100°C, External Exposure

Carbon steel surfaces not insulated, outdoors, such as structural steel, cranes, air ducts, pipes, tanks, and vessels' exterior surfaces, valves and fittings, and other surfaces.

At Manufacturers’ Works

Surface preparation:     Blasting according to SIS 055900 Grade: SA 2 1/2

Primer-optional:           Depending on production flow, a weldable single pack inorganic ethyl, zinc silicate shop primer. Dry film thickness 15-25 microns.

Prime coat:       Single pack inorganic ethyl zinc silicate. Dry film thickness 75 microns.

At Site

Pre-treatment: Thorough cleaning to remove oil, grease, dirt, and other contaminants. Dusting of all mechanical damage according to SIS 055900 Grade: ST3

            Touch-up with 2-pack self-priming aluminum-containing high build epoxy. Dry film thickness 75-100 microns

Intermediate coat:        2-pack epoxy polyamide. Dry film thickness 125 microns.

Finish coat:       2-pack epoxy polyamide. Dry film thickness 50 microns.
                                    Total system minimum dry film thickness 250 microns.

Note:
For areas where a high gloss finish is required, the finish coat should be 2-pack aliphatic polyurethane - 50 microns - instead of epoxy.

            Tanks, Interior - Water

Tanks for industrial, deionized, demineralized and potable water
Temperature up to 600C, pH-range: 4.5 -9.5.

At Site

Pre-treatment: Removal of all welding splatter. Blasting according to SIS 055900 Grade: SA 3.
            Primer, intermediate and finish coat shall be applied as per manufacturer recommendations.

            Total system minimum dry film thickness 375 microns.

             Carbon Steel - Water Immersion

Carbon steel surfaces, intermittently or continuously immersed in freshwater or sewage water, such as

-           Interior of water pipes and piping

-           Interior of vessels and tanks

Temperature up to 60°C

At Manufacturers’ Works

Surface preparation:     Blasting according to SIS 055900, Grade SA 2 1/2

Prime coat:       Inorganic ethyl zinc silicate. Dry film thickness 70 microns.

At Site

Pre-treatment: Thorough cleaning to remove oil, grease, dirt, and other contaminants. A dusting of all mechanical damage, reblasting of weld areas according to SIS 055900, Grade: SA 2 1/2.

            Touch-up with inorganic ethyl zinc silicate to restore original dry film thickness.
Intermediate coat:        2-pack epoxy polyamide. Dry film thickness 40 microns.

Finish coats:      2 coats of 2-pack coal-tar epoxy, amine cured. Dry film thickness 150 microns per coat.
            Total system minimum dry film thickness 410 microns.

             Galvanized Surfaces

Galvanized surfaces, requiring paint finish, indoors and outdoors

At Site

Pre-treatment: Thorough cleaning to remove oil, grease, dirt and any other contaminants.

 To obtain min. 25 microns anchor profile sweep blast surface. If sweep blasting is not practicable, the surface should be etched.

Prime coat:       2-pack epoxy polyamide. Dry film thickness 50 microns.
Finish coat:       2-pack epoxy polyamide. Dry film thickness 100 microns.
            Total system dry film thickness 150 microns.
Note:

For areas where a high gloss finish is required, the finish coat should be a 2-pack aliphatic polyurethane - 50 microns - instead of epoxy.

            Buried Pipes

Buried steel pipework - external surfaces

At Manufacturers’ Works

Surface preparation:     Blasting according to SIS 055900, Grade: SA 2 1/2
Apply Extruded polyethylene bandage or a sintered polyethylene coating. Thickness must comply with the reinforced standard of DIN 30670 or equivalent.

At Site

Pre-treatment: Clean uncoated areas to remove oil, grease, weld slag, and loose dirt. Then apply:
            Polyethylene bandage or sintered polyethylene coating to areas and joints.

            The thickness should be at minimum the same as applied at works and in accordance with the Engineer's instructions.