PPG Sigmaline 2000, a two-component, solvent-free, amine-cured phenolic epoxy coating for one-coat application direct to metal for pipe externals. Suitable for bell holing jobs, the coating system is resistant to well-designed cathodic protection and is approved to Saudi Aramco APCS 113A and meets the requirements of EN10289.

Features & Benefits

• One-coat system direct to metal for pipe externals
• Suitable for bell holing jobs
• Resistant to well-designed cathodic protection
• Glossy and smooth appearance
• Can be applied by heavy-duty, twin-feed, hot, airless spray equipment
• Can be applied at a substrate temperature of 90°C (194°F)
• Reduced explosion risk and fire hazard
• Approved to Saudi Aramco APCS 113A
• Meets the requirements of EN10289

Product Data

Two-component, solvent-free, amine-cured phenolic epoxy coating

Notes:

• Refer below for more details on spreading rate and film thickness, overcoating intervals and curing times

Surface Preparation

Recommended Substrate Conditions and Temperatures

Substrate conditions

• Steel; blast cleaned to a minimum of ISO-Sa2½, blasting profile 50 – 100 µm (2.0 – 4.0 mils)

Substrate Temperature & Application Conditions

• Substrate temperature during application and curing should be above 5°C (41°F)
• Substrate temperature during application and curing should be at least 3°C (5°F) above dew point

Application

Instructions for Use

Mixing ratio by volume: base to hardener 80:20 (4:1)

• When mixing, the temperature of the base and hardener should be at least 20°C (68°F)
• At lower temperature, the viscosity will be too high for spray application
• No thinner should be added

Induction Time

• None.

Airless spray

Recommended thinner

• No thinner should be added

Nozzle orifice

• Approx. 0.53 mm (0.021 in)

Nozzle pressure

At 20°C (68°F) paint temperature min. 28.0 MPa (approx. 280 bar; 4061 p.s.i.). At 30°C (86°F) min. 22.0 MPa (approx. 220 bar; 3191 p.s.i.)

Note:

• Use heavy-duty, single-feed, airless spray equipment, preferably 60:1 pump ratio and suitable high-pressure hoses
• In-line heating or insulated hoses may be necessary to avoid cooling down of paint in hoses at low air temperature
• Length of hoses should be as short as possible

Brush/roller

For stripe coating and spot repair only

Recommended thinner

• No thinner should be added

Cleaning Solvent

• THINNER 90-83 (preferred) or 90-53.

Note:

All application equipment must be cleaned immediately after use. Paint inside the spraying equipment must be removed before the pot life has been expired.

Spreading Rate and Film Thickness

Note:

• Maximum DFT when brushing: 150 µm (6.0 mils)

Measuring wet film thickness

• A deviation is often obtained between the measured apparent WFT and the real applied WFT
• A difference is often obtained between the measured apparent WFT and the real applied WFT. This is due to the thixotropy and the surface tension of the paint, which retards the release of air, trapped in the paint film for some time
• Recommendation is to apply a WFT, which is equal to the specified DFT plus 60 µm (2.4 mils)

Measuring dry film thickness

• Because of low initial hardness the DFT cannot be measured within some days, due to the penetration of the measuring device into the soft paint film
• The DFT should be measured using a calibration foil of known thickness placed in between the coating and the measuring device

Overcoating interval for DFT up to 300 µm (12.0 mils)

Notes:

• Surface should be dry and free from any contamination

Curing time for DFT up to 600 µm (24.0 mils)

Notes:

• Adequate ventilation must be maintained during application and curing (please refer to information sheets information sheet 1433 and Directives for Ventilation Practice (information sheet 1434)

Pot Life (at application viscosity)

Note:

• Due to exothermic reaction, temperature during and after mixing may increase
• It is recommended to use plural airless equipment due to the short pot life when paint temperature is above 40°C (104°F)

Safety Precautions

• For paint and recommended thinners, see information sheets information sheet 1430, information sheet 1431 and the relevant Material Safety Data Sheets in the attachments section above
• Although this is a solvent-free paint, care should be taken to avoid inhalation of spray mist, as well as contact between the wet paint and exposed skin or eyes
• Ventilation should be provided in confined spaces to maintain good visibility

References

• Conversion Tables (information sheet 1410)
• Explanation to product data sheets (information sheet 1411)
• Safety Indicators (information sheet 1430)
• Safety in Confined Space and Health Safety, Explosion Hazard - Toxic Hazard (information sheet 1431)
• Safe Working in Confined Spaces (information sheet 1433)
• Directives for Ventilation Practice (information sheet 1434)
• Cleaning of Steel and Removal of Rust (information sheet 1490)
• Specification for Mineral Abrasives (information sheet 1491)
• Surface Preparation of Steel Pipes and Fittings Shop Application (information sheet 1492)
• Internal Chemical Cleaning of Steel Pipes (information sheet 1493)
• Relative humidity - Substrate Temperature - Air Temperature (information sheet 1650)