Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
Applications & Uses
- Applications
- Application Area
- Application Method
- Cure Method
- Recommended Uses
HERESITE P-403L is designed for use in tank cars, railcars, storage tanks, heat transfer equipment, piping, spiral heat exchangers, blowers, fans, and other industrial equipment where chemicals with a pH value less than 9 are likely to be encountered.
Railcars: P-403L baked phenolic was the first organic lining ever installed in a railcar in North America. Today, thousands of cars have been lined with P-403L.
Tanks and Vessels: P-403L has been used to line tanks and vessels as well.
- Coverage
Theoretical coverage is approximately 750 square feet per gallon per dry mil. Coverage rates are estimates and make no allowance for material loss. Actual rates will vary depending on application method, surfaces, etc.
- Thinners and Cleanup
Recommended use of Heresite S-275 (VOC exempt solvent). If a slower solvent is required, use of Heresite S-215 is an option, please consult local VOC regulations.
- Surface Preparation
- All surfaces must be clean, sound, and free of any oils, dirt, grease, wax and any other contamination that may interfere with coating adhesion
- For best results, all bare surfaces must be properly prepared prior to application of this product
- For previously coated/treated surfaces, confirmation of adhesion should be performed
- If applying to bare steel, it is required to commercially blast in accordance with NACE #1 or SSPC-SP-5 specifications
- Surface profile or anchor pattern shall be 20-25% of the recommended dry film thickness
- If applying to bare aluminum, it is required to commercially blast or apply Heresite P-700APHS as a primer
- Thinning
Suggested thinning at 77oF is 10-15% based on coating volume using Heresite S-275. The amount of thinner required is dependent upon temperature, ventilation, humidity, application type and desired film thickness.
- Spray Application
- Do not apply if temperature is less than 5°F above dew point, or if temperature is below 45°F
- Use standard production type spray equipment (conventional, HVLP, airless, etc.)
- A Spray viscosity will be dependent on type of equipment being used. It has been seen that spraying at dip viscosity is very effective
- Spray equipment: always flush spray equipment with solvent to clean prior to applying coating
- Air supply must be uncontaminated
- Adjust air pressure to approximately 80 pounds at the gun and provide 15 - 20 pounds at pressure pot
- Adjust spray gun by first opening liquid valve and then adjust air valve to give approximately an 8” - 12” fan, holding gun perpendicular to the surface at a distance of 12”
- Apply a mist bonding pass
- Allow to flash off for several minutes, but not long enough to allow film to completely dry
- Apply a wet film of approximately 3 mils (measured immediately after spraying), normally sprayed in 3 to 4 passes.
- Repeat until desired film thickness is obtained
- Air dry a minimum of 60 minutes with ventilation prior to introducing heat
- After the air dry period has elapsed, introduction of heat slowly is required
- Bake Schedule
Intermediate Bake:
- 90°C (metal temperature) held for 15 minutes
- Larger equipment and heavy gage metal will require longer bake times to obtain metal temperature
Final Bake:
- For Maximum Chemical Resistance: All temperatures listed are based on metal temperatures
- Starting from room temperature, the temperature should then be raised approximately 22°C (30°F) in increments of 30 minutes until 204°C (400°F) has been reached. Hold 204°C (400°F) (metal temperature) for 90 minutes
- To determine correct bake, evaluate the color and/or saturate a cloth with S-275, rub coating lightly. Coating should wipe off between coats, but should not after final bake (cure)
If using P-403L in conjunction with Heresite L-66L, the P-403L should be intermediate baked prior to application of the L66L.
- Cleaning Frequency
At a minimum, coils should be inspected and cleaned at least once per year. In extreme environments, where the coils are exposed to high concentrations of salt air (within 25 miles of any seacoast), or where they are installed near engine exhausts, plumbing or manufacturing vents, or regularly exposed to corrosive chemicals, you may need to clean coils more often, up to 4 times per year.
- Cleaning Process
- Turn off electrical power to the unit using lock-out system
- Flush the coil with water to rinse off loose residue. Allow the water to soak for 10–20 minutes to loosen surface residue
- Flush the coil thoroughly with any mild liquid detergent and warm water (~100°F) until all signs of residue are eliminated. If harsher cleaners are required for your environment, please contact Heresite for advice
- Rinse the unit thoroughly with clean water (it should not be brackish or contain excessive dissolved minerals)
- Allow the unit to dry completely prior to turning the electrical power on or returning the unit to service.
- Avoid
- Water under high pressure, such as a high-pressure washer. Fins may fold under high pressure causing the coating to crack
- Abrasive products or processes to scour or remove dirt
- Striking the coil with a tool to dislodge or remove soil or residue
- Corrosive, caustic or alkaline cleaners (with a pH 5.5 - 8.5) as these may permanently damage the coating and void the warranty
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Abrasion Resistance (Weight loss per 1,000 cycles CS-17 wheel with 1,000 g weight) | 80 | mg | - |
| Dry Heat Temperature | 400 | °F | - |
| Film Thickness (Dry, 2 - 3 Coats) | 5 - 7 | mils | - |
| Flexibility | 1 | inch | Mandrel Bend Test |
| Solids by Volume | 49 | % | - |
| Solids by Weight | 65 | % | - |
| VOC Content | 3.38 | lbs/gal | - |
Regulatory & Compliance
- Certifications & Compliance
- Compliance
This coating is formulated to be compliant with FDA 21 CFR 175.300.
Technical Details & Test Data
- Chemical Resistance
P-403L offers excellent immersion service resistance to 92 - 98% sulfuric acid up to temperatures of 120°F.
Exposure Immersion Splash & Spillage Acids Excellent Excellent Solvents Excellent Excellent Inorganic Salts Excellent Excellent Water Excellent Excellent
Packaging & Availability
- Packaging Type
- Packaging
P-403L is available in one gallon, five gallon and 54 gallon drum quantities.
Storage & Handling
- Storage Conditions
- Coating should not be stored longer than 6 months
- Coating should be stored in a clean, dry environment at 50°F - 75°F
- Keep out of direct sunlight
- Avoid excessive heat and keep from freezing.