Protal 7900 HT by Denso
High Temperature Pipeline Coating up to 302°F (150°C). Used on girth welds, pipe, fittings, valves and fabrication.
Denso Protal 7900HT is a VOC free, 100% solids epoxy coating for pipelines operating at higher temperatures. It is a high-build liquid coating that can be hand or spray applied in one coat in the field or shop. It cures fast to allow quick backfill when applied to hot pipe.
Uses
Spray or hand applied to pipelines operating at temperatures up to 250°F (121°C). Used on girth welds, pipe, fittings, valves and fabrication.
Features
- High build (up to 40 mils in one coat)
- Can be spray or hand applied
- Excellent adhesion
- Service temperature up to 302°F (150°C)
- Very low permeability
- High abrasion resistance
- Safe and environmentally responsible
- Does not shield cathodic protection
Application
- By Hand:
Prepare surfaces by grit blasting to a clean near white finish, SSPC-SP 10/NACE No. 2. Mix each of the base and hardener to an even consistency. Add the hardener to base and mix until an even color is achieved making sure all sides of container are scraped. Product shall be applied to surfaces ranging from 40°F (4°C) to 220°F (105°C) at a minimum of 30 mils. Immediately pour mixed material onto surface and brush, trowel or roll to required mil thickness. A wet film thickness gauge should be used to measure mil thickness.
- Spray:
Prepare surfaces by grit blasting to a clean near white finish, SSPC-SP 10/NACE No. 2. The equipment should be a plural component airless spray unit with a proportioning pump capable of a volume mixing ratio of 3:1. Standard ancillary equipment should include minimum 10 gallon hoppers, static mixers, whip hose, and mastic gun. (Applicator should consult with Denso regarding recommended equipment). Product shall be applied to surfaces ranging from 40°F (4°C) to 220°F (105°C). A wet on wet spray technique should be used to achieve a minimum thickness of 30 mils. The coating thickness should be measured using a wet film thickness gauge.
Technical Data
| Properties | Data |
|---|---|
|
Solids Content |
100% |
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Base Component - unmixed @ 77°F (25°C) |
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Hardener Component - unmixed @ 77°F (25°C) |
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Mixed Material - mixed @ 77°F (25°C) |
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Mixing Ratio by Volume |
3 parts base: 1 part hardener |
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Theoretical Coverage |
14 ft2 / 30 mils / liter |
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Cure Times |
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Theoretical Coverage |
14 ft2 (1.3 m2) / 30 mils / liter |
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Thickness |
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Holiday Detection |
100 volts / mil |
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Hardness (ASTM 2240) |
Shore D min. 85 |
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Resistance to Cathodic Disbondment |
Excellent |
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Abrasion Resistance |
Excellent |
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Adhesion to Steel |
3,030 psi |
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Maximum Service Temperature |
250°F (121°C) |
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Intermittent Maximum Service Temperature |
302°F (150°C) |
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Pot Life @ 77°F (25°C) |
30 minutes |
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Initial Handling @ 77°F (25°C) |
4 to 6 hours |
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Initial Handling @ 220°F (104°C) |
15 to 20 minutes |
Handling & Storage
| Properties | Data |
|---|---|
|
Storage |
Minimum 24 months when stored in original containers above 40°F (4°C). On job-site where temperatures are below 68°F (20°C), product must be kept warm to mix properly. |
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Cleaning |
Clean equipment with solvent cleaner (Xylene 95%, Butanol 5%). |
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Packaging |
1.0 liter and 2.0 liter kits. For spray applications, sold in 75 liter and 800 liter drums. Special kit sizes are available on request. |
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Safety |
