ViperSkin™ is the first bi-axial, hybrid carbon and glass fiber, pre-saturated system to blend the unsurpassed strength and stillness of carbon with the ease and use of a moisture-cured, factory-saturated polyurethane. The pre-saturated system ensures appropriate fiber-to-resin content ratios to deliver reliable performance in restoring pipeline integrity on lines with complex geometry.
| Feature | Benefit |
| Moisture-cured polyurethane resin | Factory saturation of moisture-cured polyurethane resin reduces composite field preparation time by more than 50% |
| Factory-saturated fiber | Factory saturation ensures the right fiber-to resin ratio with constant strength and mechanical properties |
| Full engineering consultation and support | Easy application in any conditions, including damp or sweating pipes and in submerged environments |
| Non-shielding | No heating or post-curing steps necessary |
| Can be applied to any geometry including, but not limited to elbows, tees, and flanges | Suitable for irregular shapes and geometries |
| Conforming Standards: ASME PCC-2, ASME B31, ISO 24817, DOT, API, and CSA Z662 standards for nonmetallic reinforcing solutions | Can be used on lines (pipes) of any diameter |
Applications
- Transmission and distribution pipelines
- Energy risers and subsea structures
- Process piping: chemicals, oil, gases, water, and steam
- Mechanical dents and defects
- Girth welds on vessels and pipelines
- Straight pipelines, elbows, tees, and flanges
|
Part Number |
Wrap Size Width (in) & Length (ft) |
Pipe Size coverage by wrap |
| VP205 | 2 in x 5 ft | ½ to 1 in |
| VP309 | 3 in x 9 ft | 1 ¼ to 2 in |
| VP415 | 4 in x 15 ft | 2 ½ to 4 in |
| VP420 | 4 in x 20 ft | 4 to 6 in |
| VP430 | 4 in x 30 ft | 4 to 6 in |
| VP450 | 4 in x 50 ft | 4 to 8 in |
Related Products
The following products are system components of the Viper-Skin system:
• Load Transfer Epoxy: Syntho-Poxy™ HC Reinforcing
• Anti-Corrosion Primer: Syntho-Subsea™ LV Epoxy
• Insulating Glass Layer: Syntho-Glass® XT
• UV protection: Syntho-Coat or Syntho-Glass® UV
• Compression Film
Standards
Viper-Skin was designed to conform to ASME PCC-2, ASME B31, ISO TS24817, DOT, API,
and CSA Z662 standards for nonmetallic reinforcing solutions. Consult NRI Engineering for specified use.
Surface preparation and profiling shall promote continuous intimate contact between the CFRP system and pipe by providing a clean, smooth, and circumferential surface. Surface preparation shall be in accordance with SSPC-SP1 “Solvent Cleaning” and SSPC-SP10 / NACE 2 “Near White Blast Cleaning” 1-3 mil surface roughness (25-75 microns). If an existing coating is present, roughen to degloss. The Viper-Skin composite repair system is a bond-critical composite repair system requiring a strong adhesive bond between the clean pipe and the Viper-Skin system.
Physical Properties
- VOCs: None
- Set Time: 30 Minutes at 75°F (24°C)
- Resin Type: Water-activated polyurethane
- Resin Application: Pre-impregnated
- Service Temperature: -50° to 250°F (-45° to 121°C)
- Application Temperature: 32° to 150°F (0° to 65°C)
- Pressure once cured w/primary sealant: Max 300 psi (20.6 bar)
Working Time
- 20 minutes @ 75˚F (24˚C), less at higher temperatures
Shelf Life
-
12 months with recommended storage
Storage Conditions
- Store in a cool, shaded area at an ambient temperature of 95ºF ( 35ºC)