A+Wrap™
A+ Wrap est un système de réparation composite durcissant à l’humidité basé sur une fibre de verre d’une haute résistance. A+ WrapTM est utilisé en général sur les canalisations et les systèmes de tuyauteries souffrant de corrosion ou de dommage mécanique. En conformité avec les normes ASME PCC-2 et ISO 28417, A+ Wrap renforce les canalisations en contenant les charges circonférentielle et axiale, réduisant ainsi la tension dans la zone défectueuse. Le système ne nécessite aucun outil particulier pour son application et sèche en une heure après sa mise en œuvre.
Specifications techniques
Mechanical Properties Attribute–Tensile Strength Method– ASTM D3039 Value– 51,800 psi Attribute–Tensile Modulus Method–ASTM D3039 Value–3.01 x 106 psi Attribute–Poisson's Ratio Method–ASTM D3039 Value–0.077 Thermal Properties Attribute-Thermal Expansion Method–ASTM E831 Value–10.2 μm/m/°C Attribute–Heat Distortion Temperature Method–ASTM D648 Value–205 °C Attribute–Max Operating Temperature Method–ASME PCC-2 Value–185 °C Attribute–Application Temperature Value– -50°F to 120°F -46°C to 49°C System Properties Attribute– Ply Thickness Value–22 mils (0.022 inches) Attribute–Working Time Value–20 – 30 minutes Attribute–Set Time Value–2 hours Attribute–Cure Time Value–24 hours Attribute–Shelf Life Value–1 year with proper storage Attribute–Stocked Sizes Value–From 2\" X 12' to 12\" X 90'
Installation
1. Surface Preparation Remove all soft coatings and media blast the pipe to a 2.5 mil profile (NACE 3 minimum). Wipe the surface with a solvent such as Acetone, Toluene, or MEK. 2. Load Transfer Filler Mix the putty or paste until uniform in color and apply to any defects. Shape the filler to near net surface profile of pipe. 3. Adhesive Primer Mix equal parts of the adhesive primer until uniform. Apply the primer to the pipe surface, ensuring a minimum of 30-mil coverage. Allow the primer to sit until a “peanut butter” thickness is achieved. 4. A+ Wrap™ Preparation Remove the A+ Wrap™ from the foil pouch and submerse in water for 1 minute. Wrap the material around the pipe, while spraying each layer with water. Apply uniform tension during application. 5. Apply Compression Wrap Tightly apply 4-6 layers of compression wrap over the repair. Perforate the surface of the compression wrap to enable out-gassing. 6. Apply Top Coating if Needed Allow two hours for the A+ Wrap to harden before removing the compression wrap. Afterwards, if needed, apply the pipe coating.
