Composite System StrongBack Composite System The StrongBack System consists of StrongBack tape in conjunction with GS561 and/or GS154, proprietary load transfer/coating agents. This combination of StrongBack products will effectively transfer the load from the corrosion pit to the composite StrongBack sleeve, eliminating moisture and oxygen migration under the sleeve when properly applied. Repair and coating of line is achieved in one procedure. The StrongBack System can be applied under water by diver without the need for a habitat in most instances. GS154 uses dual color components that turn grey, giving visual confirmation of correct mix when ready for use. GS561 is based on a unique blend of liquid epoxy polymer and aliphatic polyamine curing agents which is able to displace water from wet surfaces in order to make a permanent bond. The formulation is solvent-free to ensure safety and maximum technical performance. Kevlar fibers are incorporated for reinforcement and viscosity management to achieve high application rates even under water. GS561 uses advanced low toxicity curing agents with two color components that turn green, giving visual confirmation of correct mix when ready to use.
Mechanical Properties Tensile Strength (73ºF) ASTM-D-3039:Modified 61220psi Flextural Strength (77ºF) ASTM-D-790 53100psi Compression Strength ASTM-D-695 32800psi Interlaminar Sheet (77ºF) ASTM-D-2344 4500psi Glass Transition Temperature ASTM-E-831 122°C Temperature Cycle Test 16 layers cycled from 75°F-450°F with no delamination or loss of bond
Technical Specification Number of plies required Computer disk supplied as guideline for pipe application 10” OD and less-8 plies min.,Over 10” OD-10 plies min. Application Method Water activated wet layup Cure Time 30-60 minutes Shore D hardness (24hr cure) 80 Heat Resistance (24hr cure) 500°F Max. Installation Temperature 350°F Dielectric Strength Non conductive when cured (16,000 volts) Transportation Non regulated/non hazardous-Freight Class NOI-Item-4600 Class 60
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