The StrongBack Composite Systems consist of just two (2) components, the GS epoxy load transfer/coating agent and the StrongBack Tape. The epoxy coating is applied over the damaged or corroded pipe surface. StrongBack tape is then wrapped over the epoxy, either circumferentially over itself or in a helical pattern if the repair length is extensive, curved or oddly shaped, to the predetermined number of plies. This combination of products transfers the hoop stresses from the damaged pipeline to the composite StrongBack sleeve.
Due to the StrongBack tape’s preset malleability it is excellent for reinforcing elbows, bends and other odd shaped segments. The StrongBack Composite Systems can also be applied underwater by divers and in most cases without requiring an underwater habitat.
As a self-contained, resin-impregnated, water-activated wet lay-up wrapping system, the StrongBack can be a permanent, high strength alternative to metal Sleeves, welding and other mechanical repairs. Installation can be completed in minutes and without requiring any special tools. A high post-cure strength is achieved by the material’s inherent strength, physical characteristics and a complete fit-up integrity and conformity between the reinforcing wrap and the pipe.
Extensive creep testing has indicated that the long term (25 year) load carrying capacity of the StrongBack tape is in excess of 50% of its static strength. Even at elevated temperatures the indicated load carrying capacity exceeds 45% of its initial room temperature strength.
The StrongBack Composite Systems conform to the latest DOT regulations for pipelines. The repair, which can be considered as permanent and the coating of the pipeline is achieved in just one procedure. All the materials can be shipped “Non-Regulated” by USDOT, IATA, and IMO.
The design (numbers of plies) and precise material requirements of the StrongBack Composite System can be determined from the StrongBack SleeveCalc® mini-CD. A minimum of four (4) plies are required for all reinforcement systems, regardless of pipe diameter.
STRONGBACK PIPE REINFORCEMENT SYSTEMS
Used in partnership with the load transfer, undercoat, the GS–561 epoxy, to restore full strength to damaged or corroded sections of pipelines, girth welds, piles, etc.
Proven as an effective long term or temporary substitute on pipe with significant wall loss.
Applied to risers, J tubes and in splash zones, rock shield, pipe saddles, pull throughs.
Provides effective corrosion prevention barrier, particularly in high temperature situations in the atmosphere, buried or underwater.
Is nonconductive up to 16,000 volts in its cured state. It can be used to cover and insulate electrical connections and apparatus.
For patching, leak sealing, etc., above and below water, pipe hangers, braces, clamps, railings, fences, etc.
TENSILE STRENGTH: 61,220 psi (ASTM–D–3039 Modified)
FLEXURAL STRENGTH: 53,100 psi (ASTM–D–790)
COMPRESSION STRENGTH: 32,800 psi (ASTM–D–695)
INTERLAMINAR SHEAR: 4,500 psi (ASTM–D–2344)
GLASS TRANSITION TEMP: 122°C (252°F) (ASTM–E-831)
TEMPERATURE CYCLE: 16 layers cycled 24°C (75°F) – 232°C (450°F) with no delamination
CURE TIME: 30–60 minutes
SHORE D HARDNESS: 80
HEAT RESISTANCE: 260°C (500°F)
MAX. INSTALLATION TEMP: 177°C (350°F)
DIELECTRIC STRENGTH: Nonconductive when cured (16,000 volts)
TRANSPORTATION: Non-regulated/nonhazardous – Freight Class NOI – Item 4600 Class 60
CHEMICAL IMMERSION TESTS
ASTM–D–543 (30 day immersion period)
Diesel Fuel: PASS
Ethyl Alcohol: PASS
30% HCL: PASS
VIEW A TYPICAL STRONGBACK INSTALLATION
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