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Technical Notes

Juneng Large-Diameter Pipe Repair with Carbon-Fiber Cloth

The dedicated carbon-fiber composite pipe-repair system — high-strength compound, carbon-resin composite, outer protective layer — applied on site, ambient cure.

Published: 2021-06-16

Juneng Large-Diameter Pipe Repair with Carbon-Fiber Cloth

The dedicated carbon-fiber composite pipe-repair system has three core components:

  1. High-strength dedicated repair compound
  2. High-strength carbon-resin composite
  3. Outer protective layer

The composite is wrapped onto the host pipe and cured at ambient temperature in the field.

Nine Technical Advantages

  1. Hot-work free
  2. Rapid response
  3. In-service repair, no shutdown
  4. Long life — 50-year design life
  5. High composite performance — high modulus, high strength, high elongation
  6. Excellent corrosion resistance
  7. Conforms to any pipe geometry
  8. Handles any defect type
  9. Compatible with any piping system

Rapid in-service repair shortens the window to 1–2 hours, much faster than welding. No-shutdown repair and relaxed condition requirements deliver clear economic benefits — avoiding heavy losses from shutdown.

Typical Project

A power-plant cooling-water loop facing failure from corrosion and impact was reinforced with carbon-fiber epoxy at the defect zones — restoring strength quickly. The system gives large-diameter pipework a fast engineering solution for sustained pressure and service life.

Supply

Juneng Weiye supplies unidirectional and bidirectional carbon-fiber cloth, bidirectional aramid cloth, and epoxy resins for pipeline reinforcement. The pipeline division focuses on pressure-pipe repair for petrochemicals, urban gas, pressure vessels and pressure-pipe manufacturing.