1. Overview
The PipeFiber aramid pipe-repair system pairs a dedicated resin with an aramid composite cloth, wrapped circumferentially around the defective section. The composite carries hoop load together with the host pipe, raising the load-bearing capacity and extending the service life of the pipeline.
2. Physical Properties
Quality criteria for the aramid cloth supplied with PipeFiber:
- Golden-yellow weave, uniform and aligned, with clear reference cut-lines, free of dust or other contamination
- No missing or broken wefts, no broken warps, no holes
- Straight, evenly distributed fibers — no skew or wrinkles
- High strength and high elastic modulus
3. Technical Advantages
The PipeFiber system is high-performance and field-friendly:
- Impact resistance — aramid elastic modulus ~ 110 GPa, elongation 2.0%, plastic failure mode
- Dynamic-load fatigue — highest shear performance of any FRP material
- Chemical resistance — withstands acids and strong alkalis; widely used in saline / acidic oilfields, pipelines and harbours
- Non-conductive and non-magnetic — safe in sensitive corridors
4. Technical Parameters
Epoxy impregnant
| Property | Value |
|---|---|
| Tensile strength | ≥ 40 MPa |
| Elastic modulus (tension) | ≥ 2500 MPa |
| Elongation | ≥ 1.5 % |
| Flexural strength | ≥ 50 MPa |
| Compressive strength | No brittle failure |
| Non-volatile content | ≥ 99 % |
| Mix ratio (by weight) | 2 : 1 |
| Mixed density | 1.05 – 1.25 g/cm³ |
| Pot life at 25 ℃ | 40 min |
Aramid cloth
| Property | Value |
|---|---|
| Tensile strength | 2100 MPa |
| Elastic modulus (tension) | 1.1 × 10⁵ MPa |
| Elongation | 2.21 % |
5. Installation Workflow
Installers must be qualified and follow this sequence:
- Preparation — drafting the procedure, mobilising cloth, resin, and tools
- Surface prep — remove flaking, spongy zones, honeycomb and corrosion; level with repair compound
- Primer coat — mix according to ratio, apply within window, allow to tack-dry
- Wrap with aramid — cut to design, impregnate, wrap; roll along the fiber direction to expel air
- Topcoat — apply protective coating per specification, ensuring adhesion to the aramid layer
6. Applications
PipeFiber aramid composite serves oil, chemical and gas pipeline repair, plus municipal, mining and pressure-vessel reinforcement — with strong field performance in both planned and emergency repairs.