FIPP Liner Rehabilitation: The Invisible "Pipeline Doctor"

At the core of FIPP technology is a process where a high-density polyethylene (HDPE) base material is heated and stretched into a flexible hose, then inverted and inserted into the existing pipeline using air pressure; upon cooling, it forms a "pipe-within-a-pipe" composite structure. This process endows the rehabilitated pipeline with three key advantages:

Structural Strength: The liner and the host pipe form an integrated unit; ring stiffness reaches 12.5 kN/m² (far exceeding the 8 kN/m² of standard PVC pipes), and settlement resistance improves by 40%.

Construction Efficiency: For pipeline rehabilitation with diameters ranging from DN200 to DN3000, the project duration is only one-fifth that of traditional open-cut methods (e.g., a DN1500 sewer rehabilitation takes 3 days to complete, with traffic restored in 7 days).

Service Life: The HDPE material is resistant to acid and alkali corrosion, and the liner fits seamlessly against the host pipe, extending the pipeline's service life by over 30 years.

Diameter Adaptability: The FIPP liner tolerates deformation rates of up to ±20% in the host pipe, making it particularly suitable for severely deformed pipes such as concrete or cast-iron lines.

Material Compatibility: The HDPE material withstands water temperatures of up to 90°C, making it suitable for high-temperature environments such as wastewater treatment plants and chemical industrial parks.