The upgraded Nordic spiral wound tubing, exemplified by the NORDILOC™ S and NORDILINER systems, offers enhanced structural strength, fiber reinforcement, and flexible installation for diameters up to 3000 mm.

Key Features and Improvements

NORDILOC™ S is a spirally wound PVC lining system designed for gravity pipes, featuring a tubular configuration with hot melt seam sealant and optional steel reinforcement. It allows precise wall thicknesses (e.g., 0.7 mm and above) and ensures high-quality performance through strict quality control procedures . This system improves durability, chemical resistance, and installation reliability compared to earlier spiral wound tubing. NORDILINER is a Pull-In-Place-Pipe (PIPP) system suitable for diameters from DN 50 to 1200 mm. It is structurally self-supporting, eliminating the need for bonding to the host pipe. The liner is fiber-reinforced with a three-layer composition:

• Outer Layer: Polyethylene, thermoplastic polyurethane, or other elastomers for protection and dimensional stability.
• Middle Layer: Seamless fiber reinforcement providing high resistance to internal pressure.
• Inner Layer: Coating with excellent chemical, thermal, and mechanical resistance .

Advantages Over Previous Versions

• Enhanced Strength and Flexibility: Fiber reinforcement and multi-layer design allow the liner to withstand high internal pressures while remaining flexible for installation.
• Simplified Installation: Folded and winched into existing pipelines, the liner inflates with compressed air or fluid pressure, avoiding time-consuming curing processes typical of CIPP systems.
• Wide Application Range: Approved for potable water, industrial water, sewer, and bypass applications.
• Customizable Diameters: NORDILOC covers gravity pipes from 800 to 3000 mm, while NORDILINER handles smaller diameters from 50 to 1200 mm, providing a “one-stop” solution for pipe rehabilitation .

Technical Enhancements

• Material Quality: Use of high-end lining materials and elastomers ensures chemical and temperature resistance.
• Precision Manufacturing: Spiral winding allows controlled wall thickness and consistent tubular geometry.
• Accessories and Support: Telemetric systems and specialized tools enhance installation accuracy and monitoring . The upgraded Nordic spiral wound tubing systems combine mechanical robustness, chemical resistance, and installation efficiency, making them suitable for modern trenchless pipe rehabilitation projects across a wide range of diameters and applications.