The HOBAS NC Line are glass-reinforced polyester (GRP) pipes manufactured using the filament winding process and designed for constructing or rehabilitating non-circular sewers. These special pipes can be made to fit inside the old sewer for rehabilitation or in virtually any shape required for new installations. Consisting of polyester resin, quartz sand and glass, the pipes are manufactured on basis of DIN EN 14364.

HOBAS NC Line Pipes are manufactured on a computer-controlled filament winding machine that can produce specially shaped pipes with both circular and non-circular cross-sections up to a diameter of 3000 mm. Different pipe shapes  and wall thicknesses can be supplied and are selected to cater for the load cases involved. Design and manufacture of the HOBAS NC Line thus meets a wide range of customer specifications.