PE100 SDR11 pipes (GasKIT) are utilized in external natural gas transport networks with a maximum operating pressure (MOP) of 10 bar (reference temperature 20°C). The pipes are installed underground. The pipes are manufactured from high-density polyethylene, type PE100. The raw material is a homogeneous mixture of polyethylene, antioxidants, pigments, and UV radiation stabilizers. The pipes are black with yellow longitudinal co-extruded stripes. The average outer diameters, deviation from circularity (ovality), and pipe tolerances comply with SR EN 1555-2:2011. The wall thickness and thickness tolerances of the pipes meet the requirements of SR EN 1555-2:2011.