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