Flange adapters are produced from black high-density polyethylene PE100 compound. The PE100 compound is a homogeneous mixture of polyethylene, antioxidants, pigments, and UV radiation stabilizers. The PE100 raw material complies with SR ISO 4427-1 and SR EN 12201-1 standards. Manufactured as injected fittings. Reference standard SR EN 12201-3: Plastic piping systems for water supply, service connections, and pressure drainage systems – polyethylene (PE). Part 3: Fittings. For use in potable water supply networks with an operating pressure of PN 10 bar, installed underground. The service life is 50 years, corresponding to an operating temperature of 20 °C and a working pressure equal to or less than the PN for which the fitting was manufactured. Connection methods: – by butt welding with fittings/pipes of the same SDR. – by electrofusion.