The standard applies to check valves intended for all flammable gases, air and oxygen dis ributed through pipelines, with the exception of acetylene, for operating temperatures from -5 °C to +60 °C and an operating pressure up to 300 mbar, as well as for gas installations with a supply pressure of up to 8 bar and with a nominal diameter up to DN 100.
NEN 7206-1982 history
1982NEN 7206-1982 Non-return valves for gas, air and oxygen