scope:

This European Standard specifies constructional, functional, sizing, and testing requirements, also documentation and marking of gas safety shut-off devices: - for operating pressures up to 100 bar and nominal diameters up to DN 400; - used at an operating temperature range from -20 °C to +60 °C which operate with fuel gases of the 1 st and 2 nd family according to EN 437 in transmission and distribution networks and industrial installations. For operating pressures higher than 100 bar or nominal diameters DN > 400 or operating temperatures outside the range -20 °C to 60 °C, this standard can be considered as a guideline.