CEN/TC 69/WG 8 - Valves for liquified natural gas and for the distribution of natural gas

This European Standard deals with metal isolating valves used for gas distribution systems with maximum operating pressure up to 16 bar, and which operate with fuel gases of the first, the second and the third family, in accordance with EN 437.
The types of isolating valves to be considered are: plug and ball valves, gate valves, globe valves and butterfly valves.
This standard does not apply to:
-   valves for domestic installations;
-   safety type pressure relief valves;
-   wellhead valves.
In the case of power operated valves, the requirements for the power source are not covered by this European Standard.
The valves covered in this European Standard operate in the following classes of temperature:
-   - 10 °C to 60 °C;
-   - 20 °C to 60 °C;
-   the range is stated by the purchaser for special design.
This European Standard gives additional requirements to the relevant products standards. (See Annex B.)
In case of contradictions between the standards mentioned in Annex B and this European Standard, EN 13774 prevails.

This European Standard specifies the general performance requirements of isolating valves (gate valves, globe valves, plug and ball valves and butterfly valves) used in the production, storage, transmission (by pipeline, rail, road or sea) of Liquefied Natural Gas (LNG). LNG filling valves for vehicule refuelling systems are excluded from the scope of this standard. DN range from DN 8 to DN 1000. PN range from PN 16 to PN 100. Class range from Class 150 to Class 900. Temperature range from - 196 °C to + 60 °C.

This EN deals with isolating valves used for gas distribution systems with maximum operating pressure <= 16 bar, and which operate with fuel gases of the first and second family, according to EN 437. It applies to valves DN 25 and larger. The types of isolating valves to be considered are: plug and ball valves, gate valves, globe valves and butterfly valves.