NA 022
DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE
Technical rule
[CURRENT]
DVGW G 491
DVGW G 491
Gas Pressure Regulating Stations for Inlet Pressures up to and including 100 bar
Title (German)
Gas-Druckregelanlagen für Eingangsdrücke bis einschließlich 100 bar