ISO 4437-4
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4: Valves
Rohrleitungssysteme aus Kunststoffen für den Transport gasförmiger Brennstoffe - Polyethylen (PE) - Teil 4: Armaturen
Responsible national committee
NA 054-05-08 AA - Plastics piping systems for the supply of gaseous fuels
Responsible international committee
ISO/TC 138/SC 7 - Valves and auxiliary equipment of plastics materials