ISO 3500:2005

Gas cylinders — Seamless steel CO2 cylinders for fixed fire-fighting installations on ships

ISO 3500:2005 specifies the principal external dimensions, accessories, filling ratio, and marking for seamless steel CO₂ cylinders used in fixed fire-fighting installations on cargo ships, passenger ships, salvage vessels, heavy-lift vessels, tug-barge combinations and offshore drilling and production platforms, any of which can be serviced in port or in dry dock, in order to facilitate the interchangeability of such cylinders.