ISO 3500:2005

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.