Tenaris produces high pressure cylinders, with working pressures up to 350 bar, starting from seamless steel tubes, in a wide dimensional range with outer diameter ranging from 168.3 to 273 millimetres and capacity from 14 to 90 litres. The quality assurance system, conforming to the ISO 9001 standard, is recognized by the major producers and distributors of technical gases, for export to all European countries and the majority of the world.