In Italy, for fire extinguishers, there is a "new" norm (2013) UNI 9994-1:2013 that essentially prescribes for them an overall lifetime (besides the need for pe

In Italy, for fire extinguishers, there is a "new" norm (2013) UNI 9994-1:2013 that essentially prescribes for them an overall lifetime (besides the need for periodical inspection/maintenance/recharging/re-certification) of 18 years, i.e. anything manufactured in a given year, 18 years later must be replaced with a new unit. For other pressurized tanks, I believe a line is drawn at 12 kg/cm2 (it depends also on size, those smaller than 25 lt are excluded), those up to that pressure have periodical visual and pressure tests (every 2, 3 or 4 years depending on a number of factors), those above that have additionally those (ultrasound) checks for the integrity every 10 years, but the norms are complex, no idea which specific ones may apply to this thing here.