Pressure testing single tank med visuell kontroll

The usual interval for pressure testing of bottles in Norway is every 2 years. The exception is for new bottles that will be tested for the first time 3 years after the date of manufacture. The reason for this exception is that it takes some time for a bottle to be produced until it is put into use, so that it will practically be around approx. 2 years from the bottle has been purchased new until it is first tested.