Hi,

I've been searching for an official guideline (European legislation/standard) that states the period after which a safety valve has to be replaced or recalibrated.

I always tought it was good practise to check the safety valves (and the exchaust pipe) every 6 months visually and to replace the valves each 5 years (and after they have been open of course).
But I wonder if their is any official guideline on this.

I would need the European guidelines on this, however I'm also interested what is done in the rest of the world (or what officially should be done).

thanks.