The periodic check of the safety valves is one of the activities foreseen by the legislation in force for the purposes of the correct maintenance of the systems as prescribed by the D.M. n. 329 of 1 December 2004.
Verification of operation during periodic checks “can be carried out with bench tests, with simulations, or, where not detrimental to the operating conditions, by determining the intervention on site.”
In particular, “the verification may consist in ascertaining that calibration has taken place within the time limits established by the manufacturer and in any case within the limits relating to the periodicity of the requalification checks.” (Article 13, paragraph b).
“The checks relating to safety and pressure accessories follow the same frequency as the pressure equipment to which they are intended or to which they are connected.” (Article 10, paragraph 4)