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Application of the pressure equipment directive "PED" to safety valves

The new Directive 2014/68/EU (Pressure Equipment Directive "PED", former 97/23/EC), became effective on 16 July 2016 introducing a new framework of reference to be used for the manufacturing and marketing of components under pressure, contributing to the creation of a single European Market where the technical requirements for the building and use of equipment are the same.

The PED Directive applies to the design, manufacture and testing (enclosure I B 2.11.1) of pressure equipment (subject to a maximum allowable pressure PS greater than 0.5 bar) and for the safety accessories such as (art.1 B2.1.3) including safety valves, designed to protect equipment under pressure.

In virtue of their very important function, the safety valves are classified as "category IV", that is the highest risk category and the category subject to the procedure for verification of compliance with the essential safety requirements (modules), described in detail in Annex III of the Directive, foresees the application of Modules B+D where:

Module B
(EC type-examination)

The notified body ascertains and declares, by issuing an EC type certificate, after having examined the technical documentation of the valves and after having attended the experimental tests, that the assessed safety valves meet the provisions of the applicable PED Directive.

Module D
(Production quality assurance)

The production quality assurance system, other than being in compliance with the international regulation ISO 9001:2015, must guarantee the compliance of the product to the model subject of the type-examination.
The notified Body approves and supervises the quality system, carrying out inspections without prior notice. Tests and controls are performed on the products on occasion of these visits.

Only after having successfully passed these tests our safety valves can bear the CE mark followed by the identification number from the notified Body (Pascal Consortium no. 1115).