The Pressure Equipment Directive (PED - Pressure Equipment Directive - 2014/68 / EU) is a product Directive that became mandatory as of July 19, 2016.

It regulates at the European level:

  • design
  • manufacturing
  • conformity assessment of equipment and pressure assemblies

Piping, safety and pressure accessories and all vessels subjected to a maximum allowable pressure PS greater than 0.5 bar, fall within the Directive's scope of applicability.

All pressure equipment must be subjected to an assessment procedure, according to the category in which it is classified, for the verification of compliance with ESR (Essential Safety Requirements).

The verification of conformity, especially for equipment that falls under categories II to IV, will be carried out by a Notified Body.

The PED directive is applicable for pressure equipment to be placed on the Community market, thus on all new production and moreover, when there is a substantial modification to a product already on the market such as to require re-evaluation.

All installations of pressure equipment subject to the PED Directive must be subsequently reported to ISPESL (Ministerial Decree No. 392/04).


Manufacturers of pressure equipment are required to assess and identify the level of risk, associated with the pressure, but not only generated by it, due to the intended use of the equipment they plan to put on the Community market.

The higher the level of risk, the greater the category the equipment belongs to.

The definition of the category of equipment is made by the comparison of the following data with the reference tables in Annex II of the Directive.

  • the apparatus size (volume V in litres in the case of containers, diameter DN in mm in the case of pipes)
  • maximum allowable pressure (PS): the maximum pressure in bar, for which the equipment is designed, according to the manufacturer's specification
  • minimum/maximum allowable temperature (TS): maximum/minimum temperatures for which the equipment is designed, according to the manufacturer's specification
  • fluid: gas, liquids, vapour in pure form or mixtures thereof

The equipment or the set of equipment is placed in the most severe risk category of those dedicated to pressure equipment, with the exception of safety accessories, which are automatically classified in category IV, which is the one assigned the highest risk.

The EC certification procedures for the PED Directives vary depending on the risk category of the general pressure equipment.

In case of proven low danger limits (as provided in Article 3, paragraph 3 of the Directive), affixing a CE mark is not necessary, and the product can be put on the market accompanied only by the information necessary for the buyer to properly use the equipment itself.

For classes I, II, III or IV, it is mandatory to issue the Declaration of Conformity and affix the CE mark, an operation that, for classes II, III and IV is authorised by the notified body.To be able to affix these, the manufacturer must follow, in each implementation phase, more and more demanding requirements with each higher class.These requirements vary based on the supplied product:

  • for category I, which less dangerous equipment falls under, CE certification is mandatory without requiring the intervention of the Notified Body, in fact, the PED Directive allows for that which is usually called "self-certification", that is, the CE marking of the object based on the preparation of a technical file - demonstrating that it meets the essential requirements of Annex I of the Directive and also justifies the membership of the product to category I, accompanied by an EC Declaration of Conformity issued by the manufacturer and intended for the buyer.
  • for category II, CE certification by a notified body is mandatory, which without considering the merits of the design, also sees to carrying out surveillance of production in the methods chosen by the manufacturer.
  • for category III CE certification by a notified body is mandatory.Where the manufacturer has not also certified its quality system, including the design, extensive tests must be run on the prototype to be certified CE
  • risk category IV requires the highest level of design and production control.This regards safety accessories (automatically), and sets consisting of vessels + piping with the use of hazardous fluid at elevated pressures.Category IV is never reached in the case of fluids of Group 2 with vapour pressure less than 0.5 bar (eg .: water with a temperature lower than 110 °C), whatever the size of the equipment.


    The service of pressure equipment and assemblies is addressed to the manufacturer (or its authorised representative in the Community)

    The ANCCP Certification Agency is a notified body in the field of Directive 2014/68/EU (EC Notification No. 1131) and works through the CEC consortium, of which it is also a founding member.

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