Simple pressure vessels

Directive 2014/29/EU on the placing on the market and putting into service of simple pressure vessels (diving cylinders, for example) aims to ensure the protection of persons, domestic animals and property with regard to the hazards resulting from leakage or bursting and to have the same rules governing their sale throughout the EU. It lays down uniform rules on the placing on the market and putting into service of simple pressure vessels.


This Directive shall apply to simple pressure vessels (‘vessels’) manufactured in series with the following characteristics:

  1. the vessels are welded, intended to be subjected to an internal gauge pressure greater than 0,5 bar and to contain air or nitrogen, and are not intended to be fired;
  2. the parts and assemblies contributing to the strength of the vessel under pressure are made either of non-alloy quality steel or of non-alloy aluminium or non-age hardening aluminium alloys;
  3. the vessel is made of either of the following elements:
    1. a cylindrical part of circular cross-section closed by outwardly dished and/or flat ends which revolve around the same axis as the cylindrical part;
    2. two dished ends revolving around the same axis;
  4. the maximum working pressure of the vessel does not exceed 30 bar and the product of that pressure and the capacity of the vessel (PS × V) does not exceed 10 000 bar.L;
  5. the minimum working temperature is no lower than – 50 °C and the maximum working temperature is not higher than 300 °C for steel and 100 °C for aluminium or aluminium alloy vessels.

This Directive shall not apply to:

  1. vessels specifically designed for nuclear use, failure of which may cause an emission of radioactivity;
  2. vessels specifically intended for installation in or the propulsion of ships and aircraft;
  3. fire extinguishers.



Making available on the market means any supply of a vessel for distribution or use on the Union market in the course of a commercial activity, whether in return for payment or free of charge.

Placing on the market means the first making available of a vessel on the Union market.

Importer means any natural or legal person established within the Union who places a vessel from a third country on the Union market.

Distributor means any natural or legal person in the supply chain, other than the manufacturer or the importer, who makes a vessel available on the market.

Withdrawal means any measure aimed at preventing a vessel in the supply chain from being made available on the market.


Article 14 - EU declaration of conformity

  1. The EU declaration of conformity shall state that the fulfilment of the essential safety requirements set out in Annex I has been demonstrated.
  2. The EU declaration of conformity shall have the model structure set out in Annex IV, shall contain the elements specified in the relevant modules set out in Annex II and shall be continuously updated. It shall be translated into the language or languages required by the Member State in which the vessel is placed or made available on the market.
  3. Where a vessel is subject to more than one Union act requiring an EU declaration of conformity, a single EU declaration of conformity shall be drawn up in respect of all such Union acts. That declaration shall contain the identification of the Union acts concerned including their publication references.
  4. By drawing up the EU declaration of conformity, the manufacturer shall assume responsibility for the compliance of the vessel with the requirements laid down in this Directive.


Article 15 - General principles of the CE marking

The CE marking shall be subject to the general principles set out in Article 30 of Regulation (EC) No 765/2008.


Article 16 - Rules and conditions for affixing the CE marking and inscriptions

  1. The CE marking and the inscriptions referred to in point 1 of Annex III shall be affixed visibly, legibly and indelibly to the vessel or to its data plate.
  2. The CE marking shall be affixed before the vessel is placed on the market.
  3. The CE marking shall be followed by the identification number of the notified body involved in the production control phase. The identification number of the notified body shall be affixed by the body itself or, under its instructions, by the manufacturer or his authorised representative.
  4. The CE marking and the identification number of the notified body may be followed by any other mark indicating a special risk or use.
  5. Member States shall build upon existing mechanisms to ensure correct application of the regime governing the CE marking and shall take appropriate action in the event of improper use of that marking.

Legal acts repealed:

Directive 2009/105/EC

Directive 1987/404/EEC

Previous guidelines: