Whereas the internal market is an area without internal frontiers in which the free movement of goods, persons, services and capital is ensured;

Whereas there are differences in the content and scope of the laws, regulations and administrative provisions in force in the Member States with regard to the safety and protection of health of persons and, where appropriate, domestic animals or property, where pressure equipment not covered by present Community legislation is concerned; whereas the certification and inspection procedures for such equipment differ from one Member State to another; whereas such disparities may well constitute barriers to trade within the Community;

Whereas the harmonization of national legislation is the only means of removing these barriers to free trade; whereas this objective cannot be achieved satisfactorily by the individual Member States; whereas this Directive only lays down indispensable requirements for the free circulation of the equipment to which it is applicable;

Whereas equipment subject to a pressure of not more than 0,5 bar does not pose a significant hazard due to pressure; whereas there should not therefore be any obstacle to its free movement within the Community; whereas this Directive applies to equipment subject to a maximum allowable pressure PS exceeding 0,5 bar;

Whereas this Directive relates also to assemblies composed of several pieces of pressure equipment assembled to constitute an integrated and functional whole; whereas these assemblies may range from simple assemblies such as pressure cookers to complex assemblies such as watertube boilers; whereas, if the manufacturer of an assembly intends it to be placed on the market and put into service as an assembly — and not in the form of its constituent non-assembled elements — that assembly must conform to this Directive; whereas, on the other hand, this Directive does not cover the assembly of pressure equipment on the site and under the responsibility of the user, as in the case of industrial installations;

Whereas this Directive harmonizes national provisions on hazards due to pressure; whereas the other hazards which this equipment may present accordingly may fall within the scope of other Directives dealing with such hazards; whereas, however, pressure equipment may be included among products covered by other Directives based on Article 100a of the Treaty; whereas the provisions laid down in some of those Directives deal with the hazard due to pressure; whereas those provisions are considered adequate to provide appropriate protection where the hazard due to pressure associated with such equipment remains small; whereas, therefore, there are grounds for excluding such equipment from the scope of this Directive;

Whereas, for pressure equipment covered by international Conventions, transport and pressure hazards are due to be dealt with as soon as possible by forthcoming Community Directives based on such Conventions or by supplements to existing Directives; whereas such equipment is accordingly excluded from the scope of this Directive;

Whereas certain types of pressure equipment, although subject to a maximum allowable pressure PS higher than 0,5 bar, do not present any significant hazard due to pressure, and therefore the freedom of movement of such equipment in the Community should not be hindered if it has been legally manufactured or placed on the market in a Member State; whereas it is not necessary in order to ensure free movement of such equipment to include it in the scope of this Directive; whereas consequently it is expressly excluded from its scope;

Whereas other pressure equipment subject to a maximum allowable pressure higher than 0,5 bar and presenting a significant hazard due to pressure, but in respect of which free movement and an appropriate level of safety are guaranteed, is excluded from the scope of this Directive; whereas such exclusions should, however, be regularly reviewed in order to ascertain whether it is necessary to take action at Union level;

Whereas the scope of this Directive must be based on a general definition of the term ‘pressure equipment’ so as to allow for the technical development of products;

Whereas compliance with the essential safety requirements is necessary in order to ensure the safety of pressure equipment; whereas those requirements have been subdivided into general and specific requirements which must be met by pressure equipment; whereas in particular the specific requirements are intended to take account of particular types of pressure equipment; whereas certain types of pressure equipment in categories III and IV must be subject to a final assessment comprising final inspection and proof tests;

Whereas Member States should be in a position to allow the showing at trade fairs of pressure equipment which is not yet in conformity with the requirements of this Directive; whereas, during demonstrations, appropriate safety measures must be taken in accordance with the general safety rules of the Member State concerned to ensure the safety of persons;

Whereas in order to ease the task of demonstrating compliance with the essential requirements, standards harmonized at European level are useful, especially with regard to the design, manufacture and testing of pressure equipment, compliance with which enables a product to be presumed to meet the said essential requirements; whereas standards harmonized at European level are drawn up by private bodies and must retain their non-mandatory status; whereas, for this purpose, the European Committee for Standardization (CEN) and the European Committee for Electrotechnical Standardization (Cenelec) are recognized as being the bodies that are competent to adopt harmonized standards that follow the general guidelines for cooperation between the Commission and those two bodies signed on 13 November 1984;

Whereas manufacturing of pressure equipment calls for the utilization of safe materials; whereas in the absence of harmonized standards it is useful to define the characteristics of the materials intended for repeated use; whereas this definition is established by European approvals for materials, such approvals being issued by one of the notified bodies specifically designated for that task; whereas the materials conforming to the European approvals shall be presumed to satisfy the essential requirements of this Directive;

Whereas Member States should be in a position to authorize user inspectorates to carry out certain tasks for conformity assessment in the framework of this Directive; whereas for that purpose this Directive sets out criteria for the authorization of user inspectorates by Member States;

Whereas, under the conditions laid down by this Directive, certain procedures for conformity assessment may require each item to be inspected and tested by a notified body or a user inspectorate as part of the final assessment of the pressure equipment; whereas in other cases provision should be made to ensure that the final assessment may be monitored by a notified body by means of unexpected visits;

Whereas pressure equipment will, as a general rule, bear the CE marking affixed either by the manufacturer or by his authorized representative established within the Community; whereas the CE marking means that the pressure equipment complies with the provisions of this Directive and those of other applicable Community directives on CE marking; whereas for pressure equipment defined in this Directive which presents only a minor pressure hazard and for which certification procedures are therefore not justified, the CE marking will not be affixed;

Whereas it is appropriate that the Member States, as provided for by Article 100a of the Treaty, may take provisional measures to limit or prohibit the placing on the market, putting into service and use of pressure equipment in cases where it presents a particular risk to the safety of persons and, where appropriate, domestic animals or property, provided that the measures are subject to a Community control procedure;

Whereas the addressees of any decision taken under this Directive must be aware of the reasons behind that decision and the means of appeal open to them;

Whereas it is necessary to lay down a transitional arrangement enabling pressure equipment manufactured in compliance with the national regulations in force on the date of entry into force of this Directive to be marketed and put into service;

Whereas the requirements laid down in the Annexes should be made as clear as possible so as to allow all users, including small and medium-sized enterprises (SMEs), to comply with them easily;